janitza UMG 605 Operating Manual

Doc No. 1.038.006.y

Power Quality Analyser

UMG 605

Operating manual and
technical data

Product No. 33.03.085

Janitza electronics GmbH
Vor dem Polstück 1
D-35633 Lahnau
Support Tel. [phone]
Fax [phone]
e-mail: [e-mail]
Internet: http://www.janitza.com

www.janitza.com

Profibus

Ethernet

Power supply voltage

Temperature
measurement
input

4 x current

measurement

4 x voltage

measurement

RS232 RS485 2 digital inputs

2 digital outputs

A B

2

UMG 605

General Information 4
Inspection on receipt 6

Scope of supply 7
Available accessories 7
Notes on Use 8

Product Description 10

Intended use 10
UMG605 features 11
Operating concept 12
GridVis programming software 13
Methods of measurement 14
Three-phase 4-wire systems 15
Three-phase 3-wire systems 16

Installation 18

Installed position 18
Power supply voltage 19
Voltage measurement 20
Frequency measurement 27
Current measurement 28
Direct measurement 32
Interfaces 34
RS485 36
RS485 profibus DP V0 slave 38
Digital inputs and outputs 40
Temperature measurement input 44

Operation 46

Key functions 46
Concealed key (service) 46
Display mode 47
Programming mode 48
Display password 49
Homepage password 49
Measurements 50
Voltage transformer ratio 52
Current transformer ratio 53
Interfaces 54
RS232 54
RS485 54
Ethernet 55
Profibus 56
Recordings 57

Putting into Service 58

Applying the power supply voltage 58
Frequency measurement 58
Applying the measuring-circuit voltage 59
Phase sequence 60
Applying the measuring-circuit current 60
Checking the energy measurement 61

3

UMG 605

System information 62

Overrange 62
Serial number 63
Date 63
Firmware release 63
Time 63

Service and maintenance 64

Repair and calibration 64
Front film 64
Battery 64
Firmware update 65
Service 65
Trouble shooting 66

Technical specifications 70

General information 70
Ambient conditions during operation 70
Transport and storage 70
Power supply voltage 71
Protection class 72
Inputs and outputs 73
Temperature measurement input 74
Interfaces 75
Function parameters 76
Measuring inputs 80
Voltage measurement 80

Appendix 82

Parameter list 82
Measured value displays 87
Declaration of conformity 88
Dimensioned drawings 90
UMG605 connection example 91

Quick Reference Instructions 92

4

UMG 605

General Information

Copyright

This manual is subject to the statutory co­pyright protection provisions and may not
be photocopied, reprinted, reproduced as a
whole or in parts, by mechanical or electronic
means, nor copied or further published in any
other way whatsoever without the legally bin­ding, written consent of
Janitza electronics GmbH,
Vor dem Polstück 1,
D 35633 Lahnau,
Germany.

Protected trademarks

All trademarks and their resulting rights be­long to the respective holders of these rights.

Liability disclaimer

Janitza electronics GmbH does not accept
any responsibility whatsoever for errors or
deficiencies within this manual and does not
undertake any obligation to keep the content
of this manual up to date.

Comments on the manual

We welcome your comments. If anything in
this manual seems unclear to you, please let
us know by sending an eMail to:

[e-mail]

5

UMG 605

m

c

Meaning of the symbols used

The following pictograms are used in this ma­nual:

Dangerous voltage!

Danger or risk of severe injury.
Disconnect the system and device
from the power supply before starting
the work.

Important!

Please note and follow the
documentation. This symbol is
intended to warn you of possib­le hazards that can occur during
installation, starting up and use.

C

Note.

6

UMG 605

m

m

m

Inspection on receipt

Fault free and safe use of this device requires
appropriate transport, proper storage, erection
and assembly as well as careful operation and
maintenance. If it can be assumed that safe
operation is no longer possible, the device
must be immediately taken out of service and
secured against being accidentally started up.
The device must be unpacked and packed
with the usual care, without the use of force
and only using suitable tools. The devices
must be visually inspected for perfect
mechanical condition. Please also note and
follow the installation instructions enclosed
with the device.
It can be assumed that safe operation is no
longer possible if the device, e.g.

• has visible damage,

• no longer works, despite intact mains power
supply,

• has been exposed to unfavourable conditions
(e.g. storage outside the permissible climatic
limits without adjustment to the ambient
climate, condensation, or similar) for a lengthy
period or was exposed to unfavourable effects
or loads during transport (e.g. fall from a large
height even if there is no visible external
damage, or similar).

