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GOSSEN METRAWATT
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PROFI XTRA IQSP
Datasheet
21 pgs7.16 Mb0
Datasheet [de]
21 pgs3.15 Mb0
User guide
104 pgs3.23 Mb0
User guide [de]
104 pgs2.27 Mb0
Table of contents
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GOSSEN METRAWATT PROFI MTECH+ EM, PROFI XTRA IQSP User guide

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Operating Instructions
Series PROFITESTMASTER IQ
M
BASE+, MTECH+, MPRO, MXTRA, SECULIFEIP
Test Instruments for IEC 60364 / DIN VDE 0100
3-447-044-03
3/5.20
2 GMC-I Messtechnik GmbH
Key
Test Instrument and Adapter
1 Control panel with keys and
display panel with detent for ideal viewing angle
2 Eyelets for attaching the
shoulder strap 3 Rotary selector switch 4 Measuring adapter (2-pole) 5 Plug insert (country specific) 6 Test plug (with retainer ring) 7 Alligator clip (plug-on) 8 Test probes 9
▼ key ON/START *
10 I key I
N
/compens./Z
OFFSET
11 Contact surfaces for finger
contact
12 Test plug holder 13 Fuses 14 Holder for test probes (8)
Connections for Current Clamp, Probe and PRO-AB Adapter
15 Current clamp connection 1 16 Current clamp connection 2 17 Probe connection
Interfaces, Charger Jack
18 Bluetooth
®
19 USB slave for PC connection 20 RS 232 for connecting barcode
scanner or RFID reader
21 Jack for Z502P charger
Attention! Make sure that no batteries are inserted before connecting the charger.
22 Battery Compartment Lid
(compartment for batteries and replacement fuses)
Please refer to section 17 for explanations regarding control and display elements.
Battery level indicator
Meas. function
Meas. in progress /
Memory occupancy
Measured
Parameter
Display Panel
PE
Save value
Battery full
Battery OK
Battery weak
Battery (nearly)
Battery level indicator
BAT
BAT
BAT
BAT
Memory occupancy display
MEM
Memory half full
MEM
Memory full > transfer data to PC
Connection Test – Mains Connection Test ( section 18)
NPEL
NPEL
)(
Connection OK L and N reversed
NPEL NPEL
x
NPEL NPEL
x
x
RUN READY
Connection test section 18
depleted: U < 8 V
LPEN
x
LPEN
These operating instructions describe a tester with software version SW-VERSION (SW1) 3.4.X
* Can only be switched on with the key on the instrument
Bluetooth® active:
quantities
stopped
Overview of Device Settings and Measuring Functions
Switch Setting,
Descr. on
SETUP
page 9
Measurements with line voltage U
page 17
Appears for all meas. shown below:
IN
page 20
IF
page 21
ZL-PE
page 28
ZL-N
page 31
RE
page 32
Measurements at voltage-free objects RE
(MPRO) (MXTRA)
page 40
RLO
page 50
RISO RINS
page 47
SENSOR
page 53
EXTRA
page 54
AUTO
page 67
1
only MXTRA & SECULIFE IP
Picto­graph
Device Settings Measuring Functions
Brightness, contrast, time/date, Bluetooth® Language (D, GB, I, F, E, P, NL, S, N, FIN, CZ, PL)
Default settings < Test: LED, LCD, acoustic signal Rotary switch balancing,
battery test >
Single-phase measurement U
UL-N Voltage between L and N UL-PE Voltage between L and PE UN-PE Voltage between N and PE US-PE Voltage between probe and PE f Frequency
3-phase measurement U
UL3-L1 Voltage between L3 and L1 UL1-L2 Voltage between L1 and L2 UL2-L3 Voltage between L2 and L3 f Frequency
Phase sequence
U / U f / f
N
UIN Contact voltage ta Tripping time RE Earth resistance UIN Contact voltage I Residual current RE Earth resistance
ZL-PE Loop impedance IK Short-circuit current
ZL-N Line impedance IK Short-circuit current
UE Earth electrode voltage (probe/clamp)
RLO Low-resistance with polarity reversal
RLO+, RLO– Low-resistance, single-pole Roffset Offset resistance RINS Insulation resistance RE(INS) E U Voltage at the test probes UINS Test voltage
I
L/AMP
T/RF Temperature/humidity (in preparation)
U Voltage drop measurement ZST Standing surface insulation impedance kWh test Meter start-up test, earth contact plug
1
IL IMD Ures ta + I RCM e-mobility PRCD
2
Line voltage / nominal line voltage
N
Line frequency / nominal line frequency
2-pole measurement (ground loop) RE(L-PE)
2-pole measurement with country spec. plug
3-pole measurement (2-pole with probe)
Selective meas. with current clamp sensor
3-pole measurement
4-pole measurement
Selective measurement with current clamp sensor
2-clamp measurement (earth loop res.)
Soil resistivity
arth leakage resistance
Ramp: triggering/breakdown voltage
Residual or leakage current
Leakage current meas. with Z502S adapter
2
Check insulation monitoring device
2
Residual voltage test
2
Intelligent ramp
2
RCM (residual current monitor)
3
Electric vehicles at charging stations (IEC 61851)
2
Testing of PRCDs type S and K Automatic test sequences
only MXTRA 3 only MTECH+ & MXTRA
L-N -P E
3~
E
GMC-I Messtechnik GmbH 3
Table of Contents Page Page
1 Scope of delivery ............................................................. 5
2 Applications ..................................................................... 5
2.1 Using Cable Sets and Test Probes ...............................................6
2.2 Overview of Features Included
with PROFITEST MASTER & SECULIFE IP Device Variants ..........6
3 Safety Features and Precautions ..................................... 7
4 Initial Start-Up .................................................................. 7
4.1 Preparation for use ......................................................................7
4.2 Installing or Replacing the Battery Pack .....................................7
4.3 Switching the Instrument On/Off .................................................8
4.4 Battery Test .................................................................................8
4.5 Charging the Battery Pack in the Tester .....................................8
4.6 Device Settings ...........................................................................9
5 General Notes ................................................................ 14
5.1 Connecting the Instrument ........................................................14
5.2 Automatic Settings, Monitoring and Shut-Off ...........................14
5.3 Measurement Value Display and Memory .................................14
5.4 Testing Earthing Contact Sockets for Correct Connection ........14
5.5 Help Function ............................................................................15
5.6 Setting Parameters or Limit Values using RCD Measurement as an
Example .....................................................................................15
5.7 Freely Selectable Parameter Settings or Limit Values ..............16
5.7.1 Changing Existing Parameters ......................................................16
5.7.2 Adding New Parameters ...............................................................16
5.8 2-Pole Measurement with Fast or Semiautomatic Polarity Reversal ... 17
6 Measuring Voltage and Frequency ................................ 17
6.1 Single-Phase Measurement ......................................................17
),
L and PE
(U
) a
6.1.1 Voltage Between L and N (U
with Country-Specific Plug Insert, e.g. SCHUKO .............................17
6.1.2 Voltage between L – PE, N – PE and L – L
with 2-Pole Adapter Connection ...................................................18
6.2 3-Phase Measurement (line-to-line voltage) and Phase Sequence ..... 18
7
Testing RCDs .......................................................................19
7.1 Measuring Contact Voltage (with reference to nominal residual current) with
Nominal Residual Current .........................................................20
7.2
Special Testing for Systems and RCCBs .........................................21
7.2.1 Testing Systems and RCCBs with Rising Residual Current (AC) for Type
AC, A/F, B/B+ and EV/MI RCDs ....................................................21
7.2.2 Testing Systems and RCCBs with Rising Residual Current (AC) for Type
B/B+ and EV/MI RCDs (only MTECH+, MXTRA & SECULIFE IP) ......22
7.2.3 Testing RCCBS with 5  I
7.2.4 Testing of RCCBs which are Suited for
Pulsating DC Residual Current ......................................................23
7.3 Testing for Special RCDs ...........................................................23
7.3.1 System, Type RCD-S Selective RCCBs ..........................................23
7.3.2 PRCDs with Non-Linear Type PRCD-K Elements ............................24
7.3.3 SRCD, PRCD-S (SCHUKOMAT, SIDOS or comparable) ....................25
7.3.4 Type G or R RCCB .......................................................................25
7.4 Testing Residual Current Circuit Breakers in TN-S Systems .....26
7.5 Testing of RCD Protection in IT Systems with High Cable
Capacitance (e.g. in Norway) ....................................................27
7.6 Prüfen von 6 mA Fehlerstrom-Schutzeinrichtungen RDCDD /
RCMB .........................................................................................27
1
/3 Nominal Residual Current and Tripping Test with
L-N
N ............................................................. 22
L-PE
nd N and PE
(U
N-PE
8 Testing of Breaking Requirements Overcurrent Protective
Devices, Measurement of Loop Impedance and Determina­tion of Short-Circuit Current (functions Z
8.1 Measurements with Suppression of RCD Tripping ....................29
8.1.1 Measurement with Positive Half-Waves
(only MTECH+/MXTRA/SECULIFE IP) .............................................29
8.2 Evaluation of Measured Values .................................................30
Settings for Short-circuit current Calculation – Parameter IK ........30
8.3
9 Measuring Line Impedance (Z
function) ................... 31
L-N
10 Earthing Resistance Measurement (R
and IK) .... 28
L-PE
function) ........... 32
E
10.1 Earthing Resistance Measurement – Mains Operated ..............33
10.2 Earthing Resistance Measurement – Battery Powered
(only MPRO & MXTRA) ...............................................................34
10.3 Earthing Resistance, Mains Powered – 2-Pole Measurement with 2-Pole Adapter or Country-Specific Plug (Schuko)
without Probe ...........................................................................35
10.4 Earthing Resistance Measurement, Mains Powered – 3-Pole
Measurement: 2-Pole Adapter with Probe ...............................36
10.5 Earthing Resistance Measurement, Mains Powered – Measurement of Earth Electrode Voltage (U
10.6 Earthing Resistance Measurement, Mains Powered – Selective Earthing Resistance Measurement with Current Clamp
Sensor as Accessory .................................................................38
10.7 Earthing Resistance Measurement, Battery Operated – 3-Pole
(only MPRO & MXTRA) ...............................................................40
10.8 Earthing Resistance Measurement, Battery Operated – 4-Pole
(only MPRO & MXTRA) ...............................................................41
10.9 Earthing Resistance Measurement, Battery Operated – Selective (4-pole) with Current Clamp Sensor and PRO-RE Measuring
Adapter as Accessory (only MPRO & MXTRA) ........................... 43
10.10 Earthing Resistance Measurement, Battery Powered – Ground Loop Measurement (with current clamp sensor and transformer, plus PRO-RE/2 measuring adapter as accessory)
(only MPRO & MXTRA) ...............................................................44
10.11 Earthing Resistance Measurement, Battery Powered – Measurement of Soil Resistivity
(only MPRO & MXTRA) ...............................................................45
11
Measuring Insulation Resistance ........................................ 47
11.1 General ......................................................................................47
)
11.2 Special Case: Earth Leakage Resistance (R
E
12 Measuring Low-Value Resistance
function) ...........37
E
) .....................49
EISO
up to 200 Ohm
(protective conductor and equipotential bonding conductor) ...50
12.1 Measurements with Constant Test Current ..............................51
12.2 Protective Conductor Resistance Measurement with Ramp Curve – Measurements on PRCDs with Current-monitored Protective Conductor Using PROFITEST PRCD Test Adapter as Accessory 52
13 Measurement with Accessory Sensors .......................... 53
13.1 Current Measurement with Current Clamp Sensor ...................53
14
Special Functions – EXTRA Switch Position ..............................54
14.1 Voltage Drop Measurement (at ZLN) – U Function ................. 55
14.2 Measuring the Impedance of Insulating Floors and Walls
(standing surface insulation impedance) – ZST Function ......... 56
14.3 Testing Meter Start-Up with Earthing Contact Plug
– kWh Function (not SECULIFE IP) .............................................57
14.4 Leakage Current Measurement with PRO-AB Leakage Current Adapter as Accessory
Function (PROFITEST MXTRA & SECULIFE IP only) .............58
– I
14.5 Testing of Insulation Monitoring Devices – IMD Function
14.6
14.7
14.7.1 Applications ................................................................................62
14.8 Testing Residual Current Monitors
14.9 Testing the Operating States of Electric Vehicles at Charging
14.10 Test Sequences for Report Generation of Fault Simulations on
14.10.1 Selecting the PRCD under Test .....................................................65
14.10.2 Parameter Settings ......................................................................65
14.10.3 Test Sequence PRCD-S (single phase) – 11 Test Steps .................66
14.10.4 Test Sequence PRCD-S (three-phase) – 18 Test Steps ..................66
L
(PROFITEST MXTRA & SECULIFE IP only) ...................................59
Residual Voltage Test – Ures Function ( Intelligent Ramp – ta+ID Function (
– RCM Function (PROFITEST MXTRA only) ................................63
Stations per IEC 61851 (MTECH+ & MXTRA only) .....................64
PRCDs with PROFITEST PRCD Adapter (MXTRA only) ...............65
PROFITEST MXTRA
PROFITEST MXTRA
only) ....... 62
15 Automatic Test Sequences – AUTO Function ................. 67
15.1 General ......................................................................................67
15.2 Creating and Transferring Test Sequences with
IZYTRONIQ (step-by-step instructions) ......................................67
only) .....61
4 GMC-I Messtechnik GmbH
16 Database ........................................................................69
16.1 Creating Distributor Structures, General ...................................69
16.2 Transferring Distributor Structures ........................................... 69
16.3 Creating a Distributor Structure in the Test Instrument ........... 69
16.3.1 Creating Structures (example for electrical circuit) ......................... 71
16.3.2 Searching for Structural Elements ................................................71
16.4 Saving Data and Generating Reports ........................................ 72
16.4.1 Use of Barcode Scanners and RFID Readers .................................73
17 Operating and Display Elements ....................................74
18 LED Indications, Mains Connections and Potential
Differences .....................................................................76
19 Characteristic Values ...................................................... 86
20 Maintenance ...................................................................91
20.1 Firmware Revision and Calibration Information .......................91
20.2 Rechargeable Battery Operation, and Charging .......................91
20.2.1 Charging Procedure with Charger for Z502R ................................. 91
20.3 Fuses ........................................................................................91
20.4 Housing .....................................................................................91
21 Appendix .........................................................................92
21.1
Tables for the determination of maximum or minimum display values un-
der consideration of maximum measuring uncertainty: .......................92
21.2 At which values should/must an RCD actually be tripped?
Requirements for Residual Current Devices (RCDs) .................94
21.3 Testing Electrical Machines per DIN EN 60204 –
Applications, Limit Values .........................................................95
21.4 Periodic Testing per DGUV provision 3 (previously BGV A3) – Limit
Values for
Electrical Systems and Operating Equipment ........................... 96
21.5 List of Abbreviations and their Meanings ................................. 97
21.6 Keyword Index ..........................................................................98
21.7 Bibliography .............................................................................. 99
21.7.1 Internet Addresses for Additional Information ............................... 99
22 Repair and Replacement Parts Service Calibration Center*
and Rental Instrument Service .....................................100
23 Recalibration ................................................................100
24 Software .......................................................................100
25 Product Support ...........................................................101

