Power Master
MI 2892
Instruction manual
Version 1.1, Code No. 20 752 217
2
Distributor:
Manufacturer:
METREL d.d.
Ljubljanska cesta 77
1354 Horjul
Slovenia
web site: http://www.metrel.si
e-mail: metrel@metrel.si
Mark on your equipment certifies that this equipment meets the requirements of the EU
(European Union) concerning safety and interference causing equipment regulations
© 2013 METREL
No part of this publication may be reproduced or utilized in any form or by any means
without permission in writing from METREL.
MI 2892 Power Master Table of contents
3
1 Introduction ............................................................................................................. 7
1.1 Main Features ................................................................................................... 7
1.2 Safety considerations ........................................................................................ 8
1.3 Applicable standards ......................................................................................... 9
1.4 Abbreviations ................................................................................................... 10
2 Description ............................................................................................................ 19
2.1 Front panel ...................................................................................................... 19
2.2 Connector panel .............................................................................................. 20
2.3 Bottom view ..................................................................................................... 21
2.4 Accessories ..................................................................................................... 21
2.4.1 Standard accessories ............................................................................... 21
2.4.2 Optional accessories ................................................................................ 21
3 Operating the instrument ..................................................................................... 22
3.1 Instrument status bar ....................................................................................... 23
3.2 Instrument keys ............................................................................................... 24
3.3 Instrument memory (microSD card) ................................................................ 24
3.4 Instrument Main Menu ..................................................................................... 25
3.4.1 Instrument submenus ............................................................................... 26
3.5 U, I, f ................................................................................................................ 28
3.5.1 Meter ........................................................................................................ 28
3.5.2 Scope ....................................................................................................... 30
3.5.3 Trend ........................................................................................................ 32
3.6 Power .............................................................................................................. 34
3.6.1 Meter ........................................................................................................ 34
3.6.2 Trend ........................................................................................................ 36
3.7 Energy ............................................................................................................. 39
3.7.1 Meter ........................................................................................................ 39
3.7.2 Trend ........................................................................................................ 40
3.8 Harmonics / interharmonics ............................................................................. 41
3.8.1 Meter ........................................................................................................ 41
3.8.2 Histogram (Bar) ........................................................................................ 43
3.8.3 Trend ........................................................................................................ 45
3.9 Flickers ............................................................................................................ 47
3.9.1 Meter ........................................................................................................ 47
3.9.2 Trend ........................................................................................................ 48
3.10 Phase Diagram ................................................................................................ 50
3.10.1 Phase diagram ......................................................................................... 50
3.10.2 Unbalance diagram .................................................................................. 51
3.10.3 Unbalance trend ....................................................................................... 52
3.11 Temperature .................................................................................................... 53
3.11.1 Meter ........................................................................................................ 53
3.11.2 Trend ........................................................................................................ 54
3.12 Signalling ......................................................................................................... 54
3.12.1 Meter ........................................................................................................ 55
3.12.2 Trend ........................................................................................................ 56
3.13 General Recorder ............................................................................................ 57
3.14 Waveform/inrush recorder ............................................................................... 58
3.14.1 Setup ........................................................................................................ 58
3.14.2 Capturing waveform ................................................................................. 59
3.14.3 Captured waveform .................................................................................. 61
MI 2892 Power Master Table of contents
4
3.15 Transient recorder ........................................................................................... 62
3.15.1 Setup ........................................................................................................ 62
3.15.2 Capturing transients ................................................................................. 63
3.15.3 Captured transients .................................................................................. 65
3.16 Events table ..................................................................................................... 66
3.17 Alarms table .................................................................................................... 70
3.18 Memory List ..................................................................................................... 72
3.18.1 General Record ........................................................................................ 73
3.18.2 Waveform snapshot ................................................................................. 76
3.18.3 Waveform/inrush record ........................................................................... 78
3.18.4 Transients record ..................................................................................... 78
3.19 Measurement Setup submenu ........................................................................ 78
3.19.1 Connection setup ..................................................................................... 79
3.19.2 Event setup .............................................................................................. 82
3.19.3 Alarm setup .............................................................................................. 82
3.19.4 Signalling setup ........................................................................................ 84
3.20 General Setup submenu .................................................................................. 84
3.20.1 Communication ........................................................................................ 85
3.20.2 Time & Date ............................................................................................. 86
3.20.3 Time & Date ............................................................................................. 86
3.20.4 Language ................................................................................................. 87
3.20.5 Instrument info ......................................................................................... 88
3.20.6 Lock/Unlock .............................................................................................. 88
3.20.7 Colour model ............................................................................................ 90
4 Recording Practice and Instrument Connection ............................................... 92
4.1 Measurement campaign .................................................................................. 92
4.2 Connection setup ............................................................................................ 96
4.2.1 Connection to the LV Power Systems ...................................................... 96
4.2.2 Connection to the MV or HV Power System ........................................... 100
4.2.3 Current clamp selection and transformation ratio setting ....................... 101
4.2.4 Temperature probe connection .............................................................. 105
4.2.5 GPS time synchronization device connection ........................................ 105
4.3 Remote instrument connection (over Internet) .............................................. 106
4.3.1 Communication principle ........................................................................ 106
4.3.2 Instrument setup on remote measurement site ...................................... 107
4.3.3 PowerView setup for instrument remote access .................................... 108
4.3.4 Remote connection ................................................................................ 110
4.4 Number of measured parameters and connection type relationship ............. 121
5 Theory and internal operation ........................................................................... 123
5.1 Measurement methods .................................................................................. 123
5.1.1 Measurement aggregation over time intervals ....................................... 123
5.1.2 Voltage measurement (magnitude of supply voltage) ............................ 123
5.1.3 Current measurement (magnitude of supply current) ............................. 124
5.1.4 Frequency measurement ....................................................................... 125
5.1.5 Power measurement (Standard compliance: IEEE 1459-2010) ............. 125
5.1.6 Energy .................................................................................................... 131
5.1.7 Harmonics and interharmonics ............................................................... 132
5.1.8 Signalling ................................................................................................ 134
5.1.9 Flickers ................................................................................................... 135
5.1.10 Voltage and current unbalance .............................................................. 136
MI 2892 Power Master Table of contents
5
5.1.11 Voltage events ....................................................................................... 136
5.1.12 Alarms .................................................................................................... 139
5.1.13 Data aggregation in GENERAL RECORDING ....................................... 139
5.1.14 Waveform snapshot ............................................................................... 142
5.1.15 Waveform record .................................................................................... 143
5.1.16 Transient recorder .................................................................................. 144
5.2 EN 50160 Standard Overview ....................................................................... 145
5.2.1 Power frequency .................................................................................... 145
5.2.2 Supply voltage variations ....................................................................... 146
5.2.3 Supply voltage unbalance ...................................................................... 146
5.2.4 THD voltage and harmonics ................................................................... 146
5.2.5 Interharmonic voltage ............................................................................. 146
5.2.6 Mains signalling on the supply voltage ................................................... 147
5.2.7 Flicker severity ....................................................................................... 147
5.2.8 Voltage dips ........................................................................................... 147
5.2.9 Voltage swells ........................................................................................ 148
5.2.10 Short interruptions of the supply voltage ................................................ 148
5.2.11 Long interruptions of the supply voltage ................................................. 148
5.2.12 Power Master recorder setting for EN 50160 survey .............................. 148
6 Technical specifications .................................................................................... 149
6.1 General specifications ................................................................................... 149
6.2 Measurements ............................................................................................... 149
6.2.1 General description ................................................................................ 149
6.2.2 Phase Voltages ...................................................................................... 150
6.2.3 Line voltages .......................................................................................... 151
6.2.4 Current ................................................................................................... 151
6.2.5 Frequency .............................................................................................. 153
6.2.6 Flickers ................................................................................................... 153
6.2.7 Combined power .................................................................................... 153
6.2.8 Fundamental power ................................................................................ 153
6.2.9 Nonfundamental power .......................................................................... 154
6.2.10 Power factor (PF) ................................................................................... 155
6.2.11 Displacement factor (DPF) or Cos φ) ..................................................... 155
6.2.12 Energy .................................................................................................... 155
6.2.13 Voltage harmonics and THD .................................................................. 156
6.2.14 Current harmonics and THD .................................................................. 156
6.2.15 Voltage interharmonics ........................................................................... 156
6.2.16 Current interharmonics ........................................................................... 156
6.2.17 Signalling ................................................................................................ 157
6.2.18 Unbalance .............................................................................................. 157
6.2.19 Time and duration uncertainty ................................................................ 157
6.2.20 Temperature probe ................................................................................. 157
6.3 Recorders ...................................................................................................... 158
6.3.1 General recorder .................................................................................... 158
6.3.2 Waveform/inrush recorder ...................................................................... 158
6.3.3 Waveform snapshot ............................................................................... 159
6.3.4 Transients recorder ................................................................................ 159
6.4 Standards compliance ................................................................................... 159
6.4.1 Compliance to the IEC 61557-12 ........................................................... 159
6.4.2 Compliance to the to the IEC 61000-4-30 .............................................. 160
MI 2892 Power Master Table of contents
6
7 Maintenance ........................................................................................................ 161
7.1 Inserting batteries into the instrument ........................................................... 161
7.2 Batteries ........................................................................................................ 162
7.3 Power supply considerations ......................................................................... 163
7.4 Cleaning ........................................................................................................ 164
7.5 Periodic calibration ........................................................................................ 164
7.6 Service .......................................................................................................... 164
7.7 Troubleshooting ............................................................................................. 164
MI 2892 Power Master Introduction
7
1 Introduction
Power Master is handheld multifunction instrument for power quality analysis and
energy efficiency measurements.
Figure 1.1: Power Master instrument
1.1 Main Features
Full compliance with power quality standard IEC 61000-4-30 Class A.
Simple and powerful recorder with microSD memory card (sizes up to 32 GB are
supported).
4 voltage channels with wide measurement range: up to 1000 Vrms, CAT III /
1000 V, with support for medium and high voltage systems.
Simultaneous voltage and current (8 channels) sampling, 16 bit AD conversion
for accurate power measurements and minimal phase shift error.
4 current channels with support for automatic clamp recognition and range
selection.
Compliance with IEC 61557-12 and IEEE 1459 (Combined, fundamental,
nonfundamental power) and IEC 62053-22 (Energy).
MI 2892 Power Master Introduction
8
4.3’’ TFT colour display, easy internet remote access over Ethernet.
Waveform/inrush recorder, which can be triggered on event or alarms, and run
simultaneously with general recorder.
Powerful troubleshooting tools: transient recorder with envelope and level
triggering.
PC Software PowerView v3.0 is an integral part of a measuring system which
provides easiest way to download, view and analyse measured data or print
reports.
o PowerView v3.0 analyser exposes a simple but powerful interface for
downloading instrument data and getting quick, intuitive and descriptive
analysis. Interface has been organized to allow quick selection of data
using a Windows Explorer-like tree view.
o User can easily download recorded data, and organize it into multiple sites
with many sub-sites or locations.
o Generate charts, tables and graphs for your power quality data analysing,
and create professional printed reports.
o Export or copy / paste data to other applications (e.g. spreadsheet) for
further analysis.
o Multiple data records can be displayed and analysed simultaneously.
Merge different logging data into one measurement, synchronize data
recorded with different instruments with time offsets, split logging data into
multiple measurements, or extract data of interest.
1.2 Safety considerations
To ensure operator safety while using the Power Master instruments and to minimize
the risk of damage to the instrument, please note the following general warnings:
The instrument has been designed to ensure maximum operator safety. Usage in
a way other than specified in this manual may increase the risk of harm to the
operator!
Do not use the instrument and/or accessories if any visible damage is noticed!
The instrument contains no user serviceable parts. Only an authorized dealer
can carry out service or adjustment!
All normal safety precautions have to be taken in order to avoid risk of electric
shock when working on electrical installations!
Only use approved accessories which are available from your distributor!
Instrument contains rechargeable NiMH batteries. The batteries should only be
replaced with the same type as defined on the battery placement label or in this
manual. Do not use standard batteries while power supply adapter/charger is
connected, otherwise they may explode!
Hazardous voltages exist inside the instrument. Disconnect all test leads,
remove the power supply cable and switch off the instrument before removing
battery compartment cover.
MI 2892 Power Master Introduction
9
Maximum nominal voltage between any phase and neutral input is 1000 V
RMS
.
Maximum nominal voltage between phases is 1730 V
RMS
.
Always short unused voltage inputs (L1, L2, L3, GND) with neutral (N) input to
prevent measurement errors and false event triggering due to noise coupling.
Do not remove microSD memory card while instrument is recording or reading
data. Record damage and card failure can occur.
1.3 Applicable standards
The Power Master are designed and tested in accordance with the following standards:
Electromagnetic compatibility(EMC)
EN 61326-2-2: 2013
Electrical equipment for measurement, control
and laboratory use – EMC requirements –
Part 2-2: Particular requirements - Test
configurations, operational conditions and
performance criteria for portable test, measuring
and monitoring equipment used in low-voltage
distribution systems
Emission: Class A equipment (for industrial
purposes)
Immunity for equipment intended for use in
industrial locations
Safety (LVD)
EN 61010-1: 2010
Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 1: General requirements
EN 61010-2-030: 2010
Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 2-030: Particular requirements for testing and
measuring circuits
EN 61010-031: 2002 + A1: 2008
Safety requirements for electrical equipment for
measurement, control and laboratory use –
Part 031: Safety requirements for hand-held
probe assemblies for electrical measurement and
test
EN 61010-2-032: 2012
Safety requirements for electrical equipment for
measurement, control and laboratory use
Part 031: Safety requirements for hand-held
probe assemblies for electrical measurement and
test
Measurement methods
IEC 61000-4-30: 2008 Class A Part 4-30: Testing and measurement techniques –
Power quality measurement methods
IEC 61557-12: 2007 Equipment for testing, measuring or monitoring of
protective measures – Part 12: Performance
measuring and monitoring devices (PMD)
IEC 61000-4-7: 2002 + A1: 2008 Part 4-7: Testing and measurement techniques –
MI 2892 Power Master Introduction
10
General guide on harmonics and interharmonics
measurements and instrumentation for power
supply systems and equipment connected thereto
IEC 61000-4-15 : 2010 Part 4-15: Testing and measurement techniques –
Flickermeter – Functional and design
specifications
IEC 62053-22 : 2003 Part 22: Static meters for active energy (Class
0.5S)
IEC 62053-23 : 2003 Part 22: Part 23: Static meters for reactive energy
(Class 2)
IEEE 1459 : 2010 IEEE Standard Definitions for the Measurement of
Electric Power Quantities Under Sinusoidal,
Nonsinusoidal, Balanced, or Unbalanced
Conditions
EN 50160 : 2010 Voltage characteristics of electricity supplied by
public electricity networks
Note about EN and IEC standards:
Text of this manual contains references to European standards. All standards of EN
6XXXX (e.g. EN 61010) series are equivalent to IEC standards with the same number
(e.g. IEC 61010) and differ only in amended parts required by European harmonization
procedure.
1.4 Abbreviations
In this document following symbols and abbreviations are used:
CF
I
Current crest factor, including CF
Ip
(phase p current crest
factor) and CF
IN
(neutral current crest factor). See 5.1.3
for definition.
CF
U
Voltage crest factor, including CF
Upg
(phase p to phase g
voltage crest factor) and CF
Up
(phase p to neutral voltage
crest factor). See 5.1.2 for definition.
DPF
ind/cap
Instantaneous phase power displacement (fundamental)
power factor or cos , including DPFp
ind
(phase p power
displacement).
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character.
MI 2892 Power Master Introduction
11
DPF
ind/cap
Recorded phase displacement (fundamental) power
factor or cos , including DPFp
ind/cap
(phase p power
displacement).
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix
ind/cap represents inductive/
capacitive character. This
parameter is recorded
separately for each quadrant
as shown on figure. See 5.1.5
for definition.