Please check the scope of supply for
completeness before you start installing the
device.

All supplied options and design
versions are described on the delivery
note.

The installation and start-up instruc­tions also describe options which do
not belong to the scope of supply.

All screw-type terminals belonging to
the scope of supply are plugged into
the device.

7

UMG 605

Product No. Name

21 01 102 Battery, lithium CR2032, 3 V
08 02 427 RS232, Connection cable (UMG 605 – PC), 2m, 5 poles

1)

Refer to delivery note for product number.

2)

Design version.

Scope of supply

Number Product No. Name

1 52 16 xxx1) UMG605 XX

2)

1 33 03 085 Installation and start-up instructions.
1 51 00 116 CD with the following content:

- “GridVis” programming software,

- Functional descriptions, GridVis, UMG605 ..

- GSD file “u6050c2d.GSD” for profibus DP V0
1 10 01 807 Screw-type terminal, plug-in, 2 pin.
1 10 01 808 Screw-type terminal, plug-in, 3 pin.
1 10 01 809 Screw-type terminal, plug-in, 5 pin.
1 10 01 810 Screw-type terminal, plug-in, 6 pin.
1 89 10 051 Slot-head screwdriver (0.40x2 mm), ESD
1 08 01 505 Patch cable, 2m, twisted, grey (UMG605 - PC/switch connection).
1 52 00 008 RS485, external terminating resistor, 120 ohm

Available accessories

8

UMG 605

Notes on Use

Please read these operating instructions and
all other publications which have to be used
to work with this product (in particular for
installation, operation or maintenance).

Note and follow all safety instructions as well
as any warnings. If you do not follow the
instructions, personal injuries and/or damage
to the product could be the result.

Any unauthorised change or use of this device
which extends beyond the given mechanical,
electrical or other operating limits can cause
personal injuries and/or damage to the
product.

Any such unauthorised change is “misuse”
and/or “negligence” under the product's
warranty and therefore excludes the warranty
for cover of possible resulting injuries or
damage.

This device may be solely operated and
maintained by skilled persons.

Skilled persons are people who, on the basis
of their relevant training and experience, are
capable of identifying risks and avoiding
possible hazards which operation or
maintenance of the device can cause.

When using the device, any additional
legal and safety regulations required for the
respective use must be observed.

9

UMG 605

m

c

m

Important!
If the device is not operated according
to the instruction manual, protection
is no longer ensured and the device
can cause hazards.

Conductors made of individual wires
must be fitted with wire end ferrules.

Only pluggable screw terminals with
the same number of poles (pins) and
of the same type may be plugged
together.

10

UMG 605

Intended use

The UMG605 is intended to be used for the
measurement and calculation of electrical
variables such as voltage, current, energy,
work, harmonic components, etc. in building
installations, at distribution boards, circuit­breakers and busbar trunking systems.
Measuring-circuit voltages and currents must
originate from the same system.

The UMG605 is permanently installed in
control cabinets or small distribution boards.
It can be installed in any position.

The measurement results can be displayed,
stored and read out via serial interfaces and
further processed.

The voltage measurement inputs are designed
for measurements in low-voltage systems in
which rated voltages up to 300 V conductor
to earth and surge voltages of overvoltage
category III can occur.
The current measurement inputs of the
UMG605 are connected via external ../1A or
../5A current transformers.

Mains failure detection

The mains failure detection takes place via the
voltage measurement inputs. The selection
of voltage measurement inputs can be
configured using the GridVis software.

Mains failure stored energy time

The UMG605 bridges the following mains
failures at the auxiliary voltage input:

Mains voltage Stored energy time
230V AC max 80ms

Measurement in medium and high-voltage
systems takes place with current and voltage
transformers. Special safety requirements
must be complied, which are not dealt with in
any greater detail here.

The UMG605 fulfils the test requirements for
use in industrial areas.

Product Description

11

UMG 605

UMG605 features

- Measurement in IT, TT and TN systems,

- 4 voltage measurement inputs, - 4 current measurement inputs,

- Continuous scanning of the voltage and current measurement inputs,

- Measurement of power quality according to DIN EN61000-4-30:2009 class S,

- Flicker meter according to DIN EN61000-4-15:2011 class F3,

- Analysis and evaulation acoording to DIN EN50160 with software GridVis, which belongs to
the contents of delivery,

- Measurement of harmonics and interharmonics (Uln, Ull, I) according to DIN EN61000-4-7,

- Measurement of audio remote frequence (U, I, P, Q),

- Detection of transients >50µs and storage with up to 16000 scanning points

- Detection of more than 2400 measurement values,

- Fourier analysis 1st to 63th harmonic component for U, I, P (cons./supply) and Q (ind./cap.),

- Detection of events such us overvoltage, voltage drop, power failure and overcurrent,

- Datalogger / event memory (128MB Flashdisk),

- Real energy; DIN EN62053-22, accuracy class 0,5S with ../5A converter.