1 Scope of delivery

1Test instrument 1 Earthing contact plug insert (country-specific) 1 2-pole measuring adapter and 1 cable for expansion into a
3-pole adapter (PRO-A3-II) 2 Alligator clips 1Shoulder strap 1 Compact Master Battery Pack (Z502H) 1Charger Z502R 1USB cable 1 DAkkS calibration certificate 1 Supplement Safety Information 1 Condensed operating instructions *
* Detailed operating instructions for download from our website at
www.gossenmetrawatt.com
1 Card with registration key for the
Software

2 Applications

This instrument fulfills the requirements of the applicable EU guidelines and national regulations. We confirm this with the CE marking. The relevant declaration of conformity can be obtained from GMC-I Messtechnik GmbH.
The PROFITEST MASTER and SECULIFE IP measuring and test instru­ments allow for quick and efficient testing of protective measures in accordance with DIN VDE 0100, part 600:2008 voltage installations; tests – initial tests), as well as (Austria), NIV/NIN SEV 1000 (Switzerland) and other country-spe­cific regulations. The test instrument is equipped with a microprocessor and com­plies with IEC 61557/DIN EN 61557/VDE 0413 regulations:
Part 1: General requirements Part 2: Insulation resistance Part 3: Loop resistance Part 4: Part 5: Earth resistance Part 6: Effectiveness of residual current devices (RCD) in TT, TN
Part 7: Phase sequence Part 10:Electrical safety in low-voltage systems up to 1000 V AC
Part 11:Effectiveness of type A and type B residual current moni-
Resistance of earth connection and equipotential bonding
and IT systems
and 1500 V DC – Equipment for testing, measuring or monitoring of protective measures
tors (RCMs) in TT, TN and IT systems
(Erection of low-
ÖVE-EN 1
The test instrument is especially well suited for:
•System setup
• Initial start-up
• Periodic testing
• Troubleshooting in electrical systems All of the values required for approval reports (e.g. for ZVEH) can
be measured with this instrument. All acquired data can be archived, in addition to the measurement
and test reports which can be printed out at a PC. This is of spe­cial significance where product liability is concerned.
The applications range of the test instruments covers all alternat­ing and three-phase current systems with nominal voltages of 230 V / 400 V (300 V / 500 V) and nominal frequencies of 16 50 / 60 / 200 / 400 Hz.
The following can be measured and tested with the instruments:
• Voltage / frequency / phase sequence
• Loop impedance / line impedance
• Residual current devices (RCDs)
• Insulation monitoring devices (IMDs) (only
• Residual current monitoring devices (RCMs) (only MXTRA)
• Earthing resistance / earth electrode potential
GMC-I Messtechnik GmbH 5
MXTRA
&
SECULIFE IP
2
/3/
)
• Standing surface insulation resistance / insulation resistance
• Earth leakage resistance
• Low-value resistance (potential equalization)
• Leakage currents with current transformer clamp
• Residual voltage (only MXTRA)
• Voltage drop
• Leakage current with leakage current adapter
• Meter start-up (not
SECULIFE IP
)
• Cable length
Refer to section 21.3 regarding testing of electrical machines in accordance with DIN EN 60204.
Refer to section 21.4 regarding periodic testing in accordance with DGUV provision 3 (previously BGV A3).