DPF
+
totind
DPF
+
totcap
Instantaneous positive sequence fundamental power
factor.
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character. See 5.1.5 for definition.
DPF
+
totind
DPF
+
totcap
Recorded total effective
fundamental power factor.
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix ind/cap
represents inductive/capacitive
character. This parameter is
recorded separately as shown
on figure. See 5.1.5 for
definition.
Dı
Phase current distortion power, including Dıp (phase p
current distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
Deı
tot
Total effective current distortion power. See 5.1.5 section:
Power measurement (Standard compliance: IEEE 1459-
2010) for definition.
DH
Phase harmonics distortion power, including DHp (phase
p harmonics distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
DeH
Total effective harmonics distortion power. See 5.1.5
section: Total nonfundamental power measurements for
definition.
Dᴠ
Phase voltage distortion power, including Dᴠp (phase p
voltage distortion power). See 5.1.5 section: Power
measurement (Standard compliance: IEEE 1459-2010)
for definition.
Deᴠ
tot
Total effective voltage distortion power. See 5.1.5
27
0
0
DPFind+
DPFcap+
DPFcap-
DPFind-
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
27
0
0
L
e
a
d
L
a
g
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
DPF
+
totind+
DPF
+
totcap+
DPF
+
totcap-
DPF
+
totind-
MI 2892 Power Master Introduction
12
section: Power measurement (Standard compliance:
IEEE 1459-2010) for definition.
Ep
Recorded phase combined (fundamental and
nonfundamental) active energy, including Ep
p
+/-
(phase p
active energy). Minus sign indicates generated energy
and plus sign indicates consumed energy. See 5.1.6 for
definition.
Ep
tot
Recorded total combined (fundamental and
nonfundamental) active energy. Minus sign indicates
generated and plus sign indicates consumed energy. See
5.1.6 for definition.
Eq
Recorded phase fundamental reactive energy, including
Eq
p
+/-
(phase p reactive energy). Minus sign indicates
generated and plus sign indicates consumed energy. See
5.1.6 for definition.
Eq
tot
Recorded total fundamental reactive energy. Minus sign
indicates generated and plus sign indicates consumed
energy. See 5.1.6 for definition.
f, freq
Frequency, including freq
U12
(voltage frequency on U12),
freqU1 (voltage frequency on U1 and freqI1 (current
frequency on I1). See 5.1.4 for definition.
i-
Negative sequence current ratio (%). See 5.1.10 for
definition.
i0
Zero sequence current ratio (%). See 5.1.10 for definition.
I
+
Positive sequence current component on three phase
systems. See 5.1.10 for definition.
I-
Negative sequence current component on three phase
systems. See 5.1.10 for definition.
I0
Zero sequence current components on three phase
systems. See 5.1.10 for definition.
I
Rms½
RMS current measured over each half period , including
I
p
Rms½
(phase p current), I
N
Rms½
(neutral RMS current)
Ifund
Fundamental RMS current Ih1 (on 1st harmonics),
including Ifundp (phase p fundamental RMS current) and
IfundN (neutral RMS fundamental current). See 5.1.7 for
definition
Ih
n
nth current RMS harmonic component including Iph
n
(phase p; nth RMS current harmonic component) and INh
n
(neutral nth RMS current harmonic component). See 5.1.7
for definition
Iih
n
nth current RMS interharmonic component including Ipih
n
(phase p; nth RMS current interharmonic component) and
I
Nihn
(neutral n
th
RMS current interharmonic component).
See 5.1.7 for definition
MI 2892 Power Master Introduction
13
I
Nom
Nominal current. Current of clamp-on current sensor for 1
Vrms at output.
I
Pk
Peak current, including IpPk (phase p current) including INPk
(neutral peak current)
I
Rms
RMS current, including IpRms (phase p current), INRms
(neutral RMS current). See 5.1.3 for definition.
P
Instantaneous phase active
combined (fundamental and
nonfundamental) power,
including Pp (phase p active
power). Minus sign indicates
generated and plus sign
indicates consumed power. See
5.1.5 for definitions.
P
Recorded phase active (fundamental and
nonfundamental) power, including P
p
(phase p active
power). Minus sign indicates generated and plus sign
indicates consumed power. See 5.1.5 for definitions.
P
tot
Instantaneous total active
combined (fundamental and
nonfundamental) power. Minus
sign indicates generated and
plus sign indicates consumed
power. See 5.1.5 for definitions.
P
tot
Recorded total active (fundamental and nonfundamental)
power. Minus sign indicates generated and plus sign
indicates consumed power. See 5.1.5 for definitions.
Pfund
Instantaneous active fundamental power, including
Pfund
p
(phase p active fundamental power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
Pfund+
Recorded phase active fundamental power, including
Pfund
p
(phase p active fundamental power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
P+,
P
+
tot
Instantaneous positive sequence of total active
fundamental power. Minus sign indicates generated and
plus sign indicates consumed power.
See 5.1.5 for definitions.
P
+
tot
Recorded positive sequence of total active fundamental
power. Minus sign indicates generated and plus sign
indicates positive sequence of consumed power.
See 5.1.5 for definitions.
27
0
0
L
e
a
d
180
0
90
0
0
0
+P
-P
I
II
III IV
+P-P
27
0
0
L
e
a
d
180
0
90
0
0
0
+Ptot
I
II
III IV
+Ptot
-Ptot
-Ptot
MI 2892 Power Master Introduction
14
P
H
Instantaneous phase active harmonic power, including
P
Hp
(phase p active harmonic power). Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
P
H
Recorded phase active harmonics power, including P
Hp
(phase p active harmonic power). Minus sign indicates
generated and plus sign indicates consumed power. See
5.1.5 for definitions.
P
Htot
Instantaneous total active harmonic power. Minus sign
indicates generated and plus sign indicates consumed
power. See 5.1.5 for definitions.
P
Htot
Recorded total active harmonics power. Minus sign
indicates generated and plus sign indicates consumed
active power. See 5.1.5 for definitions.
PF
ind
PF
cap
Instantaneous phase combined
(fundamental and
nonfundamental) power factor,
including PFpind/cap (phase p
power factor). Minus sign
indicates generated power and
plus sign indicates consumed
power. Suffix ind/cap
represents inductive/capacitive
character.
Note: PF = DPF when harmonics are not present. See
5.1.5 for definition.
PF
ind
PF
cap
Recorded phase combined
(fundamental and
nonfundamental) power factor.
Minus sign indicates generated
power and plus sign indicates
consumed power. Suffix
ind/cap represents inductive/
capacitive character. This
parameter is recorded separately for each quadrant as
shown on figure.
PFe
totind
PFe
totcap
Instantaneous total effective combined (fundamental and
nonfundamental) power factor.
Minus sign indicates generated power and plus sign
indicates consumed power. Suffix ind/cap represents
inductive/capacitive character. See 5.1.5 for definition.
27
0
0
+PFind
+PFcap
-PFcap
-PFind
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
27
0
0
PFind
+
PFcap
+
PFcap
-
PFind
-
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
MI 2892 Power Master Introduction
15
PFe
totind
PFe
totcap
Recorded total effective combined (fundamental and
nonfundamental) power factor.
Minus sign indicates
generated power and plus sign
indicates consumed power.
Suffix ind/cap represents
inductive/capacitive character.
This parameter is recorded
separately for each quadrant
as shown on figure.
P
lt
Phase long term flicker (2 hours), including P
ltpg
(phase p
to phase g long term voltage flicker) and P
ltp
(phase p to
neutral long term voltage flicker). See 5.1.9 for definition.
Pst
Short term flicker (10 minutes) including P
stpg
(phase p to
phase g short term voltage flicker) and P
stp
(phase p to
neutral voltage flicker). See 5.1.9 for definition.
P
st(1min)
Short term flicker (1 minute) including P
st(1min)pg
(phase p
to phase g short term voltage flicker) and P
st(1min)p
(phase
p to neutral voltage flicker). See 5.1.9 for definition.
P
inst
Instantaneous flicker including P
instpg
(phase p to phase g
instantaneous voltage flicker) and P
instp
(phase p to
instantaneous voltage flicker). See 5.1.9 for definition.
N
Instantaneous combined (fundamental and
nonfundamental) nonactive phase power including Np
(phase p nonactive phase power). Minus sign indicates
generated and plus sign indicate consumed nonactive
power. See 5.1.5 for definition.
N
ind
N
cap
Recorded phase combined
(fundamental and
nonfundamental) nonactive
power including N
cap/ind
p
(phase
p nonactive phase power).
Suffix ind/cap represents
inductive/capacitive character.
Minus sign indicates generated
and plus sign indicates consumed fundamental reactive
power. This parameter is recorded separately for each
quadrant as shown on figure. See 5.1.5 for definition.
Qfund
Instantaneous fundamental reactive phase power
including
Qp (phase p reactive phase power). Minus sign
indicates generated and plus sign indicates consumed
fundamental reactive power. See 5.1.5 for definition.
27
0
0
PFetotind
+
L
e
a
d
L
a
g
PFetotcap
+
PFetotcap
-
PFetotind
-
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
27
0
0
Nind
+
L
e
a
d
L
a
g
Ncap
-
Ncap
+
Nind
-
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
MI 2892 Power Master Introduction
16
Qfund
ind
Qfund
cap
Recorded phase fundamental
reactive power. Suffix ind/cap
represents inductive/capacitive
character. Minus sign indicates
generated and plus sign
indicates consumed
fundamental reactive power.
This parameter is recorded
separately for each quadrant as
shown on figure. See 5.1.5 for definition.
Q
+
totcap
Q
+
totind
Instantaneous positive sequence of total fundamental
reactive power. Suffix ind/cap represents inductive/
capacitive character. Minus sign indicates generated and
plus sign indicates consumed reactive power. See 5.1.5
for definition.
Q
+
totind
Q
+
totcap
Recorded positive sequence of total fundamental reactive
power. Suffix ind/cap represents inductive/capacitive
character. Minus sign indicates generated and plus sign
indicates consumed reactive power. This parameter is
recorded separately for each quadrant.
S
Combined (fundamental and nonfundamental) phase
apparent power including Sp (phase p apparent power).
See 5.1.5 for definition.
Se
tot
Combined (fundamental and nonfundamental) total
effective apparent power. See 5.1.5 for definition.
Sfund
Phase fundamental apparent power, including Sfundp
(phase p fundamental apparent power). See 5.1.5 for
definition.
S
+
tot
Positive sequence of total fundamental effective apparent
power. See 5.1.5 for definition.
Sᴜfund
tot
Unbalanced fundamental apparent power. See 5.1.5 for
definition.
Sɴ
Phase nonfundamental apparent power, including Sɴp
(phase p nonfundamental apparent power). See 5.1.5 for
definition.
Seɴ
Total nonfundamental effective apparent power. See
5.1.5 for definition.
Sн
Phase harmonic apparent power, including Sнp (phase p
harmonic apparent power). See 5.1.5 for definition.
Seн
tot
Total harmonic effective apparent power. See 5.1.5 for
definition.
THD
I
Total harmonic distortion current (in % or A), including
THD
Ip
(phase p current THD) and THD
IN
(neutral current
THD). See 5.1.7 for definition
27
0
0
Qind
+
L
e
a
d
L
a
g
Qcap
-
Qcap
+
Qind
-
180
0
90
0
0
0
+P-P
-Q
+Q
I
II
III IV
MI 2892 Power Master Introduction
17
THDU
Total harmonic distortion voltage related (in % or V)
including THD
Upg
(phase p to phase g voltage THD) and
THDUp (phase p to neutral voltage THD). See 5.1.10 for
definition.
u-
Negative sequence voltage ratio (%). See 5.1.10 for
definition.
u0
Zero sequence voltage ratio (%). See 5.1.10 for
definition.
U, U
Rms
RMS voltage, including U
pg
(phase p to phase g voltage)
and Up (phase p to neutral voltage). See 5.1.2 for
definition.
U
+
Positive sequence voltage component on three phase
systems. See 5.1.10 for definition.
U-
Negative sequence voltage component on three phase
systems. See 5.1.10 for definition.
U0
Zero sequence voltage component on three phase
systems. See 5.1.10 for definition.
U
Di
p
Minimal U
Rms½
voltage measured during dip occurrence
Ufund
Fundamental RMS voltage (Uh1 on 1st harmonics),
including Ufund
pg
(phase p to phase g fundamental RMS
voltage) and Ufundp (phase p to neutral fundamental RMS
voltage). See 5.1.7 for definition
UhN,
nth voltage RMS harmonic component including Upgh
N
(phase p to phase g voltage nth RMS harmonic
component) and Uph
N
(phase p to neutral voltage n
th
RMS
harmonic component). See 5.1.7 for definition.
UihN
n
th
voltage RMS interharmonic component including
Upgih
N
(phase p to phase g voltage n
th
RMS interharmonic
component) and U
pihN
(phase p to neutral voltage n
th
RMS interharmonic component). See 5.1.7 for definition.
Nth RMS interharmonic voltage component measured
between phases. See 5.1.7 for definition.
U
Int
Minimal U
Rms½
voltage measured during interrupt
occurrence.
U
Nom
Nominal voltage, normally a voltage by which network is
designated or identified.
U
Pk
Peak voltage, including U
pgPk
(phase p to phase g
voltage) and U
pPk (phase p to neutral voltage)
U
Rms½
RMS voltage refreshed each half-cycle, including U
pgRms½
(phase p to phase g half-cycle voltage) and Up
Rms½
(phase p to neutral half-cycle voltage). See 5.1.11 for
definition.
MI 2892 Power Master Introduction
18
U
Swell
Maximal U
Rms½
voltage measured during swell
occurrence.
U
Sig
Mains signalling RMS voltage, including U
Sigpg
(phase p to
phase g half-cycle signalling voltage) and U
Sig
p (phase p
to neutral half-cycle signalling voltage). Signalling is a
burst of signals, often applied at a non-harmonic
frequency, that remotely control equipment. See 5.2.6 for
details.
MI 2892 Power Master Description
19
2 Description
2.1 Front panel
Figure 2.1: Front panel
Front panel layout:
1. LCD
Colour TFT display, 4.3 inch, 480 x 272 pixels.
2. F1 – F4
Function keys.
3. ARROW keys
Moves cursor and select parameters.
4. ENTER key
Step into submenu.
5. ESC key
Exits any procedure, confirms new settings.
6. SHORTCUT keys
Quick access to main instrument functions.
7. LIGHT key
(BEEP OFF)
High intensity LCD backlight on/off
If the LIGHT key is pressed for more than 1.5 seconds,
beeper will be disabled. Press & hold again to enable it.
MI 2892 Power Master Description
20
8. ON-OFF key
Turns on/off the instrument.
9. COVER
Communication ports and microSD card slot protection.
2.2 Connector panel
Warnings!
Use safety test leads only!
Max. permissible nominal voltage
between voltage input terminals and
ground is 1000 V
RMS
!
Max. short-term voltage of external power
supply adapter is 14 V!
Figure 2.2: Top connector panel
Top connector panel layout:
1 Clamp-on current transformers (I1, I2, I3, IN ) input terminals.
2 Voltage (L1, L2, L3, N, GND) input terminals.
3 12 V external power socket.
Figure 2.3: Side connector panel
Side connector panel layout:
1 MicroSD card slot.
2 PS/2 – RS232 / GPS serial connector.
3 Ethernet connector.
4 USB connector.
MI 2892 Power Master Description
21
2.3 Bottom view
Figure 2.4: Bottom view
Bottom view layout:
1. Battery compartment cover.
2. Battery compartment screw (unscrew to replace the batteries).
3. Serial number label.
2.4 Accessories
2.4.1 Standard accessories
Table 2.1: Power Master standard accessories
Description Pieces
Flexible current clamp 3000 A / 300 A / 30 A (A 1227) 4
Temperature probe (A 1354) 1
Colour coded test probe 5
Colour coded crocodile clip 5
Colour coded voltage measurement lead 5
USB cable 1
RS232 cable 1
Ethernet cable 1
12 V / 1.2 A Power supply adapter 1
NiMH rechargeable battery, type HR 6 (AA) 6
Soft carrying bag 1
Instruction manual 1
Compact disc (CD) with PowerView v3.0 and manuals 1
2.4.2 Optional accessories
See the attached sheet for a list of optional accessories that are available on request
from your distributor.