- Reactive energy; DIN EN62053-23, accuracy class 2r.

- 2 digital inputs, 2 digital outputs, temperature measurement input,

- LC display, 2 keys,

- Operating temperature range -10°C .. +55°C,

- Mounting on top hat rails 35 mm. Suitable for installation in distribution systems.

- Serial interfaces
Profibus DPV0,
RS485; modbus RTU, modbus master, BACnet (option),
RS232; modbus slave,
Ethernet; web server, EMAIL, BACnet (option),

- Programming own applications in Jasic,

12

UMG 605

Operating concept

You can program the UMG605 and call up
measured values in several ways.

• Directly at the device using 2 keys and the
display. You can change the values in the
parameter list (see Appendix) and call up
the measured values from the measured
value displays.

• Via the GridVis programming software.

• In devices with an ethernet interface, via
the homepage of the UMG605.

• Via the RS485 with the modbus protocol.
You can change and call up data with the
help of the modbus address list (is filed on
the enclosed data carrier).

Operation of the UMG605 via the integrated
display and the two keys only is described in
these operating instructions.
The GridVis programming software and the
homepage have their own “online help”.

Use the parameter list in the
appendix to these instructions for
programming at the UMG605 and
the modbus address list on the
data carrier included in the scope of
supply for programming via a serial
interface.

C

13

UMG 605

PC

UMG

605

Ethernet

PC

UMG

605

RS232

RS485

PC

UMG

605

RS232

GridVis programming software

The UMG605 can be programmed and read
out using the GridVis® programming software
included in the scope of supply. This requires
a PC to be connected to the UMG605 via a
serial interface/ethernet.

GridVis features

• Programming the UMG605.

• Configuring recordings.

• Analyse der ausgelesenen Daten nach EN
61000-2-4.

• Reading out recordings.

• Storing data in a database.

• Graphic display of measured values.

• Programming customer-specific applica­tions.

Fig. Connection of a UMG605 to a PC via an
interface converter.

Interface

converter

Fig. Connection of a UMG605 to a PC via the
ethernet.

Fig. Connection of a UMG605 to a PC via an
RS232 cable.

14

UMG 605

Methods of measurement

The UMG605 measures continuously and
calculates all effective values over a 200 ms
interval.
The UMG605 measures the real effective va­lue (TRMS) of the voltages and currents ap­plied to the measurement inputs.

15

UMG 605

Fig. Block diagram, UMG605 in TN system.

Three-phase 4-wire systems

The UMG605 can be used in three-phase
4 conductor systems (TN, TT system) (50 Hz,
60 Hz) with earthed PEN conductor. The
bodies of the electrical system are earthed.
The conductor to neutral conductor voltage
may not exceed 300 V AC.

The UMG605 is only suitable for environments
in which the impulse voltage withstand level of
4 kV (overvoltage category III) is not exceeded.

Fig. Table of rated voltages of the grid suitable
for the voltage inputs.

U

L-N

/ U

L-L

66 V / 115 V
120 V / 208 V
127 V / 220 V
220 V / 380 V
230 V / 400 V
240 V / 415 V
260 V / 440 V
277 V / 480 V

Maximum rated voltage

of the grid

UMG605

DC

AC/DC

PE

230/400V 50/60Hz

L2

L3

N

L1

4M

4M

4M

4M

L1 L3L2 N

4M

L4

Earthing the

system

Auxiliary power

Voltage measurement

16

UMG 605

Three-phase 3-wire systems

The UMG605 can be used in unearthed
three-phase 3 wire systems (IT system). The
conductor to conductor voltage may not
exceed 480V AC (50 Hz, 60 Hz).
The UMG605 is only suitable for environments
in which the impulse voltage withstand level of
4 kV (overvoltage category III) is not exceeded.

In the IT system the neutral point (star point)
of the voltage generator is not earthed. The
bodies of the electrical system are earthed.
Earthing via high-resistance impedance is
allowed.
IT systems are only allowed in certain systems
with their own transformer or generator.

U

L-L

66 V
115 V
120 V
127 V
200 V
230 V
240 V
260 V
277 V
347 V
280 V
400 V
415 V
440 V
480 V

Fig. Table of rated voltages of the grid suitable
for the voltage inputs.