2.1 Using Cable Sets and Test Probes

• 2 or 3-pole measuring adapter included
• 2-pole measuring adapter with 10 m cable as optional acces­sory: PRO-RLO II (Z501P)
• KS24 cable set as optional accessory (GTZ3201000R0001)
Measurements per DIN EN 61010-031 may only be performed in environments in accordance with measuring categories III and IV with the safety cap attached to the test probe at the end of the measurement cable.
In order to establish contact inside 4 mm jacks, the safety caps have to be removed by prying open the snap fastener with a pointed object (e.g. the other test probe).

2.2 Overview of Features Included with PROFITEST MASTER & SECULIFE IP Device Variants

PROFITEST ... (Article Number)
PRO
TECH+
XTRA
(M535B)
(M535A)
M
MBASE+
(M535C)
Testing of residual current devices (RCDs)
measurement without tripping RCD
U
B
Tripping time measurement Measurement of tripping current I Selective, SRCDs, PRCDs, type G/R
F
✓
✓ ✓✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
AC/DC sensitive RCDs, type B, B+ and EV/MI ——✓✓ Testin g of IMDs ——— ✓ Testing of RCMs ——— ✓ —
✓
Testing for N-PE reversal
Measurement of loop impedance Z
L-P E
/ Z
L-N
Fuse table for systems without RCDs Without tripping the RCD, fuse table ——✓✓ With 15 mA test current
1
without tripping the
RCD
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
Earthing resistance RE (mains operation)
I-U measuring method (2/3-wire measuring method via measuring adapter: 2-wire/2-wire +
✓
✓ ✓✓
probe)
Earthing resistance RE (battery operation)
3 or 4-wire measurement via PRO-RE adapter
Soil resistivity
E (battery operation)
(4-wire measurement via PRO-RE adapter)
— ✓ — ✓ —
— ✓ — ✓ —
Selective earthing resistance RE (mains opera­tion)
with 2-pole adapter, probe, earth electrode
and current clamp sensor (3-wire measuring
✓
✓ ✓✓
method)
Selective earthing resistance RE (battery operation)
with probe, earth electrode and current clamp sensor (4-wire measuring method via PRO-RE
— ✓ — ✓ —
adapter and current clamp sensor)
Earth loop resistance R
with 2 clamps (current clamp sensor direct and current clamp transformer via PRO-RE/2
(battery operation)
ELOOP
— ✓ — ✓ —
adapter)
Measurement of equipotential bonding R
automatic polarity reversal
Insulation resistance R
variable or rising test voltage (ramp)
Voltage U
/ U
L-N
L-P E
/ U
INS
N-PE
,
/ f
,
LO
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
Special measurements Leakage current (with clamp) I
, I
L
AMP
Phase sequence Earth leakage resistance R
E(ISO)
Voltage drop (U) Standing-surface insulation Z
ST
Meter start-up (kWh-Test) Leakage current with PRO-AB adapter (IL) Residual voltage test (Ures) — Intelligent ramp (ta + I) Electric vehicles at charging stations
(IEC 61851) Report generation of fault simulations on
PRCDs with PROFITEST PRCD adapter
Features Selectable user interface language
2
Memory (database for up to 50,000 objects) Automatic test sequence function RS 232 port for RFID/barcode scanner USB port for data transmission
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓—
—
— — — —
—
— —
——✓✓—
———
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
Interface for Bluetooth® —— ✓✓ PC database and report generating software
IZYTRONIQ BUSINESS Starter Measuring category:
CAT III 600 V / CAT IV 300 V DAkkS calibration
1
The so-called live measurement is only advisable if there is no bias current within
the system. Only suitable for motor circuit breaker with low nominal current
2
currently available languages: D, GB, I, F, E, P, NL, S, N, FIN, CZ, PL
✓
✓ ✓✓
✓
✓ ✓✓
✓
✓ ✓✓
M
M
(M535D)
SECULIFE IP
✓ ✓ — ✓ —
✓
—
(M535E)
✓ ✓ ✓ ✓ ✓
✓
✓ ✓
✓
✓
✓
✓
✓
✓
✓ ✓ ✓ ✓ ✓
✓
✓ ✓ ✓ ✓ ✓ ✓
✓
✓
✓
6 GMC-I Messtechnik GmbH

3 Safety Features and Precautions

Attention!
!
Note
Attention!
!
!
XY123
2018-07
D-K
15080-01-01
Consecutive number
Registration number Date of calibration (year – month)
Deutsche Akkreditierungsstelle GmbH – calibration lab
This instrument fulfills all requirements of applicable European and national EC directives. We confirm this with the CE mark. The rel­evant declaration of conformity can be obtained from GMC-I Messtechnik GmbH.
The electronic measuring and test instrument is manufactured and tested in accordance with safety regulations IEC 61010-1/ DIN EN 61010-1/VDE 0411-1 and EN 61557.
Safety of the operator, as well as that of the instrument, is only assured when it is used for its intended purpose.
Read the operating instructions thoroughly and carefully before using your instrument. Follow all instructions contained therein. Make sure that the operating instructions are available to all users of the instrument.
Tests may only be executed by a qualified electrician.
Grip and hold the test plug and test probes securely when they have been inserted, for example, into a socket. Danger of injury exists if tugging at the coil cord occurs, which may cause the test plug or test probes to snap back.
The measuring and test instrument may not be placed into service:
• If the battery compartment lid has been removed
• If external damage is apparent
• If connector cable or measuring adapters are damaged
•If the instrument no longer functions flawlessly
• After a long period of storage under unfavorable conditions (e.g. humidity, dust, temperature)
Exclusion of Liability
When testing systems with RCCBs, the latter may switch off. This may
occur even though the test does not normally provide for it. Leak­age currents may be present which, in combination with the test current of the test instrument, exceed the shutdown threshold value of the RCCB. PCs which are operated in proximity to such RCCB systems may switch off as a consequence. This may result in inadvertent loss of data. Before conducting tests, precautions should therefore be taken to ensure that all data and programs are adequately saved, and the computer should be switched off if necessary. The manufacturer of the test instrument assumes no liability for any direct or indirect damage to equipment, comput­ers, peripheral equipment or data bases when performing tests.
Opening of Equipment / Repair
The equipment may be opened only by authorized service per­sonnel to ensure the safe and correct operation of the equipment and to keep the warranty valid.
Even original spare parts may be installed only by authorized ser­vice personnel.
In case the equipment was opened by unauthorized personnel, no warranty regarding personal safety, measurement accuracy, conformity with applicable safety measures or any consequential damage is granted by the manufacturer.
Any warranty claims will be forfeited when the warranty seal has been damaged or removed.
Meaning of Symbols on the Instrument
Warning concerning a point of danger (Attention, observe documentation!)
Protection class II device
Charging socket for extra-low direct voltage (charger Z502R)
Attention! Only rechargeable batteries may be inserted when the char­ger is connected.
This device may not be disposed of with the trash. Fur­ther information regarding the WEEE mark can be accessed on the Internet at www.gossenme­trawatt.com by entering the search term “WEEE”.
EC mark of conformity
Any warranty claims will be forfeited when the warranty
seal has been damaged or removed.
Calibration Seal (blue seal):
See also “Recalibration” on page 100.
Data Backup
We advise you to regularly transmit your stored data to a PC in order to prevent potential loss of data in the test instrument.
We assume no responsibility for any data loss.

4 Initial Start-Up

4.1 Preparation for use

Before putting the test instrument into service and using it for the first time, the lamination sheets must be removed from the two sensor surfaces (finger contacts) of the test plug in order to ensure that contact voltage is reliably detected.

4.2 Installing or Replacing the Battery Pack

Before opening the battery compartment, disconnect the instrument from the measuring circuit (mains) at all poles!
See also section 20.2 on page 91 concerning charging the Kompkt Akku Pack Master (Z502H) and the battery charger Z502R.
Use Kompakt Akku Pack Master (Z502H), if possible, which is either included in the standard equipment or available as an accessory, with heat-sealed battery cells. Do not use any battery holders which can
be filled with individual batteries. This ensures that always a com­plete set of batteries is replaced and all rechargeable batteries are inserted with correct polarity in order to prevent leakage from the batteries.
Only use commercially available battery packs if you charge them exter­nally. The quality of these sets cannot be verified and this may, in
unfavourable cases, lead to heating and deformation (during the charging in the device). Dispose the battery packs or the individual rechargeable batteries in an environmentally sound fashion when their service life has nearly expired (approx. 80% charging capacity).
➭ Loosen the slotted screw for the battery compartment lid on
the back and remove the lid.
➭ Remove the discharged battery pack or the battery holder.
When Using a Battery Holder:
It is imperative that you pay attention to the correct po­larity when inserting the rechargeable batteries. If a bat­tery has been inserted with incorrect polarity, it is not detected by the instrument and may lead to battery leak­age. Individual rechargeable batteries may only be charged externally.
➭ Slide the new battery pack/filled battery holder into the battery
compartment. The holder can only be inserted to its proper position.
➭ Replace the lid and re-tighten the screw.
GMC-I Messtechnik GmbH 7

4.3 Switching the Instrument On/Off

Attention!
!
BAT
The test instrument is switched on by pressing the ON/START key. The menu which corresponds to the momentary selector switch position is displayed.
The instrument can be switched off manually by simultaneously pressing the MEM and HELP keys.
After the period of time selected in the SETUP menus has elapsed, the instrument is switched off automatically (see “Device Set­tings”, section 4.6.