MI 2892 Power Master Operating the instrument
22
3 Operating the instrument
This section describes how to operate the instrument. The instrument front panel
consists of a colour LCD display and keypad. Measured data and instrument status are
shown on the display. Basic display symbols and keys description is shown on figure
below.
Figure 3.1: Display symbols and keys description
During measurement campaign various screens can be displayed. Most screens share
common labels and symbols. These are shown on figure below.
Figure 3.2: Common display symbols and labels during measurement campaign
MI 2892 Power Master Operating the instrument
23
3.1 Instrument status bar
Instruments status bar is placed on the top of the screen. It indicates different
instrument states. Icon descriptions are shown on table below.
Figure 3.3: Instrument status bar
Table 3.1: Instrument status bar description
Indicates battery charge level.
Indicates that charger is connected to the instrument. Batteries will be
charged automatically when charger is present.
Instrument is locked (see section 3.20.6 for details).
AD converter over range. Selected Nominal voltage or current clamps
range is too small.
09:19
Current time.
GPS module status (Optional accessory A 1355):
GPS module detected but reporting invalid time and position data.
(Searching for satellites or too weak satellite signal).
GPS time valid – valid satellite GPS time signal.
Internet connection status (see section 4.3 for details):
Internet connection is not available.
Instrument is connected to the internet and ready for communication.
Instrument is connected to the PowerView.
Recorder status:
General recorder is active, waiting for trigger.
General recorder is active, recording in progress.
Waveform recorder is active, waiting for trigger.
Waveform recorder is active, recording in progress.
Transient recorder is active, waiting for trigger.
Transient recorder is active, recording in progress.
Memory list recall. Shown screen is recalled from instrument memory.
MI 2892 Power Master Operating the instrument
24
3.2 Instrument keys
Instrument keyboard is divided into four subgroups:
- Function keys
- Shortcut keys
- Menu/zoom manipulation keys: Cursors, Enter, Escape
- Other keys: Light and Power on/off keys
Function keys are multifunctional. Their current
function is shown at the bottom of the screen and depends on selected instrument
function.
Shortcut keys are shown in table below. They provide quick access to the most
common instrument functions.
Table 3.2: Shortcut Keys functions
Shows UIF Meter screen from MEASUREMENT submenu
Shows Power meter screen from MEASUREMENT submenu
Shows Harmonics meter screen from MEASUREMENT submenu
Shows Connection Setup screen from MEASUREMENT SETUP
submenu
Shows Phase diagram screen from MEASUREMENT submenu
Hold key for 2 seconds to trigger WAVEFORM SNAPSHOT.
Instrument will record all measured parameters into file, which can be
then analysed by PowerView.
Hold key for 2 s to disable/enable sound signals.
Cursor, Enter and Escape keys are used for moving through instrument menu structure,
entering various parameters. Additionally, cursor keys are used for zooming graphs and
moving graph cursors.
key is used to set backlight intensity (low/high). Additionally, by holding key
pressed, user can enable/disable beeper.
key is used to switch On/off the instrument.
3.3 Instrument memory (microSD card)
Power master use microSD card for storing records. Prior instrument use, microSD card
should be formatted to a single partition FAT32 file system and inserted into the
instrument, as shown on figure below.
F1
F2 F3
F4
MI 2892 Power Master Operating the instrument
25
Figure 3.4: Inserting microSD card
1. Open instrument cover
2. Insert microSD card into a slot on the instrument (card should be putted
upside down, as shown on figure)
3. Close instrument cover
Note: Do not turn off the instrument while miroSD card is accessed:
- during record session
- observing recorded data in MEMORY LIST menu
Doing so may cause data corruption, and permanent data lost.
Note: SD Card should have single FAT32 partition. Do not use SD cards with multiple
partitions.
3.4 Instrument Main Menu
After powering on the instrument the “MAIN MENU” is displayed. From this menu all
instrument functions can be selected.
MI 2892 Power Master Operating the instrument
26
Figure 3.5: “MAIN MENU”
Table 3.3: Instrument Main menu
MEASUREMENT submenu. Provide access to various instrument
measurement screens
RECORDER submenu. Provide access to instrument recorders
configuration and storage.
MEASUREMENT SETUP submenu. Provide access to the
measurement settings.
GENERAL SETUP submenu. Provide access to the various instrument
settings.
Table 3.4: Keys in Main menu
Selects submenu.
Enters selected submenu.
3.4.1 Instrument submenus
By pressing ENTER key in Main menu, user can select one of four submenus:
Measurements – set of basic measurement screens,
Recorders – setup and view of various recordings,
Measurement setup – measurement parameters setup,
General setup – configuring common instrument settings.
List of all submenus with available functions are presented on following figures.
ENTER
MI 2892 Power Master Operating the instrument
27
Figure 3.6: Measurements submenu
Figure 3.7: Recorders submenu
Figure 3.8: Measurement setup submenu
MI 2892 Power Master Operating the instrument
28
Figure 3.9: General setup submenu
Table 3.5: Keys in submenus
Selects function within each submenu.
Enters selected function.
Returns to the “MAIN MENU”.
3.5 U, I, f
Voltage, current and frequency parameters can be observed in the “U, I, f” screens.
Measurement results can be viewed in a tabular (METER) or a graphical form (SCOPE,
TREND). TREND view is active only in RECORDING mode. See section 3.13 for
details.
3.5.1 Meter
By entering U, I, f option, the U, I, f – METER tabular screen is shown (see figures
below).
Figure 3.10: U, I, f meter phase table screens (L1, L2, L3, N)
ENTER
MI 2892 Power Master Operating the instrument
29
Figure 3.11: U, I, f meter summary table screens
In those screens on-line voltage and current measurements are shown. Descriptions of
symbols and abbreviations used in this menu are shown in table below.
Table 3.6: Instrument screen symbols and abbreviations
RMS
UL
IL
True effective value U
Rms
and I
Rms
THD
ThdU
ThdI
Total harmonic distortion THD
U
and THDI
CF Crest factor CFU and CFI
PEAK Peak value UPk and IPk
MAX Maximal U
Rms½
voltage and maximal I
Rms½
current, measured after
RESET (key: F2)
MIN Minimal U
Rms½
voltage and minimal I
Rms½
current, measured after
RESET (key: F2)
f Frequency on reference channel
Note: In case of overloading current or overvoltage on AD converter, icon will be
displayed in the status bar of the instrument.
MI 2892 Power Master Operating the instrument
30
Table 3.7: Keys in Meter screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
RESET
Resets MAX and MIN values (U
Rms½
and I
Rms½
).
1 2 3 N Δ
Shows measurements for phase L1.
1 2 3 N Δ
Shows measurements for phase L2.
1 2 3 N Δ
Shows measurements for phase L3.
1 2 3 N Δ
Shows measurements for neutral channel.
1 2 3 N Δ
Shows measurements for all phases.
1 2 3 N Δ
Shows measurements for all phase to phase voltages.
12 23 31 Δ
Shows measurements for phase to phase voltage L12.
12 23 31 Δ
Shows measurements for phase to phase voltage L23.
12 23 31 Δ
Shows measurements for phase to phase voltage L31.
12 23 31 Δ
Shows measurements for all phase to phase voltages.
METER
Switches to METER view.
SCOPE
Switches to SCOPE view.
TREND
Switches to TREND view (available only during recording).
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.5.2 Scope
Various combinations of voltage and current waveforms can be displayed on the
instrument, as shown below.
Figure 3.12: Voltage only waveform Figure 3.13: Current only waveform
F1
F2
F3
F4
MI 2892 Power Master Operating the instrument
31
Figure 3.14: Voltage and current
waveform (single mode)
Figure 3.15: Voltage and current
waveform (dual mode)
Table 3.8: Instrument screen symbols and abbreviations
U1, U2, U3, Un
True effective value of phase voltage:
U1, U2, U3, UN
U12, U23, U31 True effective value of phase-to-phase (line) voltage:
U12, U23, U3
I1, I2, I3, In True effective value of current:
I1, I2, I3, IN
Table 3.9: Keys in Scope screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
Selects which waveforms to show:
U I U,I U/I
Shows voltage waveform.
U I U,I U/I
Shows current waveform.
U I U,I U/I
Shows voltage and current waveform (single graph).
U I U,I U/I
Shows voltage and current waveform (dual graph).
Selects between phase, neutral, all-phases and line view:
1 2 3 N Δ
Shows waveforms for phase L1.
1 2 3 N Δ
Shows waveforms for phase L2.
1 2 3 N Δ
Shows waveforms for phase L3.
1 2 3 N Δ
Shows waveforms for neutral channel.
1 2 3 N Δ
Shows all phase waveforms.
1 2 3 N Δ
Shows all phase-to-phase waveforms.
12 23 31 Δ
Shows waveforms for phase L12.
12 23 31 Δ
Shows waveforms for phase L23.
12 23 31 Δ
Shows waveforms for phase L31.
12 23 31 Δ
Shows all phase waveforms.
F1
F2
F3
MI 2892 Power Master Operating the instrument
32
METER
Switches to METER view.
SCOPE
Switches to SCOPE view.
TREND
Switches to TREND view (available only during recording).
Selects which waveform to zoom (only in U/I or U+I).
Sets vertical zoom.
Sets horizontal zoom.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.5.3 Trend
While GENERAL RECORDER is active, TREND view is available (see section 3.13 for
instructions how to start recorder).
Voltage and current trends
Current and voltage trends can be observed by cycling function key F4 (METERSCOPE-TREND).
Figure 3.16: Voltage trend (all voltages)
Figure 3.17: Voltage trend (single
voltage)
Figure 3.18: Voltage and current trend Figure 3.19: Voltage and current trend
F4
ENTER
MI 2892 Power Master Operating the instrument
33
(single mode) (dual mode)
Figure 3.20: Trends of all currents Figure 3.21: Frequency trend
Table 3.10: Instrument screen symbols and abbreviations
U1, U2, U3,
Un, U12,
U23, U31
Maximal ( ), average ( ) and minimal ( ) value of phase RMS voltage
U1, U2, U3, U
N
or line voltage U12, U23, U
31
for time interval (IP)
selected by cursor.
I1, I2, I3, In
Maximal ( ), average ( ) and minimal ( ) value of current I1, I2, I3s, IN
for time interval (IP) selected by cursor.
f
Maximal ( ), active average ( ) and minimal ( ) value of frequency at
synchronization channel for time interval (IP) selected by cursor.
10.May.2013
12:02:00
Timestamp of interval (IP) selected by cursor.
32m 00s
Current GENERAL RECORDER time
(d - days, h - hours, m - minutes, s - seconds)
Table 3.11: Keys in Trend screens
Selects between the following options:
U I f U,I U/I
Shows voltage trend.
U I f U,I U/I
Shows current trend.
U I f U,I U/I
Shows frequency trend.
U I f U,I U/I
Shows voltage and current trend (single mode).
U I f U,I U/I
Shows voltage and current trend (dual mode).
Selects between phases, neutral channel, all-phases view:
1 2 3 N
Shows trend for phase L1.
1 2 3 N
Shows trend for phase L2.
1 2 3 N
Shows trend for phase L3.
1 2 3 N
Shows trend for neutral channel.
1 2 3 N
Shows all phases trends.
12 23 31 Δ
Shows trend for phases L12.
F2
F3
MI 2892 Power Master Operating the instrument
34
12 23 31 Δ
Shows trend for phases L23.
12 23 31 Δ
Shows trend for phases L31.
12 23 31 Δ
Shows all phase-to-phase trends.
METER
Switches to METER view.
SCOPE
Switches to SCOPE view.
TREND
Switches to TREND view.
Moves cursor and selects time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
3.6 Power
In POWER screens instrument shows measured power parameters. Results can be
seen in a tabular (METER) or a graphical form (TREND). TREND view is active only
while GENERAL RECORDER is active. See section 3.13 for instructions how to start
recorder. In order to fully understand meanings of particular power parameter see
sections 5.1.5.
3.6.1 Meter
By entering POWER option from Measurements submenu the tabular POWER
(METER) screen is shown (see figure below).
Figure 3.22: Power measurements
summary (combined)
Figure 3.23: Power measurements
summary (fundamental)
Figure 3.24: Detailed power
measurements at phase L1
Figure 3.25: Detailed total power
measurements
F4
MI 2892 Power Master Operating the instrument
35
Description of symbols and abbreviations used in POWER (METER) screens are shown
in table below.
Table 3.12: Instrument screen symbols and abbreviations
P
Depending on the screen position:
In Combined column: Instantaneous combined (fundamental and
nonfundamental) active power (P1, P2, P3, P
tot
,)
In Fundamental column: Instantaneous fundamental active
power (Pfund1, Pfund2, Pfund3)
N
Instantaneous combined (fundamental and nonfundamental)
nonactive power (N1, N2, N3, N
tot
,)
Q
Instantaneous fundamental reactive power (Qfund1, Qfund2,
Qfund3, Q+fund
tot
)
S
Depending on the screen position:
In Combined column: Instantaneous combined (fundamental and
nonfundamental) apparent power (S1, S2, S3)
In Fundamental column: Instantaneous fundamental active
power (Sfund1, Sfund2, Sfund3)
P+
Positive sequence of total active fundamental power (P
+
tot
)
Q+
Positive sequence of total reactive fundamental power (Q
+
tot
)
S+
Positive sequence of total apparent fundamental power (S
+
tot
)
PF+
Positive sequence power factor (fundamental, total)
Se
Combined (fundamental and nonfundamental) total effective
apparent power (Se
tot
)
Sɴ
Phase nonfundamental apparent power (Sɴ
1
, Sɴ2, Sɴ3)
Seɴ
Total effective nonfundamental apparent power (Seɴ
tot
)
Dı
Phase current distortion power (Dı1, Dı2, Dı3)
Deı
Total effective current distortion power (Deı
tot
)
Dᴠ
Phase voltage distortion power (Dᴠ1, Dᴠ2, Dᴠ3)
Deᴠ
Total effective voltage distortion power (Deᴠ
tot
)
Pн
Phase and total harmonic active power (P
H1
+
,P
H
2
+
,P
H
3
+
,P
Htot
)
PF
Instantaneous phase combined (fundamental and
nonfundamental) power factor (PF1, PF2, PF3)
PFe Instantaneous total effective combined (fundamental and
nonfundamental) power factor (PFe)
DPF
Instantaneous phase fundamental power factor (
DPF1, DPF2,
DPF3,)
Harmonic Pollution Harmonic pollution according to the standard IEEE 1459
Load unbalance Load unbalance according to the standard IEEE 1459
MI 2892 Power Master Operating the instrument
36
Table 3.13: Keys in Power (METER) screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
VIEW
Switches between Combined, Fundamental and
Nonfundamental view.
1 2 3 T
Shows measurements for phase L1.
1 2 3 T
Shows measurements for phase L2.
1 2 3 T
Shows measurements for phase L3.
1 2 3 T
Shows brief view on measurements on all phases in a single
screen.
1 2 3 T
Shows measurement results for TOTAL power
measurements.
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.6.2 Trend
During active recording TREND view is available (see section 3.13 for instructions how
to start GENERAL RECORDER).
Figure 3.26: Power trend screen
Table 3.14: Instrument screen symbols and abbreviations
P1±, P2±,
P3±, Pt±
View: Combined power
Maximal ( ), average ( ) and minimal ( ) value of consumed
(P
1
+
, P
2
+
, P
3
+
, P
tot
+
) or generated (P
1
-
, P
2
-
, P
3
-
, P
tot
-
) active
combined power for time interval (IP) selected by cursor.