Maximum rated voltage

of the grid

17

UMG 605

Fig. Block diagram, UMG605 in IT system
without N.

Fig. Block diagram, UMG605 in IT system with
N.

230/400V 50/60Hz

UMG605

DC

AC/DC

L2

L3

N

L1

4M

4M

4M

4M

L1

L3L2 N

4M

L4

Earthing the

system

Auxiliary power

Impedance

Voltage measurement

400V 50/60Hz

DC

AC/DC

L2

L3

Auxiliary power

Voltage measurement

4M

4M

4M

4M

L1

L3L2

4M

L4

Earthing the

system

Impedance

L1

UMG605

N

18

UMG 605

Installed position

The UMG605 can be installed in control
cabinets or in small distribution boards
according to DIN 43880. It is mounted on a
35 mm mounting v according to DIN EN 60715.
It can be installed in any position.

Fig. UMG605 on mounting rail according to
DIN EN 60715.

Installation

19

UMG 605

m

Power supply voltage

A power supply voltage is required for
operation of the UMG605. The type and
amount of power supply voltage required is
noted on the rating plate.

Before applying the power supply voltage,
ensure that the voltage and frequency match
the information given on the rating plate!

The connection cables for the power supply
voltage must be fused with a UL listed fuse
(6A type C).

- A disconnector or circuit-breaker
must be provided for the power
supply voltage in the building
installation.

- The disconnector must be installed
near the device and must be easy
for the user to reach.

- The switch must be labelled as a
disconnecting device for this device.

- Voltages which are above the
allowable voltage range can destroy
the device.

Power supply

voltage Uh

Disconnecting device

Fuse

Fig. Connection example for the power supply
voltage Uh.

Important!

The inputs for the supply voltage are
dangerous to touch!

c

Devices driven with direct currrent are
protected against polarity reversal.

m

20

UMG 605

m

c

Important!
The voltage measurement inputs are
hazardous live!

The UMG605 can only determine
measured values if a measurement­current voltage greater than 10 Veff
is applied to at least one voltage
measurement input.

Voltage measurement

The UMG605 is designed for the measurement
of alternating voltages in 300 V systems in
which category III overvoltages can occur.
The UMG605 can only determine measured
values if a measurement-current voltage
greater than 10 Veff is applied to at least one
voltage measurement input.

The following must be noted when selecting
the instrument leads for the voltage
measurement:

• The instrument leads required for the
voltage measurement must be suitable
for voltages up to 300 VAC to earth and
520 VAC conductor to conductor.

• Normal instrument leads must be fused by
an overcurrent protective device and routed
via disconnectors.

• Short-circuit proof instrument leads must be
routed via disconnectors only.

Overcurrent protective devices and
disconnectors must be positioned near the
device and must be easy for the user to reach.

Fig. Connection example: Voltage measurement
via short-circuit proof instrument leads.

Disconnector

L3

N

L1

L2

10A

(UL listed)

21

UMG 605

When connecting the voltage measurement,
the following must be observed:

• In order to disconnect the voltage and cur­rent, a suitable circuit breaker is to be pro­vided.

• The circuit breaker must be positioned near
to the UMG605, identified for the user and
easy to reach.

• Only use authorised UL/IEC excess current
protection devices and circuit breakers.

• Please use a 6A (UL-listed) cable circuit
breaker.

• The excess current protection device must
have a nominal value which is measured for
the short circuit current at the connection
point.

• Measurement voltages and measurement
currents must come from the same network.

Caution!

Contact with the voltage measure­ment inputs on the UMG605 is dan­gerous!

c

Caution!

The UMG605 is not suitable for meas­uring DC voltages.

c

Caution!

Voltages that exceed the permitted
nominal network voltages must be
connected using a voltage converter.

c

Caution!
The voltage measurement inputs
may not be used for voltage mea­surement in SELV circuits (low volt­age protector).

c

22

UMG 605

Main measurement, inputs 1-3

4-conductor connection

Fig. measurement using 3 voltage converters
in a three-phase 4 conductor network with
asymmetrical load.

Fig. measurement in a three-phase 4 conduc­tor network with asymmetrical load.

Fig. measurement using 2 voltage converters
in a three-phase 4 conductor network with
asymmetrical load.

Fig. measurement using a three-phase 4 con­ductor network with symmetrical load.