4.4 Battery Test

If battery voltage has fallen below the permissible lower limit, the pictograph shown at the right appears. “Low Batt!!!” is also displayed along with a battery sym­bol. The instrument does not function if the batteries have been depleted excessively, and no display appears.

4.5 Charging the Battery Pack in the Tester

Use only the charger Z502R to charge the Kompakt Akku­Pack Master (Z502H) which has already been inserted into
the test instrument.
Make sure that the following conditions have been fulfilled be­fore connecting the charger to the charging socket:
– Kompakt Akku-Pack Master (Z502H) has been
installed, no commercially available battery packs, no individual rechargeable batteries, no standard batteries
– The test instrument has been disconnected from the
measuring circuit at all poles
– The instrument must remain off during charging.
Refer to section 20.2.1 with regard to charging the battery pack which has been inserted into the tester.
If the batteries or the battery pack have not been used or recharged for a lengthy period of time (> 1 month), thus resulting in excessive depletion:
Observe the charging sequence (indicated by LEDs at the char­ger) and initiate a second charging sequence if necessary (dis­connect the charger from the mains and from the test instrument to this end, and then reconnect it).
Please note that the system clock stops in this case and must be set to the correct time after the instrument has been restarted.
8 GMC-I Messtechnik GmbH

4.6 Device Settings

SETUP
GMC-I Messtechnik GmbH 9
10 GMC-I Messtechnik GmbH
Significance of Individual Parameters
Note
Note
Attention!
!
0a
0b
2 2
3c
3e
3f
Return to previous menu
Increase brightness
Decrease brightness
Increase contrast
Decrease contrast
3g
➭ Press ESC in order to return to the main menu.
Test Instrument On-Time
The period of time after which the test instrument is automatically shut off can be selected here. This selection has a considerable influence on the service life and the charging status of the batter­ies.
On-Time for LCD Illumination
The period of time after which LCD illumination is automatically shut off can be selected here. This selection has a considerable influence on the service life and the charging status of the batter­ies.
Submenu: Rotary Switch Balancing
Proceed as follows in order to precision adjust the rotary switch:
1 Press the TESTS Rotary Switch / Battery Test softkey in order to
access the rotary switch balancing menu.
2 Then press the softkey with the rotary switch symbol. 3 Turn the rotary switch clockwise to the next respective measuring
function (IDN first after SETUP).
4 Press the softkey which is assigned to the rotary switch at the LCD.
After pressing this softkey, the display is switched to the next mea­suring function. Labeling in the LCD image must correspond to the actual position of the rotary switch.
level bar in the LCD image of the rotary switch should be
The located in the middle of the black field, and is supplemented at the right-hand side with a number within a range of -1 to 101. This value should be between 45 and 55. In the case of -1 or 101, the position of rotary knob does not coincide with the measuring function selected at the LCD.
5 If the displayed value is not within this range, readjust the
position by pressing the readjust softkey. A brief acoustic signal acknowledges readjustment.
Data and sequences are lost when the language, the profile or DB mode is changed, or if the in­strument is reset to default val­ues!
Back up your structures, measurement data and se­quences to a PC before pressing the respective key. The prompt window shown at the right asks you to confirm deletion.
User Interface Language (CULTURE)
➭ Select the desired country setup with the appropriate country
code.
Default Settings (GOME SETTING)
The test instrument is returned to its original default settings when this key is activated.
Attention: all existing structures, data and sequences are deleted, see note above!
Adjusting Brightness and Contrast
➭ Press ESC in order to return to the main menu.
Submenu: Battery Level Query
If battery voltage has dropped to 8.0 V or less, the UL/RL LED lights up red and an acoustic signal is generated as well.
GMC-I Messtechnik GmbH 11
If labeling in the LCD image of the rotary switch does not correspond with its actual position, a continuous acous­tic signal is generated as a warning when the readjust softkey is pressed.
6 Return to point 2 and continue. Repeat this procedure until all
rotary switch functions have been tested, and if necessary readjusted.
Measuring Sequence
If battery voltage drops to below 8.0 V during the course of a measuring sequence, this is indicated by means of a pop-up window only. Measured val­ues are invalid. The measurement results cannot be saved to memory.
DB MODE – Presenting the Database in Text Mode or ID Mode
Creating Structures in TXT MODE
By default, the database in the test instrument is set to text mode, „TXT“ is indicated in the header. You can create structural ele­ments in the test instrument und add designations in plain text, e. g. Customer XY, Distributor XY and Electrical Circuit XY.
Creating Structures in ID MODE
Note
Note
3h
When Bluetooth® is active (= ON), the
Bluetooth
®
icon
appears in the header instead of BAT, and an interface icon appears instead of MEM.
A closed interface icon indicates an active Bluetooth connection with data transmission.
Figure 1
Figure 2
Figure 3 Figure 4
Alternatively, you can work in the ID mode. „ID“ is indicated in the header. You can create structural elements in the test instrument which can be labelled with ID numbers at your discretion.
Activate the Bluetooth® interface at the test instrument during data transmission only. Interface power consump­tion reduces battery service life when activated continu­ously.
In the test instrument, structures can either be created in text mode or in ID mode. In the report software, however, designations and ID numbers are always allocated.
If no texts or ID numbers have been allocated when creating the structures in the test instrument, report software generates the missing entries automatically. They can be subsequently edited in the report software and transferred back to the test instrument if required.
Switching
Bluetooth® On/Off (
MTECH+/MXTRA/
SECULIFE IP
only)
If several test instruments are within range during authentication, the respective name should be changed in order to rule out the possibility of a mix-up. Blanks may not be used. The default pin code, namely “0000”, can be changed, but this is unnecessary as a rule. As shown in figure 3, the MAC address of the test instru­ment is displayed in the footer as hardware information.
Render your test instrument visible prior to authentication, and subsequently invisible for security reasons.
Steps Required for Authentication
Make sure that the test instrument is within range of the PC (roughly 5 to 8 meters). Activate Bluetooth (see figure 1) and at your PC.
The function selector switch must be in the SETUP position to this end.
Make sure that the test instrument (see figure 3) and your PC are visible for other Bluetooth
®
devices: In the case of the test instrument, the word “visible” must be dis- played underneath the eye symbol. Use your Bluetooth
®
PC driver software to add a new Bluetooth® device. In most cases, this is accomplished with the help of the “Add new connection” or “Add Bluetooth® device” button.
The following steps may vary, depending on which Bluetooth driver software is used. Basically, a PIN code must be entered at the PC. The default setting for the PIN code is “0000”, and is dis­played in the main Bluetooth
®
menu (see figure 1) at the test instru­ment. Subsequently, or previously, an authentication message must be acknowledged at the test instrument (see figure 4).
If authentication has been successful, a corresponding message appears at the test instrument. Furthermore, the authenticated PC is displayed in the “Trusted Devices” menu at the test instru­ment (see figure 2).
The MTECH+, MXTRA or the SECULIFE IP should now also be listed as a device in your Bluetooth
®
PC driver software. Further informa­tion is also provided here regarding the utilized COM port. With the help of your Bluetooth® PC driver software, you’ll need to find out which COM port is used for the Bluetooth port is frequently displayed after authentication, but if this is not the case, this information provided by your Bluetooth software.
The report software includes a function for automatically ascertaining the uti­lized COM port after successful authentication has been completed (see screen­shot below).
®
at the test instrument
®
®
connection. This
®
PC driver
PC
If the test instrument is within range of your PC (5 to 8 meters), wireless data exchange can now be initiated with the help of report software by clicking Bluetooth
®
in the “Extras” menu. The number of the correct COM port (e.g. COM40) must be entered to report software when data exchange is started (see screenshot below).
Alternatively, the COM port number can be selected automatically by clicking the “Find Bluetooth Device” item in the menu.
If your PC is equipped with a Bluetooth® interface, wireless com­munication is possible between the MTECH+, MXTRA or SECULIFE IP and report user software for the transfer of data and test struc­tures.
One-time only authentication of the respective PC with the test instrument is a prerequisite for wireless data exchange. The func­tion selector switch must be in the SETUP position to this end. The correct Bluetooth software before each data transmission sequence.
12 GMC-I Messtechnik GmbH
®
COM port must also be selected in report
Firmware Revision and Calibration Information (example)
Note
4
5
Add a new inspector
Accept letter/character
Select letter/character
Select letter/character
Delete letter/character Shift: upper/lowercase letters,
vowel mutations, special chars.
? Accept name
Select inspector
Select inspector
Accept inspector
Delete inspector
➭ Press any key in order to return to the main menu.
Firmware Update with the Firmware Update Tool
The layout used for the entire range of the test instruments makes it possible to adapt instrument software to the latest standards and regulations. Beyond this, suggestions from customers result in continuous improvement of the test instrument software, as well as new functions.
In order to assure that you can take advantage of all of these ben­efits without delay, the Firmware Update Tool allows you to quickly and completely update your test instrument software on­site (see section 24).
The user interface can be set to either English, German or Italian.
Selecting, Adding or Deleting an Inspector
See also section 5.7 page 16 regarding the entry of a text.
As a registered user, you’re entitled to download the Firmware Update Tool and the current firmware version free of charge from the myGMC page.
GMC-I Messtechnik GmbH 13

5 General Notes

Note
Note
Attention!
!