P1±, P2±,
P3±, P+±
View: Fundamental power
Maximal ( ), average ( ) and minimal ( ) value of consumed
(Pfund
1
+
, Pfund
2
+
, Pfund
3
+
, P+
tot
+
) or generated (Pfund
1
-
, Pfund2,
Pfund
3
, P+
tot
-
) active fundamental power for time interval (IP)
selected by cursor.
F1
F2
F3
F4
MI 2892 Power Master Operating the instrument
37
Ni1±, Ni2±,
Ni3±, Nit±
Maximal ( ), average ( ) and minimal ( ) value of consumed
(N
1ind
+
, N
2ind
+
, N
3ind
+
, N
totind
+
) or generated (N
1ind
-
, N
2ind
-
, N
3ind
-
,
N
totind
-
) inductive combined nonactive power for time interval (IP)
selected by cursor.
Nc1±, Nc2±,
Nc3±, Nct±
Maximal ( ), average ( ) and minimal ( ) value of consumed
(N
1cap
+
, N
2cap
+
, N
3cap
+
, N
totcap
+
) or generated (N
1cap
-
, N
2cap
-
, N
3cap
-
,
N
totcap
-
) capacitive combined nonactive power for time interval (IP)
selected by cursor.
S1, S2, S3, Se
View: Combined power Maximal ( ), average ( ) and minimal (
) value of combined apparent power (S1, S2, S3, Se
tot
) for time
interval (IP) selected by cursor.
S1, S2, S3, S+
View: Fundamental power
Maximal ( ), average ( ) and minimal ( ) value of combined
apparent power (Sfund1, Sfund2, Sfund3, S
+
tot
) for time interval
(IP) selected by cursor.
PFi1±, PFi2±,
PFi3±, PFit±
Maximal ( ), average ( ) and minimal ( ) value of inductive
power factor (1st quadrant: PF
1ind
+
, PF
2ind
+
, PF
3ind
+
, PF
totind
+
and 3rd
quadrant: PF
1ind
-
, PF
2ind
-
, PF
3ind
-
, PF
totind
-
) for time interval (IP)
selected by cursor.
PFc1±, PFc2±,
PFc3±, PFct±
Maximal ( ), average ( ) and minimal ( ) value of capacitive
power factor (4th quadrant: PF
1cap
+
, PF
2cap
+
, PF
3cap
+
, PF
totcap
+
and
2nd quadrant: PF
1cap
-
, PF
2cap
-
, PF
3cap
-
, PF
totcap
-
) for time interval
(IP) selected by cursor.
Qi1±, Qi2±, Qi3±,
Q+i±
Maximal ( ), average ( ) and minimal ( ) value of consumed
(Q
1ind
+
, Q
2ind
+
, Q
3ind
+
, Q
+
totind
+
) or generated (Q
1ind
-
, Q
2ind
-
, Q
3ind
-
,
Q
+
totind
-
) fundamental reactive inductive power for time interval (IP)
selected by cursor.
Qc1±, Qc2±,
Qc3±, Q+c±
Maximal ( ), average ( ) and minimal ( ) value of consumed
(Q
1cap
+
, Q
2cap
+
, Q
3cap
+
, Q
+
captot
+
) or generated (Q
1cap
-
, Q
2cap
-
, Q
3cap
-
,
Q
+
captot
-
) fundamental reactive capacitive power for time interval
(IP) selected by cursor.
DPFi1±,
DPFi2±,
DPFi3±
DPF+i±
Maximal ( ), average ( ) and minimal ( ) value of inductive
displacement power factor (1
st
quadrant: DPF
1ind
+
, DPF
2ind
+
,
DPF
3ind
+
, DPF
totind
+
, and 3rd quadrant: DPF
1ind
-
, DPF
2ind
-
, DPF
3ind
-
DPF
totind
-
,) for time interval (IP) selected by cursor.
DPFc1±,
DPFc2±,
DPFc3±
DPF+c±
Maximal ( ), average ( ) and minimal ( ) value of capacitive
displacement power factor (4th quadrant: DPF
1cap
+
, DPF
2cap
+
,
DPF
3cap
+
, DPF
totcap
+
, and 2nd quadrant: DPF
1cap
-
, DPF
2cap
-
,
DPF
3cap
-
, DPF
totcap
+
) for time interval (IP) selected by cursor.
Sn1, Sn2,
Sn3, Sen
Maximal ( ), average ( ) and minimal ( ) value of consumed or
generated nonfundamental apparent power (Sɴ1, Sɴ2, Sɴ3, Seɴ
tot
)
for time interval (IP) selected by cursor.
Di1, Di2,
Di3, Dei
Maximal ( ), average ( ) and minimal ( ) value of consumed or
generated phase current distortion power (Dı
1
, Dı2, Dı3, Deı
tot
) for
time interval (IP) selected by cursor.
Dv1, Dv2,
Dv3, Dev
Maximal ( ), average ( ) and minimal ( ) value of consumed or
generated phase voltage distortion power (Dv1, Dv2, Dv3, Dev
tot
)
for time interval (IP) selected by cursor.
MI 2892 Power Master Operating the instrument
38
Ph1±, Ph2±,
Ph3±, Pht±
Maximal ( ), average ( ) and minimal ( ) value of consumed
(P
H1
+
, P
H2
+
, P
H3
+
, P
Htot
+
) or generated (P
H1
-
, P
H2
-
, P
H3
-
, P
Htot
-
) active
harmonic power for time interval (IP) selected by cursor.
Table 3.15: Keys in Power (TREND) screens
VIEW
Selects which measurement should instrument
represent on graph:
- Consumed or Generated
Measurements related to consumed (suffix: +)
or generated power (suffix: -).
- Combined, Fundamental or Nonfundamental
Measurement related to fundamental power,
nonfundamental power or combined.
Keys in VIEW window:
Selects option.
Confirms selected option.
Exits selection window without
change.
If Combined power is selected:
P Ni Nc S PFi Pfc
Shows combined active power trend.
P Ni Nc S PFi Pfc
Shows combined inductive nonactive power trend.
P Ni Nc S PFi Pfc
Shows combined capacitive nonactive power trend.
P Ni Nc S PFi Pfc
Shows combined apparent power trend.
P Ni Nc S PFi Pfc
Shows inductive power factor trend.
P Ni Nc S Pfi PFc
Shows capacitive power factor trend.
If Fundamental power is selected:
P Qi Qc S DPFi DPfc
Shows fundamental active power trend.
P Qi Qc S DPFi DPfc
Shows fundamental inductive reactive power trend.
P Qi Qc S DPFi DPfc
Shows fundamental capacitive reactive power trend.
P Qi Qc S DPFi DPfc
Shows fundamental apparent power trend.
P Qi Qc S DPFi DPfc
Shows inductive displacement power factor trend.
P Qi Qc S DPfi DPFc
Shows capacitive displacement power factor trend.
If Nonfundamental power is selected:
Sn Di Dv Ph
Shows nonfundamental apparent power trend.
Sn Di Dv Ph
Shows nonfundamental current distortion power.
F1
ENTER
F2
MI 2892 Power Master Operating the instrument
39
Sn Di Dv Ph
Shows nonfundamental voltage distortion power.
Sn Di Dv Ph
Shows nonfundamental active power.
Selects between phase, all-phases and Total power
view:
1 2 3 T
Shows power parameters for phase L1.
1 2 3 T
Shows power parameters for phase L2.
1 2 3 T
Shows power parameters for phase L3.
1 2 3 T
Shows power parameters for phases L1, L2 and L3 on
the same graph.
1 2 3 T
Shows Total power parameters.
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Moves cursor and selects time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
3.7 Energy
3.7.1 Meter
Instrument shows status of energy counters in energy menu. Results can be seen in a
tabular (METER) form. Energy measurement is active only if GENERAL RECORDER is
active. See section 3.13 for instructions how to start GENERAL RECORDER. The
meter screens are shown on figures below.
Figure 3.27: Energy counters screen
Table 3.16: Instrument screen symbols and abbreviations
Ep+
Ep-
Consumed (+) phase (Ep
1
+
, Ep
2
+
, Ep
3
+
) or total (Ep
tot
+
) active energy
Generated (-) phase (Ep
1
-
, Ep
2
-
, Ep
3
-
) or total (Ep
tot
-
) active energy
Eq+
Eq-
Consumed (+) phase (Eq
1
+
, Eq
2
+
, Eq
3
+
) or total (Eq
tot
+
) fundamental
reactive energy
Generated (-) phase (Eq
1
-
, Eq
2
-
, Eq
3
-
) or total (Eq
tot
-
) fundamental reactive
energy
F3
F4
MI 2892 Power Master Operating the instrument
40
Start Recorder start time and date
Duration Recorder elapsed time
Table 3.17: Keys in Energy (METER) screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
TOT LAST CUR
Shows energy registers for whole record.
TOT LAST CUR
Shows energy registers for last interval.
TOT LAST CUR
Shows energy registers for current interval.
1 2 3 T
Shows energy parameters for phase L1.
1 2 3 T
Shows energy parameters for phase L2.
1 2 3 T Shows energy parameters for phase L3.
1 2 3 T
Shows all phases energy.
1 2 3 T
Shows energy parameters for Totals.
METER
Switches to METER view.
TREND
Switches to TREND view.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.7.2 Trend
TREND view is available only during active recording (see section 3.13 for instructions
how to start GENERAL RECORDER).
Figure 3.28: Energy trend screen
Table 3.18: Instrument screen symbols and abbreviations
Ep+
Ep-
Consumed (+) phase (Ep
1
+
, Ep
2
+
, Ep
3
+
) or total (Ep
tot
+
) active energy
Generated (-) phase (Ep
1
-
, Ep
2
-
, Ep
3
-
) or total (Ep
tot
-
) active energy
Eq+
Eq-
Consumed (+) phase (Eq
1
+
, Eq
2
+
, Eq
3
+
) or total (Eq
tot
+
) fundamental
reactive energy
Generated (-) phase (Eq
1
-
, Eq
2
-
, Eq
3
-
) or total (Eq
tot
-
) fundamental reactive
energy
F1
F2
F3
F4
MI 2892 Power Master Operating the instrument
41
Start Recorder start time and date
Duration Recorder elapsed time
Table 3.19: Keys in Energy (TREND) screens
Ep+ Eq+ Ep- Eq-
Shows active consumed energy for time interval (IP)
selected by cursor.
Ep+ Eq+ Ep- Eq-
Shows reactive consumed energy for time interval (IP)
selected by cursor.
Ep+ Eq+ Ep- Eq-
Shows active generated energy for time interval (IP)
selected by cursor.
Ep+ Eq+ Ep- Eq-
Shows reactive generated energy for time interval (IP)
selected by cursor.
1 2 3 T Shows energy records for phase L1.
1 2 3 T
Shows energy records for phase L2.
1 2 3 T
Shows energy records for phase L3.
1 2 3 T
Shows all phases energy records.
1 2 3 T
Shows energy records for Totals.
METER
Switches to METER view.
TREND
Switches to TREND view.
Returns to the “MEASUREMENTS” submenu.
3.8 Harmonics / interharmonics
Harmonics presents voltage and current signals as a sum of sinusoids of power
frequency and its integer multiples. Sinusoidal wave with frequency k-times higher than
fundamental (k is an integer) is called harmonic wave and is denoted with amplitude
and a phase shift (phase angle) to a fundamental frequency signal. If a signal
decomposition with Fourier transformation results with presence of a frequency that is
not integer multiple of fundamental, this frequency is called interharmonic frequency and
component with such frequency is called interharmonic. See 5.1.7 for details.
3.8.1 Meter
By entering HARMONICS option from Measurements submenu the tabular
HARMONICS (METER) screen is shown (see figure below). In this screens voltage and
current harmonics or interharmonics and THD are shown.
F2
F3
F4
MI 2892 Power Master Operating the instrument
42
Figure 3.29: Harmonics and interharmonics (METER) screens
Description of symbols and abbreviations used in METER screens are shown in table
below.
Table 3.20: Instrument screen symbols and abbreviations
THD Total voltage / current harmonic distortion THDU and THDI in % of
fundamental voltage / current harmonic or in RMS V, A.
DC Voltage or current DC component in % of fundamental voltage /
current harmonic or in RMS V, A.
h1 … h50 n-th harmonic voltage Uhn or current Ihn component in % of
fundamental voltage / current harmonic or in RMS V, A.
ih0 … ih50 n-th interharmonic voltage Uihn or current Iihn component in % of
fundamental voltage / current harmonic or in RMS V, A.
Table 3.21: Keys in Harmonics / interharmonics (METER) screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
VIEW
Switches view between Harmonics and Interharmonics.
Switches units between:
- RMS (Volts ,Amperes)
- % of fundamental harmonic
Keys in VIEW window:
Selects option.
Confirms selected option.
Exits selection window without
change.
Selects between single phase, neutral, all-phases and line
harmonics / interharmonics view.
1 2 3 N Δ
Shows harmonics / interharmonics components for phase L1.
F1
F2
ENTER
F3
MI 2892 Power Master Operating the instrument
43
1 2 3 N Δ
Shows harmonics / interharmonics components for phase L2.
1 2 3 N Δ
Shows harmonics / interharmonics components for phase L3.
1 2 3 N Δ
Shows harmonics / interharmonics components for neutral
channel.
1 2 3 N Δ
Shows harmonics / interharmonics components for all phases
on single screen.
1 2 3 N Δ
Shows harmonics / interharmonics components for phase-tophase voltages.
12 23 31 Δ
Shows harmonics / interharmonics components for phases
L12.
12 23 31 Δ
Shows harmonics / interharmonics components for phases
L23.
12 23 31 Δ
Shows harmonics / interharmonics components for phases
L31.
12 23 31 Δ
Shows harmonics / interharmonics components for phase-tophase voltages.
METER
Switches to METER view.
BAR
Switches to BAR view.
TREND
Switches to TREND view (available only during recording).
Shifts through harmonic / interharmonic components.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.8.2 Histogram (Bar)
Bar screen displays dual bar graphs. The upper bar graph shows voltage harmonics
and the lower bar graph shows current harmonics.
Figure 3.30: Harmonics histogram screen
Description of symbols and abbreviations used in BAR screens are shown in table
below.
F4
MI 2892 Power Master Operating the instrument
44
Table 3.22: Instrument screen symbols and abbreviations
Ux h01 … h50 Voltage harmonic / interharmonic component in V
RMS
and in % of
fundamental voltage
Ix h01 … h50
Current harmonic / interharmonic component in A
RMS
and in % of
fundamental current
Ux DC DC voltage in V and in % of fundamental voltage
Ix DC DC current in A and in % of fundamental current
Ux THD Total voltage harmonic distortion THDU in V and in % of fundamental
voltage
Ix THD Total current harmonic distortion THDI in A
RMS
and in % of
fundamental current
Table 3.23: Keys in Harmonics / interharmonics (BAR) screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
VIEW
Switches view between harmonics and interharmonics.
Keys in VIEW window:
Selects option.
Confirms selected option.
Exits selection window without
change.
Selects between single phases and neutral channel
harmonics / interharmonics bars.
1 2 3 N
Shows harmonics / interharmonics components for phase L1.
1 2 3 N
Shows harmonics / interharmonics components for phase L2.
1 2 3 N
Shows harmonics / interharmonics components for phase L3.
1 2 3 N
Shows harmonics / interharmonics components for neutral
channel.
12 23 31
Shows harmonics / interharmonics components for phase
L12.
12 23 31
Shows harmonics / interharmonics components for phases
L23.
12 23 31
Shows harmonics / interharmonics components for phases
L31.
METER
Switches to METER view.
BAR
Switches to BAR view.
TREND
Switches to TREND view (available only during recording).
Scales displayed histogram by amplitude.
F1
F2
ENTER
F3
F4
MI 2892 Power Master Operating the instrument
45
Scrolls cursor to select single harmonic / interharmonic bar.