L1
L2
L3

N

L1 L2 L3 N

4w 3m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 3m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2i

L1
L2
L3

N

L1 L2 L3 N

4w 3m

hv

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 3m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 3m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2i

L1
L2
L3

N

L1 L2 L3 N

4w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2u

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2u

L1
L2
L3

N

L

1 L2 L3 N

4w 3m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L1 L2 L3 N

4w 2u

hv

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2u

I1 I2 I3

S1 S2 S1 S2 S1 S2

23

UMG 605

Fig. measurement in a three-phase 4 conduc­tor network with asymmetrical load.

Fig. measurement using 2 current converters
in a three-phase 3 conductor network with
symmetrical load.

L1
L2
L3

N

L1 L2 L3 N

4w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L

1 L2 L3 N

4w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

N

L1 L2 L3 N

4w 2u

I1 I2 I3

S1 S2 S1 S2 S1 S2

24

UMG 605

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

L1
L2
L3

L1 L2 L3 N

3w 3m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

L1
L2
L3

L1 L2 L3 N

3w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

hv

L1

N

L

1 L2 L3 N

2w 1m

L1
L2
L3

L

1 L2 L3 N

3w 3m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

L1
L2
L3

L1 L2 L3 N

3w 2u

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2u

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1

N

L

1 L2 L3 N

2w 1m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2i

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

hv

L1
L2
L3

L1 L2 L3 N

3w 2u

hv

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1 L2 L3 N

2w 2m

L1

L2

25

UMG 605

Fig. measurement in a single-phase 3 conduc­tor network. I3 and U3 are not calculated and
set to zero.

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

Fig. measurement in a three-phase 3 conduc­tor network with asymmetrical load.

Fig. measurement of a phase in a three-phase
4 conductor network.

L1
L2
L3

L1 L2 L3 N

3w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L1 L2 L3 N

3w 2m

hv

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1

N

L1 L2 L3 N

2w 1m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1
L2
L3

L

1 L2 L3 N

3w 2m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1 L2 L3 N

2w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1

L2

L1
L2
L3

L

1 L2 L3 N

3w 2m

hv

I

1 I2 I3

S1 S2 S1 S2 S1 S2

L1 L2 L3 N

2w 2m

I1 I2 I3

S1 S2 S1 S2 S1 S2

L1

L2

26

UMG 605

Auxiliary measurement, input V4

3-conductor connection

Fig. measurement with one current transform­er in a three-phase 4 conductor network with
symmetrical load

Fig. measurement with one current transform­er in a three-phase 3 conductor network with
symmetrical load.

Fig. measurement with one current transformer

m

In case of a three wire main mea­surement (input V1-V3), the auxiliary
measurement (input V4) cannot be
used as measuring input.

Be connected for the measurement
of the auxiliary measurement (V4) for
frequency estimation needs a voltage
to the main measurement.

m

L1
L2
L3

N

L4 N

4w 1m

I4

S1 S2

L1
L2
L3

L

4 N

4w 1m

I4

S1 S2

L1
L2
L3

L4 N

4w 1m

I4

S1 S2

L1
L2
L3

N

L

4 N

4w 1m

I4

S1 S2

L1
L2
L3

L

4 N

4w 1m

I4

S1 S2

L

L4 N

2w 1n

I4

S1 S2

N

27

UMG 605

Be connected for the measurement
of the auxiliary measurement (V4) for
frequency estimation needs a voltage
to the main measurement.

m

C

C

Frequency measurement

The UMG605 needs the network frequency to
measure and calculate measurement values.
The network frequency must be in a range be­tween 15Hz and 440Hz.

For automatic ascertainment (wide range) of
the frequency, an L1-N voltage larger than
10Veff must be applied to the voltage meas­urement input V1.

The measurement of power frequency hap­pens only at the measuring inputs of the main
measurement (V1, V2, V3).

Measurement voltages and measure­ment currents must come from the
same network.

In case of a three wire main mea­surement (input V1-V3), the auxiliary
measurement (input V4) cannot be
used as measuring input.

28

UMG 605

m

c

c

Current measurement

The UMG605 is designed for the connection of
current transformers with secondary currents
of ../1A and ../5A. Only alternating currents,
not direct currents, can be measured.
Each current measurement input can be
permanently loaded with 6A or for 1 second
with 100 A.

Earthing current transformers
If a connection is provided for earthing
the secondary winding, this must be
connected with earth.

Fig. Connection example, current mea­surement via current transformers.

Important!
The UMG605 is not suitable for the
measurement of direct voltages.

Attention!
The current inputs are live.

Loads

L3

L1

L2

N

S1

S2

S1

S2

S1

S2

S1

S2