5.1 Connecting the Instrument

For systems with earthing contact sockets, connect the instru­ment to the mains with the test plug to which the appropriate, country-specific plug insert is attached. Voltage between phase conductor L and the PE protective conductor may not exceed 253 V! Poling at the socket need not be taken into consideration. The instrument detects the positions of phase conductor L and neu­tral conductor N and automatically reverses polarity if necessary. This does not apply to the following measurements:
– Voltage measurement in switch position U – Insulation resistance measurement – Low-value resistance measurement
The positions of phase conductor L and neutral conductor N are identified on the plug insert.
If measurement is to be performed at three-phase outlets, at dis­tribution cabinets or at permanent connections, the measuring adapter must be attached to the test plug (see also table 16.1). Connection is established with the test probes: one at PE or N and the other at L.
The 2-pole measuring adapter must be expanded to 3 poles with the included measurement cable for the performance of phase sequence testing.
Contact voltage (during RCCB testing) and earthing resistance can be, and earth-electrode potential, standing surface insulation resistance and probe voltage must be measured with a probe. The probe is connected to the probe connector socket with a 4 mm contact protected plug.

5.2 Automatic Settings, Monitoring and Shut-Off

The test instrument automatically selects all operating conditions which it is capable of determining itself. It tests line voltage and frequency. If these lie within their valid nominal ranges, they appear at the display panel. If they are not within nominal ranges, prevailing voltage (U) and frequency (f) are displayed instead of U and f
.
N
Contact voltage which is induced by test current is monitored for each measuring sequence. If contact voltage exceeds the limit value of > 25 V or > 50 V, measurement is immediately inter­rupted. The U
If battery voltage falls below the allowable limit value the instrument cannot be switched on, or it is immediately switched off.
The measurement is interrupted automatically, or the measuring sequence is blocked (except for voltage measuring ranges and phase sequence testing) in the event of:
• Impermissible line voltages (< 60 V, > 253 V / > 330 V / > 440 V or > 550 V) for measurements which require line volt­age
• Interference voltage during insulation resistance or low resis­tance measurements
• Overheating at the instrument. As a rule, excessive temperatures only occur after approxi­mately 50 measurement sequences at intervals of 5 seconds, when the rotary selector switch is set to the Z position. If an attempt is made to start a measuring sequence, an appropriate message appears at the display panel.
The instrument only switches itself off automatically after comple­tion of an automatic measuring sequence, and after the predeter­mined on-time has expired (see sectionl 4.3). On-time is reset to its original value as defined in the setup menu, as soon as any key or the rotary selector switch is activated.
The instrument remains on for approximately 75 seconds in addi­tion to the preset on-time for measurements with rising residual current in systems with selective RCDs.
The instrument always shuts itself off automatically!
LED lights up red.
L/RL
L-PE
oder Z
L-N

5.3 Measurement Value Display and Memory

The following appear at the display panel:
• Measurement values with abbreviations and units of measure
• Selected function
• Nominal voltage
• Nominal frequency
• Error messages Measurement values for automatic measuring sequences are
stored and displayed as digital values until the next measurement sequence is started, or until automatic shut-off occurs. If the upper range limit is exceeded, the upper limit value is dis­played and is preceded by the “>” symbol (greater than), which indicates measurement value overrun.
The depiction of LEDs in these operating instructions may vary from the LEDs on the actual instrument due to product improvements.

5.4 Testing Earthing Contact Sockets for Correct Connection

The testing of earthing contact sockets for correct connection prior to protective measures testing is simplified by means of the instrument’s error detection system.
The instrument indicates improper connection as follows:
• Impermissible line voltage (< 60 V or > 253 V): The MAINS/NETZ LED blinks red and the measuring sequence is disabled.
• Protective conductor not connected or potential to earth 50 V at 50 Hz (switch position U – single-phase measurement): If the contact surfaces are touched (finger contact*) while PE is being contacted (via the country-specific plug insert, e.g. SCHUKO, as well as via the PE test probe at the 2-pole adapter) PE appears (only after a test sequence has been started). The U
N
the test plug must be touched directly with the finger/palm without any skin protection applied, see also section 4.1.
* for reliably detecting the contact voltages, both sensor surfaces at
• Neutral conductor N not connected (during mains dependent measurements): The MAINS/NETZ LED blinks green.
• One of the two protective contacts is not connected: This is checked automatically during testing for contact cur­rent U leads to one of the following displays, depending upon poling
. Poor contact resistance at one of the contacts
IN
of the plug: – Display at the connection pictograph:
PE interrupted (x), or underlying protective conductor bar interrupted with reference to keys at the test plug
Cause: voltage measuring path interrupted Consequence: measurement is disabled
– Display at the connection pictograph:
Overlying protective conductor bar inter­rupted with reference to keys at the test plug
Cause: current measuring path interrupted Consequence: no measured value display
See also “LED Indications, Mains Connections and Potential Differences” beginning on page 76.
Reversal of N and PE in a system without RCCBs cannot be detected and is not indicated by the instrument. In a system including an RCCB, the RCCB is tripped during “contact voltage measurement without RCCB tripping” (automatic Z PE are reversed.
and RCD/FI LEDs light up red as well.
L/RL
measurement), insofar as N and
L-N
14 GMC-I Messtechnik GmbH

5.5 Help Function

The following information can be displayed for each switch posi­tion and basic function after it has been selected with the rotary selec-
tor switch:
• Wiring diagram
• Measuring range
• Nominal range of use and measuring uncertainty
• Nominal value
➭ Press the HELP key in order to query online help: ➭ If several pages of help are available for the respective mea-
suring function, the HELP key must be pressed repeatedly.
➭ Press the ESC key in order to exit online help.

5.6 Setting Parameters or Limit Values using RCD Measurement as an Example

1 Access the submenu for setting the desired parameter. 2 Select a parameter using the orscroll key. 3 Switch to the setting menu for the selected parameter with the scroll
key.
4 Select a setting value using the orscroll key. 5 Acknowledge the setting value with the key. This value is transferred to
the setting menu.
6 The setting value is not permanently accepted for the respective measure-
ment until menu. You can return to the main menu by pressing ESC instead of without accepting the newly selected value.
✓ is pressed, after which the display is returned to the main
✓,
Parameter Lock (plausibility check)
Individually selected parameter settings are checked for plausibil­ity before transfer to the measurement window.
If you select a parameter setting which doesn’t make sense in combination with other parameter settings which have already been entered, it’s not accepted. The previously selected parame­ter setting remains unchanged.
Remedy: Select another parameter setting.
GMC-I Messtechnik GmbH 15

5.7 Freely Selectable Parameter Settings or Limit Values

Note
Note
Select the EDIT menu.
Select value / U/M.
Select value / U/M.
Accept value / U/M.
Delete characters.
✓ Save value (to list).
Select the EDIT+ menu.
Select value / U/M.
Select value / U/M.
Accept value / U/M.
Delete characters.
✓ Save value (to list).

5.7.1 Changing Existing Parameters

Individual parameters can be changed for certain measuring func­tions, i.e. adjusted within predetermined limits.
The EDIT menu doesn’t appear until after switching to the right-hand column and selecting the editable parameter .
Example for RLO Measuring Function – Parameter: LIMIT RLO
1 Open the submenu for setting the desired parameter (no fig-
ure, see section 5.6).
2 Select the editable parameter (identified with the icon)
with the or  scroll key.
3 Select the edit menu by pressing the key.

5.7.2 Adding New Parameters

For certain measuring functions, additional values within pre­defined limits can be added in addition to the fixed values.
The EDIT menu doesn’t appear until after switching to the right-hand column.
Example for Measuring Function IN – Parameter: I
1 Open the submenu for setting the desired parameter (no fig-
ure, see section 5.6).
2 Select the edit menu by pressing the key.
N
4 Select the respective characters with the left or right cursor
key. The character is accepted by pressing the key. The value is acknowledged by selecting key.
Observe the predefined limits for the new setting value. Enter any places to the right of the decimal point as well.
16 GMC-I Messtechnik GmbH
✓ and then pressing the
3 Select the respective characters with the left or right cursor
key. The character is accepted by pressing the key. The value is acknowledged by selecting key. The new parameter is added to the list.
Observe the predefined limits for the new setting value. Enter any places to the right of the decimal point as well.
✓ and then pressing the
5.8 2-Pole Measurement with Fast or Semiautomatic Polarity
Note
L1-N L2-N
L3-N L1-L2 L2-L3 L1-L3
N-PE L1-PE L2-PE L3-PE
L+N-PE
L1-N
L2-N
L3-N L1-L2 L2-L3 L1-L3
Z
L-PE
Z
L-N
L1-PE L2-PE L3-PE
R
iso
L1-PE L2-PE L3-PE
N-PE L1-N L2-N
L3-N L1-L2 L2-L3 L1-L3
U
L1-N L2-N
L3-N L1-L2 L2-L3 L1-L3
N-PE L1-PE L2-PE L3-PE
L+N-PE
L1-N
L2-N
L3-N L1-L2 L2-L3 L1-L3
Z
L-PE
Z
L-N
L1-PE L2-PE L3-PE
R
iso
L1-PE L2-PE L3-PE
N-PE L1-N L2-N
L3-N L1-L2 L2-L3 L1-L3
U
U
Reversal
Fast, semiautomatic polarity reversal is possible for the following measurements:
• Voltage U
• Loop impedance Z
• Internal line resistance measurement Z
• Insulation resistance, R
LP-E
L-N
INS
Fast Polarity Reversal at the Test Plug
The polarity parameter is set to AUTO. Fast and convenient switching amongst all polarity variants, or
switching to the parameter settings submenu, is possible by pressing the I
key at the instrument or the test plug.
N

6 Measuring Voltage and Frequency

Select Measuring Function
Switch Between Single and 3-Phase Measurement
Press the softkey shown at the left in order to switch back and forth between single and 3-phase mea­surement. The selected phase measurement is dis­played inversely (white on black).