Toggles cursor between voltage and current histogram.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.8.3 Trend
During active GENERAL RECORDER, TREND view is available (see section 3.13 for
instructions how to start GENERAL RECORDER). Voltage and current harmonic /
interharmonic components can be observed by cycling function key F4 (METER-BARTREND).
Figure 3.31: Harmonics and interharmonics trend screen
Table 3.24: Instrument screen symbols and abbreviations
thdU Maximal ( ) and average ( ) value of total voltage harmonic distortion
THD
U
for selected phase
thdI Maximal ( ) and average ( ) value of total current harmonic distortion
THDI for selected phase
Udc
Maximal ( ) and average ( ) value of DC voltage component for
selected phase
Idc Maximal ( ) and average ( )value of selected DC current component
ENTER
MI 2892 Power Master Operating the instrument
46
for selected phase
Uh/Uih
Maximal ( ) and average ( ) value for selected n-th voltage harmonic
/ interharmonic component for selected phase
Ih/Iih
Maximal ( ) and average ( )value of selected n-th current harmonic /
interharmonic component for selected phase
Table 3.25: Keys in Harmonics / interharmonics (TREND) screens
VIEW
Switches between harmonics or interharmonics view.
Switches measurement units between RMS V,A or % of
fundamental harmonic.
Selects harmonic number for observing.
Keys in VIEW window:
Selects option.
Confirms selected option.
Exits selection window without
change.
Selects between single phases and neutral channel harmonics /
interharmonics trends.
1 2 3 N
Shows selected harmonics / interharmonics components for
phase L1.
1 2 3 N
Shows selected harmonics / interharmonics components for
phase L2.
1 2 3 N
Shows selected harmonics / interharmonics components for
phase L3.
1 2 3 N
Shows selected harmonics / interharmonics components for
neutral channel.
12 23 31
Shows selected harmonics / interharmonics components for
phases L12.
12 23 31
Shows selected harmonics / interharmonics components for
phases L23.
12 23 31
Shows selected harmonics / interharmonics components for
phases L31.
METER
Switches to METER view.
BAR
Switches to BAR view.
TREND
Switches to TREND view (available only during recording).
F2
ENTER
F3
F4
MI 2892 Power Master Operating the instrument
47
Moves cursor and select time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
3.9 Flickers
Flickers measure the human perception of the effect of amplitude modulation on the
mains voltage powering a light bulb. In Flickers menu instrument shows measured
flicker parameters. Results can be seen in a tabular (METER) or a graphical form
(TREND) - which is active only while GENERAL RECORDER is active. See section
3.13 for instructions how to start recording. In order to understand meanings of
particular parameter see section 5.1.8.
3.9.1 Meter
By entering FLICKERS option from MEASUREMENTS submenu the FLICKERS tabular
screen is shown (see figure below).
Figure 3.32: Flickers table screen
Description of symbols and abbreviations used in METER screen is shown in table
below. Note that Flickers measurement intervals are synchronised to real time clock,
and therefore refreshed on minute, 10 minutes and 2 hours intervals.
Table 3.26: Instrument screen symbols and abbreviations
Urms True effective value U1, U2, U3, U12, U23, U31
Pinst,max Maximal instantaneous flicker for each phase refreshed each 10 seconds
Pst(1min) Short term (1 min) flicker P
st1min
for each phase measured in last minute
Pst Short term (10 min) flicker Pst for each phase measured in last 10 minutes
Plt Long term flicker (2h) Pst for each phase measured in last 2 hours
Table 3.27: Keys in Flickers (METER) screen
HOLD
Holds measurement on display.
RUN
Runs held measurement.
F1
MI 2892 Power Master Operating the instrument
48
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.9.2 Trend
During active recording TREND view is available (see section 3.13 for instructions how
to start recording). Flicker parameters can be observed by cycling function key F4
(METER -TREND). Note that Flicker meter recording intervals are determinate by
standard IEC 61000-4-15. Flicker meter therefore works independently from chosen
recording interval in GENERAL RECORDER.
Figure 3.33: Flickers trend screen
MI 2892 Power Master Operating the instrument
49
Table 3.28: Instrument screen symbols and abbreviations
Pst1m1,
Pst1m2,
Pst1m3,
Pst1m12,
Pst1m23,
Pst1m31
Maximal ( ), average ( ) and minimal ( ) value of 1-minute short
term flicker P
st(1min)
for phase voltages U1, U2, U3 or line voltages
U12, U23, U31
Pst1,
Pst2,
Pst3,
Pst12,
Pst23,
Pst31
Maximal ( ), average ( ) and minimal ( ) value of 10-minutes
short term flicker P
st
for phase voltages U1, U2, U3 or line voltages
U12, U23, U31
Plt1,
Plt2,
Plt3,
Plt12,
Plt23,
Plt31
Maximal ( ), average ( ) and minimal ( ) value of 2-hours long
term flicker P
lt
in phase voltages U1, U2, U3 or line voltages U12,
U23, U31
Table 3.29: Keys in Flickers (TREND) screens
Selects between the following options:
Pst Plt Pstmin
Shows 10 min short term flicker Pst.
Pst Plt Pstmin
Shows long term flicker Plt.
Pst Plt Pstmin
Shows 1 min short term flicker P
st1min
.
Selects between trending various parameters:
1 2 3
Shows selected flicker trends for phase L1.
1 2 3
Shows selected flicker trends for phase L2.
1 2 3
Shows selected flicker trends for phase L3.
1 2 3
Shows selected flicker trends for all phases (average
only).
12 23 31 Δ
Shows selected flicker trends for phases L12.
12 23 31 Δ
Shows selected flicker trends for phases L23.
12 23 31 Δ
Shows selected flicker trends for phases L31.
12 23 31 Δ
Shows selected flicker trends for all phases (average
only).
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Moves cursor and selects time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
F2
F3
F4
MI 2892 Power Master Operating the instrument
50
3.10 Phase Diagram
Phase diagram graphically represent fundamental voltages, currents and phase angles
of the network. This view is strongly recommended for checking instrument connection
before measurement. Note that most measurement issues arise from wrongly
connected instrument (see 4.1 for recommended measuring practice). On phase
diagram screens instrument shows:
Graphical presentation of voltage and current phase vectors of the measured
system,
Unbalance of the measured system.
3.10.1 Phase diagram
By entering PHASE DIAGRAM option from MEASUREMENTS submenu, the following
screen is shown (see figure below).
Figure 3.34: Phase diagram screen
Table 3.30: Instrument screen symbols and abbreviations
U1, U2, U3
Fundamental voltages Ufund
1
, Ufund2, Ufund3 with relative phase
angle to Ufund
1
U12, U23, U31
Fundamental voltages Ufund
12
, Ufund23, Ufund31 with relative phase
angle to Ufund
12
I1, I2, I3
Fundamental currents Ifund1, Ifund2, Ifund3 with relative phase angle
to Ufund1 or Ufund12
Table 3.31: Keys in Phase diagram screen
HOLD
Holds measurement on display.
RUN
Runs held measurement.
U I
I U
Selects voltage for scaling (with cursors).
Selects current for scaling (with cursors).
METER
Switches to PHASE DIAGRAM view.
UNBAL.
Switches to UNBALANCE DIAGRAM view.
TREND
Switches to TREND view (available only during recording).
F1
F2
F4
MI 2892 Power Master Operating the instrument
51
Scales voltage or current phasors.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.10.2 Unbalance diagram
Unbalance diagram represents current and voltage unbalance of the measuring system.
Unbalance arises when RMS values or phase angles between consecutive phases are
not equal. Diagram is shown on figure below.
Figure 3.35: Unbalance diagram screen
Table 3.32: Instrument screen symbols and abbreviations
U0
I0
Zero sequence voltage component U
0
Zero sequence current component I
0
U+
I+
Positive sequence voltage component U
+
Positive sequence current component I
+
UI-
Negative sequence voltage component U
-
Negative sequence current component I
-
u-
i-
Negative sequence voltage ratio u
-
Negative sequence current ratio i-
u0
i0
Zero sequence voltage ratio u
0
Zero sequence current ratio i0
MI 2892 Power Master Operating the instrument
52
Table 3.33: Keys in Unbalance diagram screens
HOLD
Holds measurement on display.
RUN
Runs held measurement.
U I
I U
Shows voltage unbalance measurement and selects voltage
for scaling (with cursors)
Shows current unbalance measurement and selects current
for scaling (with cursors)
METER
Switches to PHASE DIAGRAM view.
UNBAL.
Switches to UNBALANCE DIAGRAM view.
TREND
Switches to TREND view (available only during recording).
Scales voltage or current phasors.
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.10.3 Unbalance trend
During active recording UNBALANCE TREND view is available (see section 3.13 for
instructions how to start GENERAL RECORDER).
Figure 3.36: Symmetry trend screen
Table 3.34: Instrument screen symbols and abbreviations
u-
Maximal ( ), average ( ) and minimal ( ) value of negative
sequence voltage ratio u-
u0
Maximal ( ), average ( ) and minimal ( ) value of zero sequence
voltage ratio u0
i-
Maximal ( ), average ( ) and minimal ( ) value of negative
sequence current ratio i-
i0 Maximal ( ), average ( ) and minimal ( ) value of zero sequence
current ratio i
0
U+ Maximal ( ), average ( ) and minimal ( ) value of positive sequence
voltage U+
U- Maximal ( ), average ( ) and minimal ( ) value of negative
sequence voltage U-
F1
F2
F4
MI 2892 Power Master Operating the instrument
53
U0 Maximal ( ), average ( ) and minimal ( ) value of zero sequence
voltage U0
I+ Maximal ( ), average ( ) and minimal ( ) value of positive sequence
current I+
I- Maximal ( ), average ( ) and minimal ( ) value of negative
sequence current I-
I0 Maximal ( ), average ( ) and minimal ( ) value of zero sequence
current I0
Table 3.35: Keys in Unbalance trend screens
U+ U- U0
I+ I- I0
u+ u0 i+ i0
Shows selected voltage and current unbalance
measurement (U+, U-, U0, I+, I-, I0, u-, u0, i-, i0).
METER
Switches to PHASE DIAGRAM view.
UNBAL.
Switches to UNBALANCE DIAGRAM view.
TREND
Switches to TREND view (available only during recording).
Moves cursor and selects time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
3.11 Temperature
Power Master instrument is capable of measuring and recording temperature with
Temperature probe A 1354. Temperature is expressed in both units, Celsius and
Fahrenheit degrees. See following sections for instructions how to start recording. In
order to learn how to set up neutral clamp input with the temperature sensor, see
section 4.2.4.
3.11.1 Meter
Figure 3.37: Temperature meter screen
Table 3.36: Instrument screen symbols and abbreviations
0
C Current temperature in Celsius degrees
0
F Current temperature in Fahrenheit degrees
F2
F4
MI 2892 Power Master Operating the instrument
54
Table 3.37: Keys in Temperature meter screen
HOLD
Holds measurement on display.
RUN
Runs held measurement.
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
3.11.2 Trend
Temperature measurement TREND can be viewed during the recording in progress.
Records containing temperature measurement can be viewed from Memory list and by
using PC software PowerView v3.0.
Figure 3.38: Temperature trend screen
Table 3.38: Instrument screen symbols and abbreviations
T:
Maximal ( ), average ( ) and minimal ( ) temperature value for last
recorded time interval (IP)
Table 3.39: Keys in Temperature trend screens
0
C
0
F
Shows temperature in Celsius degrees.
0
C
0
F
Shows temperature in Fahrenheit degrees.
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Returns to the “MEASUREMENTS” submenu.
3.12 Signalling
Mains signalling voltage, called “ripple control signal” in certain applications, is a burst of
signals, often applied at a non-harmonic frequency, that remotely control industrial
equipment, revenue meters, and other devices. Before observing signalling
measurements, user should set-up signalling frequencies in signalling setup menu (see
section 3.19.4).
F1
F4
F2
F4
MI 2892 Power Master Operating the instrument
55
Results can be seen in a tabular (METER) or a graphical form (TREND) - which is
active only while GENERAL RECORDER is active. See section 3.13 for instructions
how to start recording. In order to understand meanings of particular parameter see
section 5.1.8.
3.12.1 Meter
By entering SIGNALLING option from MEASUREMENTS submenu the SIGNALLING
tabular screen is shown (see figure below).
Figure 3.39: Signalling meter screen
Description of symbols and abbreviations used in METER screen is shown in table
below.
Table 3.40: Instrument screen symbols and abbreviations
Sig1
316.0 Hz
True effective value signal voltage (U
Sig1
, U
Sig2
, U
Sig3
, U
Sig12
, U
Sig23
,
U
Sig31
) for a user-specified carrier frequency (316.0 Hz in shown
example) expressed in Volts or percent of fundamental voltage
Sig2
1060.0 Hz
True effective value signal voltage (U
Sig1
, U
Sig2
, U
Sig3
, U
Sig12
, U
Sig23
,
U
Sig31
) for a user-specified carrier frequency (1060.0 Hz in shown
example) expressed in Volts or percent of fundamental voltage
RMS True effective value of phase or phase to phase voltage U
Rms (U1
, U2,
U
3
, U12, U23, U31)
Table 3.41: Keys in Signalling (METER) screen
HOLD
Holds measurement on display.
RUN
Runs held measurement.
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Triggers Waveform snapshot.
Returns to the “MEASUREMENTS” submenu.
F1
F4
MI 2892 Power Master Operating the instrument
56
3.12.2 Trend
During active recording TREND view is available (see section 3.13 for instructions how
to start recording). Signalling parameters can be observed by cycling function key F4
(METER -TREND).
Figure 3.40: Signalling trend screen
Table 3.42: Instrument screen symbols and abbreviations
Usig1, Usig2, Usig3,
Usig12, Usig23, Usig31
Maximal ( ), average ( ) and minimal ( ) value of (U
Sig1
,
U
Sig2
, U
Sig3
, U
Sig12
, U
Sig23
, U
Sig31
) signal voltage for a user-
specified Sig1/Sig2 frequency (Sig1 = 316.0 Hz / Sig2 =
1060.0 Hz in shown example).
14.Nov.2013
13:50:00
Timestamp of interval (IP) selected by cursor.
22h 25m 00s
Current GENERAL RECORDER time (Days
hours:min:sec)
Table 3.43: Keys in Signalling (TREND) screen
Selects between the following options:
f1 f2
Shows signal voltage for a user-specified signalling
frequency (Sig1).
f1 f2
Shows signal voltage for a user-specified signalling
frequency (Sig2).
Selects between trending various parameters:
1 2 3
Shows signalling for phase 1
1 2 3
Shows signalling for phase 2
1 2 3
Shows signalling for phase 3
1 2 3
Shows signalling for all phases (average only)
12 23 31 Δ
Shows signalling for phase to phase voltage L12.
12 23 31 Δ
Shows signalling for phase to phase voltage L23.
12 23 31 Δ
Shows signalling for phase to phase voltage L31.
12 23 31 Δ
Shows signalling for all phase to phase voltages (average
only).
F2
F3
MI 2892 Power Master Operating the instrument
57
METER
Switches to METER view.
TREND
Switches to TREND view (available only during recording).
Moves cursor and select time interval (IP) for observation.
Returns to the “MEASUREMENTS” submenu.
3.13 General Recorder
Power Master has ability to record measured data in the background. By entering
GENERAL RECORDER option from RECORDERS submenu, recorder parameters can
be customized in order to meet criteria about interval, and the number of signals for the
recording campaign. The following screen is shown:
Figure 3.41: General recorder setup screen
Description of General recorder settings is given in the following table:
Table 3.44: General recorder settings description and screen symbols
General recorder is active, waiting for trigger
General recorder is active, recording in progress
Interval
Select General recorder aggregation interval. The smaller
the interval is, more measurements will be used for the
same record duration.
Include events
Select whether events are included in the record.
Include alarms
Select whether alarms are included in the record.