6.1 Single-Phase Measurement Connection

Semiautomatic Polarity Reversal in Memory Mode
The polarity parameter is set to AUTO. If testing is to be conducted with all polarity variants, automatic
polarity changing takes place after each measurement when the “Save” button is pressed.
Polarity variants can be skipped by pressing the I instrument or the test plug.
key at the
N
A probe must be used in order to measure probe voltage U
6.1.1 Voltage Between L and N (U a
nd N and PE
(U
) with Country-Specific Plug Insert, e.g.
N-PE
SCHUKO
Press the softkey shown at the left in order to switch back and forth between the country-specific plug insert, e.g. SCHUKO, and the 2-pole adapter. The selected connection type is displayed inversely (white on black).
S-PE
L-N
.
),
L and PE
(U
L-P E
)
GMC-I Messtechnik GmbH 17
If you look at the country-specific plug insert, e.g. SCHUKO, from the front, you can see the embossed let­ters „L“ and „N“. During voltage measurement there is no automatic polarity reversal. You can thus determine to which terminal in the mains socket the phase is applied. If (line) voltage is displayed for UL-PE, the phase is applied to terminal L indicated on the plug. If (line) voltage is dis­played for N-PE, the phase is applied to the terminal for N in the socket.
6.1.2 Voltage between L – PE, N – PE and L – L
Note
2
1
Clockwise
Counter-Clockwise
with 2-Pole Adapter Connection
Press the softkey shown at the left in order to switch back and forth between the country-specific plug insert, e.g. SCHUKO, and the 2-pole adapter. The selected connection type is displayed inversely (white on black).
Refer to section 5.8 regarding 2-pole measurement with fast or semiautomatic polarity reversal.

6.2 3-Phase Measurement (line-to-line voltage) and Phase Sequence

Connection
The measuring adapter (2-pole) is required in order to connect the instrument, and can be expanded to a 3-pole measuring adapter with the included measure­ment cable.
➭ Press softkey U3~.
A clockwise phase sequence is required at all 3-phase electrical outlets.
• Measurement instrument connection is usually problematic with
CEE outlets due to contact problems. Measurements can be executed quickly and reliably without con­tact problems with the help of the Z500A variable plug adapter set available from GMC.
• Connection for 3-wire measurement, plug L1-L2-L3 in clockwise
direction as of PE socket
Direction of rotation is indicated by means of the following dis­plays:
See section 18 regarding all indications for the mains connection test.
Voltage Polarity
If the installation of single-pole switches to the neutral conductor is prohibited by the standards, voltage polarity must be tested in order to assure that all existing single-pole switches are installed to the phase conductors.
18 GMC-I Messtechnik GmbH

7 Testing RCDs

Note
Attention!
!
I
N
3
-------
I
N
(measurement up to 1000 ms)
t
a
I
a
t
S
The testing of residual current devices (RCDs) includes:
• Visual inspection
•Testing
• Measurement Use the test instrument for testing and measurement.
Test Standard
The following must be substantiated per DIN VDE 0100 part 600: 2008:
– Contact voltage occurring at nominal residual current may not
exceed the maximum allowable value for the system.
– Tripping of the RCCB must occur within 400 ms (1000 ms for
selective RCDs) at nominal residual current.
Measuring Method
The following must be substantiated by generating a fault current downstream from the RCD:
• That the RCD is tripped no later than upon reaching its nomi­nal fault current value
• That the continuously allowable contact voltage value U agreed upon for the respective system is not exceeded
This is achieved by means of:
• Contact voltage measurement, 10 measurements with full­waves and extrapolation of I
N
• Substantiation of tripping within 400 ms or 200 ms with IN
• Substantiation of tripping with current rising residual current: This value must be between 50% and 100% of I about 70%).
N
L
(usually
Important Notes
•The PROFITEST MASTER allows for simple measurements at all types of RCDs. Select RCD, SRCD, PRCD etc.
• Measurement must be executed at one point only per RCD (RCCB) within the connected electrical circuits. Low-resis­tance continuity must be substantiated for the protective con­ductor at all other connections within the electrical circuit (R or U
).
B
• The measuring instruments often display a contact voltage of
0.1 V in TN systems due to low protective conductor resis­tance.
• Be aware of any bias currents within the system. These may cause tripping of the RCDs during measurement of contact voltage U ments with rising current: Display = I
, or may result in erroneous displays for measure-
B
- I
F
bias_current
• Selective RCDs identified with an can be used as the sole means of protection for automatic shutdown if they adhere to the same shutdown conditions as non-selective RCDs (i.e. t
< 400 ms). This can be substantiated by measuring shut-
a
down time.
• Type B RCDs may not be connected in series with type A RCDs.
Bias Magnetization Only AC measurements can be performed with the 2­pole adapter. Suppression of RCD tripping by means of bias magnetization with direct current is only possible via a country-specific plug insert, e.g. SCHUKO, or the 3­pole adapter.
LO
• No premature tripping with the test instrument, because test­ing is begun with 30% residual current (if no bias current occurs within the system).
RCD/FI Table Type of Differential
Current
Suddenly occurring
Alternating current
Slowly rising
Suddenly occurring
Pulsating di­rect current
Slowly rising
Direct current
Direct current up to 6 mA
* PROFITEST MTECH+, PROFITEST MXTRA & SECULIFE IP
Correct RCD/RCCB Function
Typ e AC
Typ e A, F
Typ e B*/
B+*
Typ e
EV*/MI*
✔✔✔✔
✔✔✔
✔✔
✔
Measurement With or Without Probe
Measurements can be performed with or without a probe. Measurements with probe require that the probe and reference
earth are of like potential. This means that the probe must be positioned outside of the potential gradient area of the earth elec­trode (R
The distance between the earth electrode and the probe should be at least 20 m.
The probe is connected with a 4 mm contact protected plug. In most cases this measurement is performed without probe.
Testing for the absence of voltage at the probe can be performed with the U
) in the RCD safety circuit.
E
The probe is part of the measuring circuit and may carry a current of up to 3.5 mA in accordance with VDE 0413.
function (see also section 6.1 on page 17).
PROBE
GMC-I Messtechnik GmbH 19
7.1 Measuring Contact Voltage (with reference to nominal
Attention!
!
Note
I
N
Nominal residual
Type 1: RCD, SRCD, PRCD etc.
Nominal current: 6 ... 125 A
Type 2: AC , A/F , B/B+ *
EV/MI
* Type B/B+/EV/MI = AC/DC sensitive
current:
10 ... 500 mA
Phase displacement: 0°/180°
X times tripping current:
Negative/positive half-wave
Negative/positive direct current
1, 2, 5 (I
N
max. 300 mA)
Waveform:
Connection:
without/with probe
System type:
TN/TT, IT
Contact voltage:
Time to trip:
< 25 V, < 50 V, < 65 V
residual current) with
1
/3 Nominal Residual Current and
Tripping Test with Nominal Residual Current
Select Measuring Function
Connection
1) Measuring Contact Current Without Tripping the RCD Measuring Method
The instrument uses a measuring current of only 1/3 nominal residual current for the determination of contact voltage U which occurs at nominal residual current. This prevents tripping of the RCCB.
This measuring method is especially advantageous, because contact voltage can be measured quickly and easily at any electri­cal outlet without tripping the RCCB.
The usual, complex measuring method involving testing for the proper functioning of the RCD at a given point, and subsequent substantiation that all other systems components requiring pro­tection are reliably connected at low resistance values to the selected measuring point via the PE conductor, is made unneces­sary.
IN
N-PE Reversal Test
Additional testing is conducted in order to determine whether or not N and PE are reversed. The pop-up window shown at the right appears in the event of reversal.
Set Parameters for I
N
Execute a data backup before starting measurement and switch off all consumers in order to prevent the loss of data in data processing systems.
Start Measurement
Amongst other values, contact voltage U ing resistance R
The measured earthing resistance value RE is acquired with very little current. More accurate results can be obtained with the selector switch in the R The DC + function can be selected here for sys­tems with RCCBs.
appear at the display panel.
E
and calculated earth-
IN
position.
E
Unintentional Tripping of the RCD due to Bias Current within the System
If bias currents should occur, they can be measured with the help of a current clamp transformer as described in section 13.1 on page 53. The RCCB may be tripped during the contact voltage test if extremely large bias currents are present within the system, or if a test current was selected which is too great for the RCCB.
After contact voltage has been measured, testing can be per­formed to determine whether or not the RCCB is tripped within the selected time limits at nominal residual current.
Unintentional Tripping of the RCD due to Leakage Current in the Measur­ing Circuit
20 GMC-I Messtechnik GmbH
Measurement of contact voltage with 30% nominal residual cur­rent does not normally trip an RCCB. However, the trip limit may be exceeded as a result of leakage current in the measuring cir­cuit, e.g. due to interconnected power consumers with EMC cir­cuit, e.g. frequency converters and PCs.
2) Tripping Test after the Measurement of Contact Voltage
Note
Attention!
!
I
F
Nominal residual current:
Type 1: RCD, SRCD, PRCD etc.
Nominal current: 6 ... 125 A
Type 2: AC , A/F , B/B+ *
EV/MI
* Type B/B+/EV/MI = AC/DC sensitive
10 ... 500 mA
sine
Negative/positive half-wave
Waveform:
Connection:
without/with probe
System type:
TN/TT, IT
Negative/positive direct current
➭ Press the
The tripping test need only be performed at one measuring point for each RCCB.
If the RCCB is tripped at nominal residual current,
the MAINS/NETZ LED blinks red (line voltage disconnected) and time to trip ta and earthing resistance RE appear at the display panel.
If the RCCB is not tripped at nominal residual current,
the RCD/FI LED lights up red.
I
key.
N
Contact Voltage Too High
If contact voltage U nal residual current I the U
If the limit value of the contact voltage U during the measuring sequence, a safety shut-down occurs for Germany (65 V apply for Austria per ÖVE/ÖNORM E 8001-1 standard, see section 5.3).
LED lights up red.
L/RL
, which has been measured with 1/3 nomi-
IN
and extrapolated to IN, is > 50 V (> 25 V),
N
exceeds 50 V (25 V)
IN

7.2 Special Testing for Systems and RCCBs

7.2.1 Testing Systems and RCCBs with Rising Residual Current (AC) for Type AC, A/F, B/B+ and EV/MI RCDs

Measuring Method
The instrument generates a continuously rising residual current of (0.3 to 1.3)  I The instrument stores the contact voltage and tripping current values which were measured at the moment tripping of the RCCB occurred, and displays them.
One of contact voltage limit values, U can be selected for measurement with rising residual current.
within the system for the testing of RCDs.
N
=25V or UL= 50 V/65 V,
L
Select Measuring Function
Connection
Safety Shut-down: At up to 70 V, a safety shut-down is
tripped within 3 seconds in accordance with IEC 61010.
Contact voltages of up to 70 V are displayed. If contact voltage is greater than 70 V, U
Limit Values for Allowable, Continuous Contact Voltage
The limit for allowable, continuous contact voltage is UL=50V for alternating voltages (international agreement). Lower values have been established for special applications (e.g. medical applica­tions: U
=25V).
L
If contact voltage is too high, or if the RCCB is not tripped, the system must be repaired (e.g. earthing resis­tance is too high, defective RCCB etc.)!
3-Phase Connections
For proper RCD testing at three-phase connections, the tripping test must be conducted for one of the three phase conductors (L1, L2 and L3).
Inductive Power Consumers
Voltage peaks may occur within the measuring circuit if inductive consumers are shut down during an RCCB trip test. If this is the case, the test instrument may display the following message: No measured value (– – – ). If this message appears, switch all power consumers off before performing the trip test. In extreme cases, one of the fuses in the test instrument may blow, and/or the test instrument may be damaged.
GMC-I Messtechnik GmbH 21
> 70 V is displayed.
IN
Set Parameters for I
F
Start Measurement
Note
Attention!
!
Note
Note
Contact voltage:
Tripping limit values:
S
I
N
Negative direct current
Positive direct current
Waveform:
180°: Start with neg. half-wave
0°: Start with pos. half-wave
5 times tripping current
X times tripping current:
7.2.3 Testing RCCBS with 5 IN
The measurement of time to trip is performed here with 5 times nominal residual current.
Measurements performed with 5 times nominal fault cur­rent are required for testing type and G RCCBs in the manufacturing process. They are used for personal safety as well.
Measurement can be started with the positive half-wave at “0°” or with the negative half-wave at “180°”.
Both measurements must nevertheless be performed. The longer of the two tripping times is decisive regarding the condition of the tested RCCB. Both values must be less than 40 ms.
Select Measuring Function
Set the Parameter – Start with Positive or Negative Half-Wave
Measuring Sequence
After the measuring sequence has been started, the test current generated by the instrument is continuously increased starting at
0.3 times nominal residual current, until the RCCB is tripped. This can be observed by viewing gradual filling of the triangle at I.
If contact voltage reaches the selected limit value (U or 25 V) before the RCCB is tripped, safety shut-down occurs. The UL/RL LED lights up red.
Safety Shut-down: At up to 70 V, a safety shut-down is tripped within 3 seconds in accordance with IEC 61010.
If the RCCB is not tripped before the rising current reaches nomi­nal residual current IN, the RCD/FI LED lights up red.
If bias current is present within the system during mea­surement, it is superimposed onto the residual current which is generated by the instrument and influences measured values for contact voltage and tripping cur­rent. See also section 7.1.
=65V, 50V
L
Evaluation
According to DIN VDE 0100, Part 600, rising residual current must, however, be used for measurements in the evaluation of RCDs, and contact voltage at nominal residual current IN must be calculated from the measured values. The faster, more simple measuring method should thus be taken advantage of (see sectionl 7.1).
Set the Parameter – 5 Times Nominal Current
The following restrictions apply to the selection of tripping current multiples relative to nominal current: 500 mA: 1 x, 2 x IN
Start Measurement

7.2.2 Testing Systems and RCCBs with Rising Residual Current (AC) for Type B/B+ and EV/MI RCDs (only MTECH+, MXTRA & SECULIFE IP)

In accordance with VDE 0413, part 6, it must be substantiated that, with smooth direct current, residual operating current is no more than twice the value of rated residual current I ously rising direct current, beginning with 0.2 times rated residual current IN, must be applied to this end. If current rise is linear, ris­ing current may not exceed twice the value of I of 5 seconds.
Testing with smoothed direct current must be possible in both test current directions.
22 GMC-I Messtechnik GmbH
. A continu-
N
within a period
N
7.2.4 Testing of RCCBs which are Suited for
Note
Note
Note
I
N
Neg. half-wave
Pos. half-wave
Negative direct current
Positive direct current
Waveform:
X times tripping current:
50% IN*
* Non-tripping test
with 50% I
N
S
I
N
I
F
or
Type 1:
Pulsating DC Residual Current
In this case, RCCBs can be tested with either positive or negative half-waves. The standard calls for tripping at 1.4 times nominal current.
Select Measuring Function
Set the Parameter – Positive or Negative Half-Wave

7.3 Testing for Special RCDs

7.3.1 System, Type RCD-S Selective RCCBs

Selective RCDs are used in systems which include two series connected RCCBs which are not tripped simultaneously in the event of a fault. These selective RCDs demonstrate delayed response characteristics and are identified with the symbol.
Measuring Method
The same measuring method is used as for standard RCCBs (see sections 7.1 on page 20 and 7.2.1 on page 21).
If selective RCDs are used, earthing resistance may not exceed half of the value for standard RCCBs.
For this reason, the instrument displays twice the measured value for contact voltage.
Select Measuring Function
Set Parameter – Selective
Set the Parameter – Test With and Without “Non-Tripping Test”
Non-Tripping Test
If, during the non-tripping test which lasts for 1 second, the RCD trips too early at 50% I before the actual tripping test starts, the pop-up window shown at the right appears.
The following restrictions apply to the selection of tripping current multiples relative to nominal current: 500 mA: Double and five-fold nominal current are not possible in this case.
N
, i.e.
Start Measurement
According to DIN EN 50178 (VDE 160), only type B RCCBs (AC-DC sensitive) can be used for equipment with > 4 kVA, which is capable of generating smooth DC residual current (e.g. frequency converters). Tests with pulsating DC fault current only are not suitable for these RCCBs. Testing must also be conducted with smooth DC residual current in this case.
Measurement is performed with positive and negative half-waves for testing RCCBs during manufacturing. If a circuit is charged with pulsating direct current, the func­tion of the RCCB can be executed with this test in order to assure that the RCCB is not saturated by the pulsating direct current so that it no longer trips.
GMC-I Messtechnik GmbH 23
Tripping Test
Note
I
N
I
F
or
Type 1:
➭ Press the IN key. The RCCB is tripped. Blinking bars appear
at the display panel, after which time to trip t sistance R
The tripping test need only be performed at one measuring point for each RCCB.
are displayed.
E
Selective RCDs demonstrate delayed response charac­teristics. Tripping performance is briefly influenced (up to 30 s) due to pre-loading during measurement of contact voltage. In order to eliminate pre-charging caused by the measurement of contact voltage, a waiting period must be observed prior to the tripping test. After the measuring sequence has been started (tripping test), blinking bars are displayed for approximately 30 seconds. Tripping times of up to 1000 ms are allowable. The tripping test is executed immediately after once again pressing the I key.
and earthing re-
A
N
Measuring Method
The following can be measured, depending upon the measuring method:
•Time to trip t (The PRCD-K must be tripped at 50% nominal current.)
• Tripping current I: testing with rising residual current I
: tripping test with nominal residual current I
A
Select Measuring Function
Connection
Set the Parameter – PRCD with Non-Linear Elements
N
F