Start time
Define start time of recording:
Manual, pressing function key F1
At the given time and date.
Table 3.45: Keys in General recorder setup screen
START
STOP
Starts the recorder.
Stops the recorder.
Enters recorder starting date/time setup.
F4
F1
ENTER
MI 2892 Power Master Operating the instrument
58
Keys in Set start time window:
Selects parameter to be changed.
Modifies parameter.
Confirms selected option.
Exits Set start time window without modifications.
Selects parameter to be changed.
Modifies parameter.
Returns to the “RECORDERS” submenu.
3.14 Waveform/inrush recorder
Waveform recording is a powerful tool for troubleshooting and capturing current and
voltage waveforms and inrushes. Waveform recorder saves a defined number of
periods of voltage and current on a trigger occurrence. Each recording consists of pretrigger interval (before trigger) and post-trigger interval (after trigger).
Figure 3.42: Triggering in waveform record
3.14.1 Setup
By entering WAVEFORM RECORDER from the RECORDERS submenu the following
setup screen is shown:
Figure 3.43: Waveform recorder setup screen
ENTER
MI 2892 Power Master Operating the instrument
59
Table 3.46: Waveform recorder settings description and screen symbols
Waveform recorder is active, waiting for trigger
Waveform recorder is active, recording in progress
Trigger
Trigger source set up:
Events – triggered by voltage event (see 3.19.2);
Alarms – triggered by alarm activation (see 3.19.3);
Events & Alarms – triggered by alarm or event;
Level U – triggered by voltage level;
Level I – triggered by current level (inrush).
Level*
Voltage or current level in % of nominal voltage or current
and in (V or A), which will trigger recording
Slope*
Rise – triggering will occur only if voltage or current
rise above given level
Fall - triggering will occur only if voltage or current
fall below given level
Any – triggering will occur if voltage or current rise
above or fall below given level
Duration
Record length.
Pretrigger
Recorded interval before triggering occurs.
Store mode
Store mode setup:
Single – waveform recording ends after first trigger;
Continuous – consecutive waveform recording
until user stops the measurement or instrument
runs out of storage memory. Every consecutive
waveform recording will be treated as a separate
record. Maximal 200 records can be recorded.
* Available only if Level U or Level I triggering is selected.
Table 3.47: Keys in Waveform recorder setup screen
START
Starts waveform recording.
Stops waveform recording.
Note: If user forces waveform recorder to stop before trigger
occurs, no data will be recorded. Data recording occurs only
when trigger is activated.
STOP
TRIG.
Manually generates trigger condition and starts recording.
SCOPE
Switches to SCOPE view.
(Active only if recording in progress).
Selects parameter to be changed.
Modifies parameter.
Returns to the “RECORDERS” submenu.
3.14.2 Capturing waveform
Following screen opens when a user switches to SCOPE view.
F1
F2
F4
MI 2892 Power Master Operating the instrument
60
Figure 3.44: Waveform recorder capture screen
Table 3.48: Instrument screen symbols and abbreviations
Waveform recorder is active, waiting for trigger
Waveform recorder is active, recording in progress
U1, U2, U3, Un True effective value of phase voltage: U
1Rms
, U
2Rms, U3Rms, UNRms
U12, U23, U31 True effective value of phase-to-phase (line) voltage:
U
12Rms, U23Rms
, U
31Rms
I1, I2, I3, In True effective value of current: I
1Rms
, I
2Rms
, I
3Rms, INRms
Table 3.49: Keys in Waveform recorder capture screen
TRIG.
Manually generates trigger condition (Active only if recording
is in progress).
Selects which waveforms to show:
U I U,I U/I
Shows voltage waveform.
U I U,I U/I
Shows current waveform.
U I U,I U/I
Shows voltage and current waveforms on single graph.
U I U,I U/I
Shows voltage and current waveforms on separate graphs.
Selects between phase, neutral, all-phases and line view:
1 2 3 N
Shows waveforms for phase L1.
1 2 3 N
Shows waveforms for phase L2.
1 2 3 N
Shows waveforms for phase L3.
1 2 3 N
Shows waveforms for neutral channel.
1 2 3 N
Shows waveforms for all phases.
12 23 31 Δ
Shows waveforms for phase to phase voltage L12.
12 23 31 Δ
Shows waveforms for phase to phase voltage L23.
12 23 31 Δ
Shows waveforms for phase to phase voltage L31.
12 23 31 Δ
Shows waveforms for all phase-to-phase voltages.
SETUP
Switches to SETUP view.
(Active only if recording in progress).
Selects which waveform to zoom (only in U,I or U/I ).
Sets vertical zoom.
F1
F2
F3
F4
ENTER
MI 2892 Power Master Operating the instrument
61
Sets horizontal zoom.
Returns to the “WAVEFORM RECORDER” setup screen.
3.14.3 Captured waveform
Captured waveforms can be viewed from the Memory list menu.
Figure 3.45: Captured waveform recorder screen
Table 3.50: Instrument screen symbols and abbreviations
Memory list recall. Shown screen is recalled from memory
t: Cursor position in seconds (regarding to trigger time – blue
line on graph)
u1(t), u2(t), u3(t), un(t) Samples value of phase voltages U1, U2, U3, UN.
u12(t), u23(t), u31(t) Samples value of phase to phase voltages U12, U23, U31.
i1(t), i2(t), i3(t), in(t) Samples value of phase currents I1, I2, I3, IN.
U1, U2, U3, Un True effective half cycle phase voltage U
Rms½
U12, U23, U31 True effective half cycle phase to phase voltage U
Rms½
I1, I2, I3, In True effective half cycle value I
Rms½
Table 3.51: Keys in captured waveform recorder screens
Selects between the following options:
U I U,I U/I
Shows voltage waveform.
U I U,I U/I
Shows current waveform.
U I U,I U/I
Shows voltage and current waveforms (single mode).
U I U,I U/I
Shows voltage and current waveforms (dual mode).
Selects between phase, neutral, all-phases and view:
1 2 3 N
Shows waveforms for phase L1.
1 2 3 N
Shows waveforms for phase L2.
1 2 3 N
Shows waveforms for phase L3.
1 2 3 N
Shows waveforms for neutral channel.
1 2 3 N
Shows all phases waveforms.
F2
F3
MI 2892 Power Master Operating the instrument
62
12 23 31 Δ
Shows waveforms for phase to phase voltage L12.
12 23 31 Δ
Shows waveforms for phase to phase voltage L23.
12 23 31 Δ
Shows waveforms for phase to phase voltage L31.
12 23 31 Δ
Shows all phase-to-phase waveforms.
Sets vertical zoom.
Moves cursor.
Toggles between sample value and true effective half cycle value at
cursor position.
Toggles cursor between voltage and current (only in U,I or U/I).
Returns to the “MEMORY LIST” submenu.
3.15 Transient recorder
Transient is a term for short, highly damped momentary voltage or current
disturbance. A transient recording is recording with the 51.2 kHz sampling rate. The
principle of measurement is similar to waveform recording, but with a 10 times higher
sampling rate (1024 samples per period). In contrary to waveform recording, where
recording is triggered based on RMS values, trigger in transient recorder is based on
sample values.
3.15.1 Setup
Figure 3.46: Transient recorder setup screen
Table 3.52: Transient recorder settings description and screen symbols
Transient recorder is active, waiting for trigger
Transient recorder is active, recording in progress
Trigger (Envelope)
Trigger value is based on envelope within voltage that is
expected. As reference, voltage waveform from previous
cycle is taken. If current sample is not within envelope,
triggering will occur. See 5.1.16 for details.
ENTER
MI 2892 Power Master Operating the instrument
63
Level
Envelope voltage level
Trigger (Level U)
Trigger will occur if any sample within period is greater
than defined absolute trigger level. See 5.1.16 for details.
Level
Absolute trigger level in voltage
Duration
Record length.
Pretrigger
Recorded intervals before triggering occur.
Store mode
Store mode setup:
Single – transient recording ends after first trigger
Continuous – consecutive transient recording until
user stops the measurement or instrument runs out
of storage memory. Every consecutive transient
recording will be treated as a separate record.
Maximal 200 records can be recorded.
Table 3.53: Keys in Transient recorder setup screen
START
Starts transient recorder.
Stops transient recorder.
Note: If user forces transient recorder to stop before trigger
occurs, no data is recorded. Data recording occurs only when
trigger is activated.
STOP
TRIG.
Manually generates trigger condition and starts recording.
SCOPE
Switches to SCOPE view (Active only if recording in progress).
Selects parameter to be changed.
Modifies parameter.
Returns to the “RECORDERS” submenu.
3.15.2 Capturing transients
After transient recorder is started, instrument waits for trigger occurrence. This can be
seen by observing status bar, where icon is present. If trigger conditions are met,
recording will be started.
F1
F2
F4
MI 2892 Power Master Operating the instrument
64
Figure 3.47: Transient recorder capture screen
Table 3.54: Instrument screen symbols and abbreviations
Transient recorder is active, waiting for trigger
Transient recorder is active, recording in progress
U1, U2, U3, Un True effective value of phase voltage: U
1Rms, U2Rms, U3Rms,
U
NRms
U12, U23, U31 True effective value of phase-to-phase voltage:
U
12Rms
, U
23Rms
, U
31Rms
I1, I2, I3, In True effective value of current: I
1Rms
, I
2Rms, I3Rms, INRms
Table 3.55: Keys in Transient recorder capture screen
TRIG.
Manually generates trigger condition (Active only if recording
is in progress).
Selects which waveforms to show:
U I U,I U/I
Shows voltage waveform.
U I U,I U/I
Shows current waveform.
U I U,I U/I
Shows voltage and current waveforms on single graph.
U I U,I U/I
Shows voltage and current waveforms on separate graphs.
Selects between phase, neutral, all-phases and line view:
1 2 3 N
Shows waveforms for phase L1.
1 2 3 N
Shows waveforms for phase L2.
1 2 3 N
Shows waveforms for phase L3.
1 2 3 N
Shows waveforms for neutral channel.
1 2 3 N
Shows waveforms for all phases.
12 23 31 Δ
Shows waveforms for phase to phase voltage L12.
12 23 31 Δ
Shows waveforms for phase to phase voltage L23.
12 23 31 Δ
Shows waveforms for phase to phase voltage L31.
12 23 31 Δ
Shows waveforms for all phase-to-phase voltages.
SETUP
Switches to SETUP view (Active only if recording in progress).
Sets vertical zoom.
Selects which waveform to zoom (only in U,I or U/I ).
F1
F2
F3
F4
ENTER
MI 2892 Power Master Operating the instrument
65
Returns to the “TRANSIENT RECORDER” setup screen.
3.15.3 Captured transients
Captured transient records can be viewed from the Memory list where captured
waveforms can be analysed. Trigger occurrence is marked with the blue line, while
cursor position line is marked in black.
Figure 3.48: Captured transient recorder screen
Table 3.56: Instrument screen symbols and abbreviations
Memory list recall. Shown screen is recalled from memory
t:
Cursor position regarding to trigger time (blue line on graph)
u1(t), u2(t), u3(t), un(t) Samples value of phase voltages U1, U2, U3, UN.
u12(t), u23(t), u31(t) Samples value of phase to phase voltages U12, U23, U31.
i1(t), i2(t), i3(t), in(t) Samples value of phase currents I1, I2, I3, IN.
Table 3.57: Keys in captured transient recorder screens
Selects between the following options:
U I U,I U/I
Shows voltage waveform.
U I U,I U/I
Shows current waveform.
U I U,I U/I
Shows voltage and current waveforms (single mode).
U I U,I U/I
Shows voltage and current waveforms (dual mode).
Selects between phase, neutral, all-phases and view:
1 2 3 N
Shows waveforms for phase L1.
1 2 3 N
Shows waveforms for phase L2.
1 2 3 N
Shows waveforms for phase L3.
1 2 3 N
Shows waveforms for neutral channel.
1 2 3 N
Shows waveforms for all phases.
12 23 31 Δ
Shows waveforms for phase to phase voltage L12.
12 23 31 Δ
Shows waveforms for phase to phase voltage L23.
12 23 31 Δ
Shows waveforms for phase to phase voltage L31.
F2
F3
MI 2892 Power Master Operating the instrument
66
12 23 31 Δ
Shows waveforms for all phase-to-phase voltages.
ZOOM
Sets horizontal zoom
Sets vertical zoom.
Moves cursor.
Toggles cursor between voltage and current (only in U,I or U/I).
Returns to the “MEMORY LIST” submenu.
3.16 Events table
In this table captured voltage dips, swells and interrupts are shown. Note that events
appear in the table after finishing, when voltage return to the normal value. All events
can be grouped according to IEC 61000-4-30. Additionally for troubleshooting purposes
events can be separated by phase. This is toggled by pressing function key F1.
Group view
In this view voltage event are grouped according to IEC 61000-4-30 (see section 5.1.11
for details). Table where events are summarized is shown below. Each line in table
represents one event, described by event number, event start time, duration and level.
Additionally in colon “T” event characteristics (Type) is shown (see table below for
details).
Figure 3.49: Voltage events in group view screen
By pressing “ENTER” on particular event we can examine event details. Event is split by
phase events sorted by start time.
F4
ENTER
MI 2892 Power Master Operating the instrument
67
Figure 3.50: Voltage events in detail view screen
Table 3.58: Instrument screen symbols and abbreviations
Date Date when selected event has occurred
No. Unified event number (ID)
L Indicate phase or phase-to-phase voltage where event has occurred:
1 – event on phase U1
2 – event on phase U2
3 – event on phase U3
12 – event on voltage U12
23 – event on voltage U23
31 – event on voltage U31
Note: This indication is shown only in event details, since one grouped
event can have many phase events.
Start Event start time (when first U
Rms½
) value crosses threshold.
T Indicates type of event or transition:
D – Dip
I – Interrupt
S – Swell
Level Minimal or maximal value in event U
Dip
, U
Int
, U
Swell
Duration Event duration.
Table 3.59: Keys in Events table group view screens
PH
Group view is shown. Press to switch on “PHASE” view.
PH
Phase view is shown. Press to switch on “GROUP” view.
STAT
Shows event statistics.
F1
F4
MI 2892 Power Master Operating the instrument
68
EVENTS
Returns to “EVENTS” view.
Selects event.
Enters detail event view.
Returns to Events table group view screen.
Returns to “RECORDERS” submenu.
Phase view
In this view voltage events are separated by phases. This is convenient view for
troubleshooting. Additionally user can use filters in order to observe only particular type
of event on a specific phase. Captured events are shown in a table, where each line
contains one phase event. Each event has an event number, event start time, duration
and level. Additionally in colon “T” type of event is shown (see table below for details).
Figure 3.51: Voltage events screens
You can also see details of each individual voltage event and statistics of all events.
Statistics show count registers for each individual event type by phase.
Table 3.60: Instrument screen symbols and abbreviations
Date Date when selected event has occurred
No. Unified event number (ID)
L Indicate phase or phase-to-phase voltage where event has occurred:
ENTER
MI 2892 Power Master Operating the instrument
69
1 – event on phase U1
2 – event on phase U2
3 – event on phase U3
12 – event on voltage U12
23 – event on voltage U23
31 – event on voltage U31
Start Event start time (when first U
Rms½
) value crosses threshold.
T Indicates type of event or transition:
D – Dip
I – Interrupt
S – Swell
Level Minimal or maximal value in event U
Dip
, U
Int
, U
Swell
Duration Event duration.
Table 3.61: Keys in Events table phase view screens
PH
Group view is shown. Press to switch on “PHASE” view.
PH
Phase view is shown. Press to switch on “GROUP”
view.
Filters events by type:
DIP INT SWELL
Shows all event types.
DIP INT SWELL
Shows dips only.
DIP INT SWELL
Shows interrupts only.
DIP INT SWELL
Shows swells only.
Filters events by phase:
1 2 3 T
Shows only events on phase L1.
1 2 3 T
Shows only events on phase L2.
1 2 3 T
Shows only events on phase L3.
1 2 3 T
Shows events on all phases.
12 23 31 T
Shows only events on phases L12.
12 23 31 T
Shows only events on phases L23.
12 23 31 T
Shows only events on phases L31.
12 23 31 T
Shows events on all phases.
STAT
Shows event summary (by types and phases).
F1
F2
F3
F4
MI 2892 Power Master Operating the instrument
70
EVENTS
Returns to EVENTS view.
Selects event.
Enters detail event view.
Returns to Events table phase view screen.
Returns to the “RECORDERS” submenu.
3.17 Alarms table
This screen shows list of alarms which went off. Alarms are displayed in a table, where
each row represents an alarm. Each alarm is associated with a start time, phase, type,
slope, min/max value and duration (see 3.19.3 for alarm setup and 5.1.12 for alarm
measurement details).
Figure 3.52: Alarms list screen
Table 3.62: Instrument screen symbols and abbreviations
Date Date when selected alarm has occurred
Start Selected alarm start time (when first U
Rms
value cross threshold)
L Indicate phase or phase-to-phase voltage where event has occurred:
1 – alarm on phase L1
2 – alarm on phase L2
3 – alarm on phase L3
12 – alarm on line L12
23 – alarm on line L23
31 – alarm on line L31
Slope Indicates alarms transition:
Rise – parameter has over-crossed threshold
ENTER
MI 2892 Power Master Operating the instrument
71
Fall – parameter has under-crossed threshold
Min/Max Minimal or maximal parameter value during alarm occurrence
Duration Alarm duration.
Table 3.63: Keys in Alarms table screens
Filters alarms according to the following
parameters:
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
All alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Voltage alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Combined power alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Fundamental power alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Nonfundamental power alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Flicker alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Unbalance alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Harmonics alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Interharmonics alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Signalling alarms.
UIF C. Pwr F. Pwr NF. Pwr
Flick Sym H iH Sig Temp
Temperature alarms.
Filters alarms according to phase on which
they occurred:
1 2 3 N 12 23 31 T
Shows only alarms on phase L1.
1 2 3 N 12 23 31 T
Shows only alarms on phase L2.
1 2 3 N 12 23 31 T
Shows only alarms on phase L3.
1 2 3 N 12 23 31 T
Shows only alarms on neutral channel.
1 2 3 N 12 23 31 T
Shows only alarms on phases L12.
1 2 3 N 12 23 31 T
Shows only alarms on phases L23.
1 2 3 N 12 23 31 T
Shows only alarms on phases L31.
1 2 3 N 12 23 31 T
Shows only alarms on channels which are not
channel dependent
1 2 3 N 12 23 31 T
Shows all alarms.
Selects an alarm.
F2
F3
MI 2892 Power Master Operating the instrument
72
Returns to the “RECORDERS” submenu.
3.18 Memory List
Using this menu user can view and browse saved records. By entering this menu,
information about records is shown.
Figure 3.53: Memory list screen
Table 3.64: Instrument screen symbols and abbreviations
Record No
Selected record number, for which details are shown.
FILE NAME
Record name on SD Card
Type
Indicates type of record, which can be one of following:
Snapshot,
Transient record,
Waveform/inrush record,
General record.
Interval
General record recording interval (integration period)
Trigger
Trigger used for capturing waveform and transient record
Level
Trigger level
Slope
Trigger slope
Duration
Record duration
Start
General record start time.
End
General record stop time.
Size
Record size in kilobytes (kB) or megabytes (MB).
Table 3.65: Keys in Memory list screen
VIEW
Views details of currently selected record.
CLEAR
Clears selected record.
CLR ALL
Opens confirmation window for clearing all saved
records.
Keys in confirmation window:
F1
F2
F4
MI 2892 Power Master Operating the instrument
73
Selects YES or NO.
Confirms selection.
Exits confirmation window without
clearing saved records.
Browses through records (next or previous record).
Returns to the “RECORDERS” submenu.
3.18.1 General Record
This type of record is made by GENERAL RECORDER. Record front page is similar to
the GENERAL RECORDER setup screen, as shown on figure below.
Figure 3.54: Front page of General record in MEMORY LIST menu
Table 3.66: Recorder settings description
Record No.
Selected record number, for which details are shown.
FILE NAME
Record name on SD Card
Type
Indicate type of record:
General record.
Interval
General record recording interval (integration period)
Start
General record start time.
End
General record stop time.
Size
Record size in kilobytes (kB) or megabytes (MB).
Table 3.67: Keys in General record front page screen
VIEW
Switches to the CHANNELS SETUP menu screen.
Particular signal groups can be observed by pressing
on F1 key (VIEW).
ENTER
F1
MI 2892 Power Master Operating the instrument
74
Keys in CHANNELS SETUP menu screen:
Selects particular signal group.
Enters particular signal group
(TREND view).
Exits to MEMORY LIST menu.
CLEAR
Clears the last record. In order to clear complete
memory, delete records one by one.
CLR ALL
Opens confirmation window for clearing all saved
records.
Keys in confirmation window:
Selects YES or NO.
Confirms selection.
Exits confirmation window without
clearing saved records.
Browses through records (next or previous record).
Selects parameter (only in CHANNELS SETUP menu).
Returns to the “RECORDERS” submenu.
By pressing VIEW, in CHANNELS SETUP menu, TREND graph of selected
channel group will appear on the screen. Typical screen is shown on figure below.
F1
ENTER
F2
F4
ENTER
F1
MI 2892 Power Master Operating the instrument
75
Figure 3.55: Viewing recorder U,I,f TREND data
Table 3.68: Instrument screen symbols and abbreviations
Memory list recall. Shown screen is recalled from memory.
Indicates position of the cursor at the graph.
U1, U2 U3,
Un:
Maximal ( ), average ( ) and minimal ( ) recorded value of phase
voltage U
1Rms
, U
2Rms
, U
3Rms
, U
NRms,
for time interval selected by cursor.
U12, U23,
U31
Maximal ( ), average ( ) and minimal ( ) recorded value of phase-tophase voltage U
12Rms
, U
23Rms
, U
31Rms
for time interval selected by
cursor.
Ip:
Maximal ( ), average ( ) and minimal ( ) recorded value of current
I
1Rms
, I
2Rms
, I
3Rms
, I
NRms
, for time interval selected by cursor.
38m 00s Time position of cursor regarding to the record start time.
10.May.2013
12:08:50
Time clock at cursor position.
Table 3.69: Keys in Viewing recorder U,I,f TREND screens
Selects between the following options:
U I f U,I U/I
Shows voltage trend.
U I f U,I U/I
Shows current trend.
U I f U,I U/I
Shows frequency trend.
U I f U,I U/I
Shows voltage and current trends (single mode).
U I f U,I U/I
Shows voltage and current trends (dual mode).
Selects between phase, neutral, all-phases and view:
1 2 3 N
Shows trend for phase L1.
1 2 3 N
Shows trend for phase L2.
1 2 3 N
Shows trend for phase L3.
1 2 3 N
Shows trend for neutral channel.
1 2 3 N
Shows all phases trends.
12 23 31 Δ Shows trend for phases L12.
F2
F3
MI 2892 Power Master Operating the instrument
76
12 23 31 Δ Shows trend for phases L23.
12 23 31 Δ
Shows trend for phases L31.
12 23 31 Δ
Shows all phase to phase trends.
Moves cursor and select time interval (IP) for observation.
Returns to the “CHANNELS SETUP” menu screen.
Note: Other recorded data (power, harmonics, etc.) has similar manipulation principle
as described in previous sections of this manual.
3.18.2 Waveform snapshot
This type of record can be made by using key (press and hold key).
Figure 3.56: Front page of Snapshot in MEMORY LIST menu
Table 3.70: Recorder settings description
Record No.
Selected record number, for which details are shown.
FILE NAME
Record name on SD Card
Type
Indicate type of record:
Snapshot.
Start
Record start time.
Size
Record size in kilobytes (kB).
Table 3.71: Keys in Snapshot record front page screen
VIEW
Switches to CHANNELS SETUP menu screen.
Particular signal group can be observed by pressing on F1
key (VIEW).
F1
MI 2892 Power Master Operating the instrument
77
Keys in CHANNELS SETUP menu screen:
Selects particular signal group.
Enters particular signal group
(METER or SCOPE view).
Exits to MEMORY LIST menu.
CLEAR
Clears the last record. In order to clear complete memory,
delete records one by one.
CLR ALL
Opens confirmation window for clearing all saved records.
Keys in confirmation window:
Selects YES or NO.
Confirms selection.
Exits confirmation window without
clearing saved records.
Browses through records (next or previous record).
Returns to the “RECORDERS” submenu.
By pressing VIEW in CHANNELS SETUP menu METER screen will appear.
Typical screen is shown on figure below.
Figure 3.57: U,I,f meter screen in recalled snapshot record
F1
ENTER
F2
F4
ENTER
F1
MI 2892 Power Master Operating the instrument
78
Note: For more details regarding manipulation and data observing see previous
sections of this manual.
3.18.3 Waveform/inrush record
This type of record is made by Waveform recorder. For details regarding manipulation
and data observing see section Captured waveform 3.14.3.
3.18.4 Transients record
This type of record is made by Transient recorder. For details regarding manipulation
and data observing see section 3.15.3.
3.19 Measurement Setup submenu
From the “MEASUREMENT SETUP” submenu measurement parameters can be
reviewed, configured and saved.
Figure 3.58: MEASUREMENT SETUP submenu
Table 3.72: Description of Measurement setup options
Connection setup
Setup measurement parameters.
Event setup
Setup event parameters.
Alarm setup
Setup alarm parameters.
Signalling setup
Setup signalling parameters.
Table 3.73: Keys in Measurement setup submenu screen
Selects option from the “MEASUREMENT SETUP” submenu.
Enters the selected option.
Returns to the “MAIN MENU” screen.
ENTER
MI 2892 Power Master Operating the instrument
79
3.19.1 Connection setup
Figure 3.59: “CONNECTION SETUP” screen
Table 3.74: Description of Connection setup
Nominal voltage
Set nominal voltage. Select voltage according to the
network voltage. If voltage is measured over potential
transformer then press ENTER for setting transformer
parameters:
Voltage ratio: Potential transformer ratio Δ:
Transformer type Additional
transformer ratio
Primary Secondary Symbol
Delta Star 1
Star Delta
√
3
Star Star
1
√
3
Delta Delta 1
Note: Instrument can always measure accurately at up
to 150% of selected nominal voltage.
Phase Curr. Clamps
Neutral Curr. Clamps
Selects phase clamps for phase current measurements.
MI 2892 Power Master Operating the instrument
80
Note: For Smart clamps (A 1227, A 1281) always select
“Smart clamps”.
Note: See section 4.2.3 for details regarding further
clamps settings.
Connection
Method of connecting the instrument to multi-phase
systems (see 4.2.1 for details).
1W: 1-phase 2-wire system;
3W: 3-phase 3-wire system;
4W: 3-phase 4-wire system;
OpenD: 3-phase 2 ½ -wire (Open Delta) system.
MI 2892 Power Master Operating the instrument
81
Synchronization
Synchronization channel. This channel is used for
instrument synchronization to the network frequency.
Also a frequency measurement is performed on that
channel. Depending on Connection user can select:
1W: U1 or I1.
3W, OpenD: U12, or I1.
4W: U1, I1.
System frequency
Select system frequency. According to this setting
10/12-cycle or 12 cycle interval will be used for calculus
(according to IEC 61000-4-30):
50 Hz
60 Hz
Default parameters
Set factory default parameters. These are:
Nominal voltage: 230V (L-N);
Voltage ratio: 1:1;
Δ: 1
Phase current clamps: Smart Clamps;
Neutral current clamps: Smart Clamps;
Connection: 4W;
Synchronization: U1
System frequency: 50 Hz.
Dip voltage: 90% U
Nom
Interrupt voltage: 5% U
Nom
Swell voltage: 110% U
Nom
Clear alarm setup table
By pressing ENTER on Nominal Voltage menu, user can select additional parameters,
such as Potential transformer voltage ratio.
Table 3.75: Keys in Connection setup menu
Selects Connection setup parameter to be modified.
Changes selected parameter value.
MI 2892 Power Master Operating the instrument
82
Enters into submenu.
Confirms Factory reset.
Returns to the “MEASUREMENT SETUP” submenu.
3.19.2 Event setup
In this menu user can setup voltage events and their parameters. See 5.1.11 for further
details regarding measurement methods. Captured events can be observed through
EVENTS TABLE screen. See 3.16 and 5.1.11 for details.
Figure 3.60: Event setup screen
Table 3.76: Description of Event setup
Nominal voltage
Indication of type (L-N or L-L) and value of nominal voltage.
Swell
Set swell threshold value.
Dip
Set dip threshold value.
Interrupt
Set interrupt threshold value.
Table 3.77: Keys in Event setup screen
Selects Voltage events setup parameter to be modified.
Changes selected parameter value.
Returns to the “MEASUREMENT SETUP” submenu.
3.19.3 Alarm setup
Up to 10 different alarms, based on any measurement quantity which is measured by
instrument, can be defined. See 5.1.12 for further details regarding measurement
methods. Captured events can be observed through ALARMS TABLE screens. See
3.17 and 5.1.12 for details.
ENTER
MI 2892 Power Master Operating the instrument
83
Figure 3.61: Alarm setup screens
Table 3.78: Description of Alarm setup
1st column Quantity
(P+, Uh5, I,
on figure above)
Select alarm from measurement group and then
measurement itself.
2nd column Phase
(TOT, L1,
on figure above)
Select phases for alarms capturing
L1 – alarms on phase L1;
L2 – alarms on phase L2;
L3 – alarms on phase L3;
LN – alarms on phase N;
L12 – alarms on line L12;
L23 – alarms on line L23;
L31 – alarm on line L
31
;
ALL – alarms on any phase;
TOT – alarms on power totals or non-phase
measurements (frequency, unbalance).
3rd column Condition
( “>” on figure above)
Select triggering method:
< trigger when measured quantity is lower than threshold
(FALL);
> trigger when measured quantity is higher than threshold
(RISE);
4th column Level
Threshold value.
5th column Duration
Minimal alarm duration. Triggers only if threshold is crossed
for a defined period of time.
Note: It is recommended that for flicker measurement,
recorder is set to 10 min.
Table 3.79: Keys in Alarm setup screens
ADD
Adds new alarm.
F1
MI 2892 Power Master Operating the instrument
84
REMOVE
Clears selected or all alarms:
EDIT
Edits selected alarm.
Enters or exits a submenu to set an alarm.
Cursor keys. Selects parameter or changes value.
Cursor keys. Selects parameter or changes value.
Confirms setting of an alarm.
Returns to the “MEASUREMENT SETUP” submenu.
3.19.4 Signalling setup
Mains signalling voltage, called “ripple control signal” in certain applications, is a burst of
signals, often applied at a non-harmonic frequency, that remotely control industrial
equipment, revenue meters, and other devices.
Two different signalling frequencies can be defined. Signals can be used as a source for
the user defined alarm and can also be included in recording. See section 3.19.3 bhow
to set-up alarms. See section 3.13 for instructions how to start recording.
Figure 3.62: Signalling setup screen
Table 3.80: Keys in Signalling setup screen
Toggles between Signal 1 and Signal 2.
Changes selected signalling frequency value.
Returns to the “MEASUREMENT SETUP” submenu.
3.20 General Setup submenu
From the “GENERAL SETUP” submenu communication parameters, real clock time,
language can be reviewed, configured and saved.
F2
F3
ENTER
MI 2892 Power Master Operating the instrument
85
Figure 3.63: GENERAL SETUP submenu
Table 3.81: Description of General setup options
Communication
Setup communication source and baud rate.
Time & Date
Set time, date and time zone.
Language
Select language.
Instrument info
Information about the instrument.
Lock/Unlock
Lock instrument to prevent unauthorized access.
Colour Model
Select colours for displaying phase measurements.
Table 3.82: Keys in General setup submenu
Selects option from the “GENERAL SETUP” submenu.
Enters the selected option.
Returns to the “MAIN MENU” screen.
3.20.1 Communication
RS 232, USB or INTERNET communication can be set in this menu.
Figure 3.64: Communication setup screen
ENTER
MI 2892 Power Master Operating the instrument
86
Table 3.83: Description of Communication setup options
PC connection
Select RS-232, USB or INTERNET communication port.
GPS
Enable GPS if used for time synchronisation.
Secret key
Valid only if INTERNET communication is selected.
Secret number will assure additional protection of
communication link. Same number should be entered in
PowerView v3.0, before connection establishment.
MAC address
Instrument Ethernet MAC address.
Instrument host name
Instrument host name.
Instrument IP address
Instrument IP address.
Note: For more information regarding configuration, how to download data, view real
time measuring data on PowerView and establish Remote instrument connection with
PowerView over internet, RS-232 and USB communication interfaces, see section 4.3
and PowerView Instruction manual.
Table 3.84: Keys in Communication setup
Changes communication source (RS – 232, USB, INTERNET)
Enables/disables GPS.
Moves cursor position during entering Secret key.
Cursor keys. Selects parameter.
Changes Secret key number.
Enters Secret key edit window.
Returns to the “GENERAL SETUP” submenu.
3.20.2 Time & Date
Time, date and time zone can be set in this menu.
3.20.3 Time & Date
Figure 3.65: Set date/time screen
ENTER
MI 2892 Power Master Operating the instrument
87
Table 3.85: Description of Set date/time screen
Clock source
Show clock source:
RTC – internal real time clock
GPS – external GPS receiver
Note: GPS clock source is automatically set if GPS is
enabled and detected.
Time zone
Selects time zone.
Note: Power Master has the ability to synchronize its
system time clock with Coordinated Universal Time (UTC
time) provided by externally connected GPS module.
In that case only hours (time zone) should be adjusted. In
order to use this functionality, see 4.2.5.
Current Time & Date
Show/edit current time and date (valid only if RTC is used
as time source)
Table 3.86: Keys in Set date/time screen
Selects parameter to be changed.
Modifies parameter.
Selects between the following parameters: hour, minute, second,
day, month or year.
Enters Date/time edit window.
Returns to the “GENERAL SETUP” submenu.
3.20.4 Language
Different languages can be selected in this menu.
ENTER
MI 2892 Power Master Operating the instrument
88
Figure 3.66: Language setup screen
Table 3.87: Keys in Language setup screen
Selects language.
Confirms the selected language.
Returns to the “GENERAL SETUP” submenu.
3.20.5 Instrument info
Basic information concerning the instrument (company, user data, serial number,
firmware version and hardware version) can be viewed in this menu.
Figure 3.67: Instrument info screen
Table 3.88: Keys in Instrument info screen
Returns to the “GENERAL SETUP” submenu.
3.20.6 Lock/Unlock
Power Master has the ability to prevent unauthorized access to all important instrument
functionality by simply locking the instrument. If instrument is left for a longer period at
an unsupervised measurement spot, it is recommended to prevent unintentional
stopping of record, instrument or measurement setup modifications, etc. Although
instrument lock prevents unauthorized changing of instrument working mode, it does not
prevent non-destructive operations as displaying current measurement values or trends.
User locks the instrument by entering secret lock code in the Lock/Unlock screen.
ENTER
MI 2892 Power Master Operating the instrument
89
Figure 3.68: Lock/Unlock screen
Table 3.89: Description of Lock/Unlock screen
Pin
Four digit numeric code used for Locking/Unlocking the
instrument.
Press ENTER key for changing the Pin code. “Enter PIN”
window will appear on screen.
Note: Pin code is hidden (****), if the instrument is locked.
Lock
The following options for locking the instrument are
available:
Disabled
Enabled
Table 3.90: Keys in Lock/Unlock screen
Selects parameter to be modified.
Change value of the selected digit in Enter pin window.
Selects digit in Enter pin window.
Locks the instrument.
Opens Enter pin window for unlocking.
Opens Enter pin window for pin modification.
Accepts new pin.
Unlocks the instrument (if pin code is correct).
Returns to the “GENERAL SETUP” submenu.
Following table shows how locking impacts instrument functionality.
Table 3.91: Locked instrument functionality
MEASUREMENTS
Allowed access.
Waveform snapshot functionality is blocked.
RECORDERS No access.
MEASUREMENT SETUP No access.
GENERAL SETUP No access except to Lock/Unlock menu.
ENTER
MI 2892 Power Master Operating the instrument
90
Figure 3.69: Locked instrument screen
Note: In case user forget unlock code, general unlock code “7350” can be used to
unlock the instrument.
3.20.7 Colour model
In COLOUR MODEL menu, user can change colour representation of phase voltages
and currents, according to the customer needs. There are some predefined colour
schemes (EU, USA, etc.) and a custom mode where user can set up its own colour
model.
Figure 3.70: Colour representation of phase voltages
Table 3.92: Keys in Colour model screens
EDIT
Opens edit colour screen (only available in custom model).
F1
MI 2892 Power Master Operating the instrument
91
Keys in Edit colour screen:
L1 L2 L3 N
Shows selected colour for phase L1.
L1 L2 L3 N
Shows selected colour for phase L2.
L1 L2 L3 N
Shows selected colour for phase L3.
L1 L2 L3 N
Shows selected colour for neutral
channel N.
Selects colour.
Returns to the “COLOUR MODEL” screen.
Selects Colour scheme.
Confirms selection of Colour scheme and returns to the “GENERAL
SETUP” submenu.
Returns to the “GENERAL SETUP” submenu without modifications.
F1
ENTER
ENTER
MI 2892 Power Master Recording Practice and Instrument Connection
92
4 Recording Practice and Instrument
Connection
In following section recommended measurement and recording practice is described.
4.1 Measurement campaign
Power quality measurements are specific type of measurements, which can last many
days, and mostly they are performed only once. Usually recording campaign is
performed to:
Statistically analyse some points in the network.
Troubleshoot malfunctioning device or machine.
Since measurements are mostly performed only once, it is very important to properly set
measuring equipment. Measuring with wrong settings can lead to false or useless
measurement results. Therefore instrument and user should be fully prepared before
measurement begins.
In this section recommended recorder procedure is shown. We recommend to strictly
follow guidelines in order to avoid common problems and measurement mistakes.
Figure below shortly summarizes recommended measurement practice. Each step is
then described in details.
Note: PC software PowerView v3.0 has the ability to correct (after measurement is
done):
wrong real-time settings,
wrong current and voltage scaling factors.
False instrument connection (messed wiring, opposite clamp direction), can’t be fixed
afterwards.
MI 2892 Power Master Recording Practice and Instrument Connection
93
Time & Date setup
Recharge batteries
Clear memory
Step 1:
Instrument Setup
Step 2:
Measurement Setup
Nominal voltage
Transf. voltage ratio
Step 2.2:
Voltage range & ratio
Phase diagram
U,I,f meter screen
Power meter screen
Step 3:
Inspection
Clamp type
Clamp range
Step 2.3:
Clamps setup
Conn.Type(4W,3W,1W)
Sync channel:U1 | I1 | U12
Freqency: 50 Hz | 60 Hz
Step 2.1:
Sync. & wiring
Preform measuremement
Save waveform snapshoots
Step 4:
On Line Measurement
Prepare instrument for new measurement,
before going to measuring site. Check:
Is it time and date correct?
Are batteries in good condition?
Is it Memory List empty? If it is not,
download all data from previous
measurements and release storage for
new measurement.
Setup Power Master according
to the measurement point
nominal voltage, currents, load
type. Optionally enable events or
alarms and define parameter
thresholds.
Double check Measurement setup
using Phase diagram, and various
scope and metering screens
Using power metering check if
power is flowing in right direction
(power should be positive for load
and negative for generator
measurements)
Nominal voltage
Thresholds
Step 2.4:
Event Setup
Define alarm and
its parameters
Step 2.5:
Alarm Setup
Select recording start
time and interval
Include alarms and
events into recorder
Start waveform recorder
Step 5:
Recorder setup
Recording in progress
Download data
Analyse data
Create report
Export to Excel or Word
Step 7:
Report generation (PowerView v3.0)
Start
In Office
On Measuring siteIn office
Stop recorder
Power off instrument
Remove wiring
Analyze recorderd data with
instrument (Memory List,
Event and Alarm tables)
Step 6:
Measurement conclusion
Sig. Freq. 1
Sig. Freq. 2
Step 2.6:
Signalling Setup
Figure 4.1: Recommended measurement practice
MI 2892 Power Master Recording Practice and Instrument Connection
94
Step 1: Instrument setup
On site measurements can be very stressful, and therefore it is good practice to prepare
measurement equipment in an office. Preparation of Power Master include following
steps:
Visually check instrument and accessories.
Warning: Don’t use visually damaged equipment!
Always use batteries that are in good condition and fully charge them before you
leave an office.
Note: In problematic PQ environment where dips and interrupts frequently occurs
instrument power supply fully depends on batteries! Keep your batteries in good
condition.
Download all previous records from instrument and clear the memory. (See
section 3.18 for instruction regarding memory clearing).
Set instrument time and date. (See section 3.20.2 for instruction regarding time
and date settings).
Step 2: Measurement setup
Measurement setup adjustment is performed on measured site, after we find out details
regarding nominal voltage, currents, type of wiring etc.
Step 2.1: Synchronization and wiring
Connect current clamps and voltage tips to the “Device under measurement”
(See section 4.2 for details).
Select proper type of connection in “Connection setup” menu (See section 3.19.1
for details).
Select synchronization channel. Synchronization to voltage is recommended,
unless measurement is performed on highly distorted loads, such as PWM
drives. In that case current synchronization can be more appropriate. (See
section 3.19.1 for details).
Select System frequency. System frequency is default mains system frequency.
Setting this parameter is recommended if to measure signalling or flickers.
Step 2.2: Nominal voltage and ratio
Select instrument nominal voltage according to the network nominal voltage.
Note: For 4W and 1W measurement all voltages are specified as phase-toneutral (L-N). For 3W and Open Delta measurements all voltages are specifies
as phase-to-phase (L-L).
Note: Instrument assures proper measurement up to 150 % of chosen nominal
voltage.
In case of indirect voltage measurement, select appropriate “Voltage ratio”
parameters, according to transducer ratio. (See section 3.19.1 and 4.2.2 for
details).
MI 2892 Power Master Recording Practice and Instrument Connection
95
Step 2.3: Current clamps setup
Using “Select Clamps” menu, select proper Phase and Neutral channel current
clamps (see sections 3.19.1 for details).
Select proper clamps parameters according to the type of connection (see
section 4.2.3 for details).
Step 2.4: Event setup
Select threshold values for: swell, dip and interrupts (see sections 3.19.2 and 3.16 for
details).
Note: You can also trigger WAVEFORM RECORDER on events. Instrument will then
capture waveform and inrush for each event.
Step 2.5: Alarm setup
Use this step if you would like only to check if some quantities crosses some predefined
boundaries (see sections 3.17 and 3.19.3 for details).
Note: You can also trigger WAVEFORM RECORDER on alarms. Instrument will then
capture waveform and inrush for each alarm.
Step 2.6: Signalling setup
Use this step only if you are interested in measuring mains signalling voltage. See
section 3.19.4 for details.
Step 3: Inspection
After setup instrument and measurement is finished, user need to re-check if everything
is connected and configured properly. Following steps are recommended:
Using PHASE DIAGRAM menu check if voltage and current phase sequence is
right regarding to the system. Additionally check if current has right direction.
Using U, I, f menu check if voltage and current have proper values.
Check voltage and current THD.
Note: Excessive THD can indicate that too small range was chosen!
Note: In case of AD converter overvoltage or overloading current, icon will
be displayed.
Using POWER menu check signs and indices of active, nonactive, apparrent
power and power factor.
If any of these steps give you suspicious measurement results, return to Step 2 and
double check measurement setup parameters.
Step 4: On-line measurement
Instrument is now ready for measurement. Observe on line parameters of voltage,
current, power, harmonics, etc. according to the measurement protocol or customer
demands.
Note: Use waveform snapshots to capture important measurement. Waveform
snapshot capture all power quality signatures at once (voltage, current, power,
harmonics, flickers).
MI 2892 Power Master Recording Practice and Instrument Connection
96
Step 5: Recorder setup and recording
Using GENERAL RECORDER menu select type of recording and configure recording
parameters such as:
Time Interval for data aggregation (Integration Period)
Include events and alarms capture if necessary
Recording start time (optional)
After setting recorder, recording can be started. (see section 3.13 for recorder
details). Additionally user can start WAVEFORM RECORDER if you want to get
waveform for each captured alarm or event.
Note: Available memory status in Recorder setup should be checked before starting
recording. Max. recording duration and max. number of records are automatically
calculated according to recorder setup and memory size.
Note: Recording usually last few days. Assure that instrument during recording session
is not reachable to the unauthorized persons. If necessary use LOCK functionality
described in section 3.20.6.
Step 6: Measurement conclusion
Before leaving measurement site we need to:
Preliminary evaluate recorded data using TREND screens.
Stop recorder.
Assure that we record and measure everything we needed.
Step 7: Report generation (PowerView v3.0)
Download records using PC software PowerView v3.0 perform analysis and create
reports. See PowerView v3.0 manual for details.
4.2 Connection setup
4.2.1 Connection to the LV Power Systems
This instrument can be connected to the 3-phase and single phase network.
The actual connection scheme has to be defined in CONNECTION SETUP menu (see
Figure below).
MI 2892 Power Master Recording Practice and Instrument Connection
97
Figure 4.2: Connection setup menu
When connecting the instrument it is essential that both current and voltage connections
are correct. In particular the following rules have to be observed:
Clamp-on current clamp-on transformers
The arrow marked on the clamp-on current transformer should point in the
direction of current flow, from supply to load.
If the clamp-on current transformer is connected in reverse the measured power
in that phase would normally appear negative.
Phase relationships
The clamp-on current transformer connected to current input connector I1 has to
measure the current in the phase line to which the voltage probe from L1 is
connected.
3-phase 4-wire system
In order to select this connection scheme, choose following connection on the
instrument:
Figure 4.3: Choosing 3-phase 4-wire system on instrument
Instrument should be connected to the network according to figure below:
MI 2892 Power Master Recording Practice and Instrument Connection
98
Figure 4.4: 3-phase 4-wire system
3-phase 3-wire system
In order to select this connection scheme, choose following connection on the
instrument:
Figure 4.5: Choosing 3-phase 3-wire system on instrument
Instrument should be connected to the network according to figure below.
Figure 4.6: 3-phase 3-wire system
MI 2892 Power Master Recording Practice and Instrument Connection
99
Open Delta (Aaron) 3-wire system
In order to select this connection scheme, choose following connection on the
instrument:
Figure 4.7: Choosing Open Delta (Aaron) 3-wire system on instrument
Instrument should be connected to the network according to figure below.
Figure 4.8: Open Delta (Aaron) 3-wire system
1-phase 3-wire system
In order to select this connection scheme, choose following connection on the
instrument:
MI 2892 Power Master Recording Practice and Instrument Connection
100
Figure 4.9: Choosing 1-phase 3-wire system on instrument
Instrument should be connected to the network according to figure below.
Figure 4.10: 1-phase 3-wire system
Note: In case of events capturing, it is recommended to connect unused voltage inputs
to N voltage input.
4.2.2 Connection to the MV or HV Power System
In systems where voltage is measured at the secondary side of a voltage transformer
(say 11 kV / 110 V), the voltage transformer ratio should be entered first. Afterward
nominal voltage can be set to ensure correct measurement. In the next figure settings
for this particular example is shown. See 3.19.1 for details.
Loading...