7.3.2 PRCDs with Non-Linear Type PRCD-K Elements

The PRCD-K is a portable RCD with electronic residual current evaluation laid out as an in-line device which switches all poles (L, N and PE). An undervoltage trigger and protective conductor monitoring are additionally integrated into the PRCD-K.
The PRCD-K is equipped with an undervoltage trigger, for which reason it has to be operated with line voltage, and measurements may only be performed in the on state (PRCD-K switches all poles).
Terminology (from DIN VDE 0661)
Portable protective devices are circuit breakers which can be con­nected between power consuming devices and permanently installed electrical outlets by means of standardized plug-and­socket devices. A reusable, portable protective device is a protective device which is designed such that it can be connected to movable cables.
Please be aware that a non-linear element is usually integrated into PRCDs, which leads to immediate exceeding of the greatest allowable contact voltage during U than 50 V).
PRCDs which do not include a non-linear element in the protec­tive conductor must be tested in accordance with section 7.3.3 on page 25.
measurements (UI greater
I
Objective (from DIN VDE 0661)
Portable residual current devices (PRCDs) serve to protect per­sons and property. They allow for the attainment of increased lev­els of protection as provided by protective measures utilized in electrical systems for the prevention of electrical shock as defined in DIN VDE 0100, part 410. They are to be designed such that they can be installed by means of a plug attached directly to the protective device, or by means of a plug with a short cable.
Start Measurement
24 GMC-I Messtechnik GmbH

7.3.3 SRCD, PRCD-S (SCHUKOMAT, SIDOS or comparable)

Note
I
N
I
F
or
Type 1:
I
N
Type 1:
180°: Start with neg. half-wave
0°: Start with pos. half-wave
Waveform:
Negative direct current
Positive direct current
RCCBs from the SCHUKOMAT SIDOS series, as well as others which are of identical electrical design, must be tested after selecting the corresponding parameter.
Monitoring of the PE conductor is performed for RCDs of this type. The PE conductor is monitored by the summation current transformer. If residual current flows from L to PE, tripping current is cut in half, i.e. the RCCB must be tripped at 50% nominal resid­ual current I
Whether or not PRCDs and selective RCDs are of like design can be tested by measuring contact voltage U
of greater than 70 V is measured at the PRCD of an other-
U
IN
wise error-free system, the PRCD more than likely contains a non­linear element.
N
.
. If a contact voltage
IN

7.3.4 Type G or R RCCB

In addition to standard RCCBs and selective RCDs, the special characteristics of the type G RCCB can also be tested with the test instrument.
The type G RCCB is an Austrian specialty and complies with the ÖVE/ÖNORM E 8601 device standard. Erroneous tripping is min­imized thanks to its greater current carrying capacity and short­term delay.
Select Measuring Function
PRCD-S
The PRCD-S (portable residual current device – safety) is a spe­cial, portable, protective device with protective conductor detec­tion or protective conductor monitoring. The device serves to pro­tect persons from electrical accidents in the low-voltage range (130 to 1000 V). The PRCD-S must be suitable for commercial use, and is installed like an extension cable between an electrical consumer – as a rule an electrical tool – and the electrical outlet.
Select Measuring Function
Set Parameter – SRCD / PRCD
Set Parameter – Type G/R (VSK)
Contact voltage and time to trip can be measured in the G/R­RCD switch position.
It must be observed that time to trip for type G RCCBs may be as long as 1000 ms when measurement is made at nominal residual current. Set the limit value corre­spondingly.
➭ Then select 5 x I
for the G/R setting) and repeat the tripping test beginning with the positive half-wave at 0° and the negative half-wave at 180°. The longer of the two tripping times is decisive regard­ing the condition of the tested RCCB.
in the menu (this is selected automatically
N
Start Measurement
GMC-I Messtechnik GmbH 25
Set the Parameter – Start with Positive or Negative Half-Wave
Set the Parameter – 5 Times Nominal Current
Note
Note
5 times tripping current
S
UINR
E
IN 1 30 mA 30mV 0
· 03V,== ==
The following restrictions apply to the selection of tripping current multiples relative to nominal current: 500 mA: 1 x, 2 x IN
Start Measurement

7.4 Testing Residual Current Circuit Breakers in TN-S Systems Connection

RCCBs can only be used in TN-S systems. An RCCB would not work in a TN-C system because PE is directly connected to the neutral conductor in the outlet (it does not bypass the RCCB). This means that residual current would be returned via the RCCB and would not generate any differential current, which is required in order to trip the RCCB.
As a rule, the display for contact voltage is also 0.1 V, because the nominal residual current of 30 mA together with minimal loop resistance results in a very small voltage value:
In both cases, tripping time must be between 10 ms (minimum delay time for type G RCCBs!) and 40 ms.
Type G RCCBs with other nominal residual current values must be tested with the corresponding parameter setting under menu item I adjusted.
. In this case as well, the limit value must be appropriately
N
The RCD parameter setting for selective RCCBs is not suitable for type G RCCBs.
26 GMC-I Messtechnik GmbH
7.5 Testing of RCD Protection in IT Systems with High Cable
Note
System
type:
I
N
I
F
or
Times to trip 6 mA
60 mA 200 mA
10.0 s
0.3 s
0.1 s
Capacitance (e.g. in Norway)
The desired system type (TN/TT oder IT) can be selected for RCD test type U
A probe is absolutely essential for measurement in IT systems, because contact voltage U cannot otherwise be measured.
After selecting the IT system setting, connection with probe is selected automatically.
(IN, ta), and for earthing measurement (RE).
IN
which occurs in these systems
IN
Set the Parameter – Select System Type
Start Measurement

7.6 Testing of 6 mA Residual Current Devices RDCDD / RCMB

DIN VDE 0100-722 (Installation Specifications for Charging Sta­tions for Electric Vehicles) stipulates that each socket for the charging of an electric vehicle must be protected by a separate residual current device (RCD). Furthermore, an additional protection is required for multiphase charging of smooth direct residual current. Protection may either be provided by a type B RCD, an RDC-DD (Residual Direct Cur­rent – Detecting Device) or an RCMB (Residual Current Monitor­ing Module).
Select Measuring Function
Set the Parameter – Type RDC
Set the Parameter – Time to trip
The RCD-DD is tested with nominal residual currents of 6 to 200 mA.
Start Measurement
GMC-I Messtechnik GmbH 27
Set the Parameter – Type RCMB
Note
300 mA 6 mA 60 mA
0.04 s
10.0 s
0.3 s
Times to trip
Z
L-PE
Set the Parameter – Time to trip
The RCMB is tested with nominal residual currents of 6 to 300 mA.
Start Measurement
8 Testing of Breaking Requirements
Overcurrent Protective Devices, Measurement of Loop Impedance and Determination of Short-Circuit Current (functions Z
Testing of overcurrent protective devices includes visual inspec­tion and measurement. Use the PROFITEST MASTER or SECULIFE IP to perform measurements.
Measuring Method
Loop impedance Z ascertained in order to determine if the breaking requirements for protective devices have been fulfilled.
Loop impedance is the resistance within the current loop (utility station – phase conductor – protective conductor) when a short­circuit to an exposed conductive part occurs (conductive connec­tion between phase conductor and protective conductor). Short­circuit current magnitude is determined by the loop impedance value. Short-circuit current I value set forth by DIN VDE 0100, so that reliable breaking of the protective device (fuse, automatic circuit breaker) is assured.
Thus the measured loop impedance value must be less than the maximum allowable value.
Tables containing allowable display values for loop impedance and minimum short-circuit current display values for ampere rat­ings for various fuses and circuit breakers can be found in the help texts and in section 21 beginning of page 92. Maximum device error in accordance with VDE 0413 has been taken into consideration in these tables. See also section 8.2.
In order to measure loop impedance Z test current of 3.7 to 7 A (60 to 550 V) depending on line voltage and line frequency. At 16 Hz, the test has a duration of no more than 1200 ms.
If the limit value of the contact voltage exceeds 50 V during this measurement, a safety shut-down occurs for Germany (65 V apply for Austria per ÖVE/ÖNORM E 8001-1 standard, see section
5.3). The shut-down value can be set between 25 V and 65 V, see for example section 5.7.
The test instrument calculates short-circuit current IK based on measured loop impedance current calculation is made with reference to nominal line voltage for line voltages which lie within the nominal ranges for 120 V, 230 V and 400 V systems. If line voltage does not lie within these nominal ranges, the instrument calculates short-circuit current I based on prevailing line voltage and measured loop impedance Z
.
L-P E
Select Measuring Function
and IK)
L-PE
is measured and short-circuit current IK is
L-P E
may not fall below a predetermined
K
, the instrument uses a
L-P E
Z
and line voltage. Short-circuit
L-P E
K
Connection: Schuko / 3-Pole Adapter
28 GMC-I Messtechnik GmbH
Connection:
Note
Note
Note
Note
Start
t1 t3
Measurement
t2
Operation
RCD Disabled!
t
I
F
/mA
Suppression of RCCB tripping for RCCBs which are sensitive to pulsating current
Z
L-PE
Tripping characteristics:
Diameter*: 1.5 to 70 sq. mm
Cable types*: NY...- H07...
Number of wires*: 2 to 10-strand
Nominal current:
2 ... 160 A, 9999 A
A, B/L, C/G, D, E, H, K, GL/GG & Factor
Sine
15 mA sinusoidal
Waveform:
DC-L offset and positive half-wave
Contact voltage:
DC-H offset and positive half-wave
2-pole
Measurement with country-specific
plug insert (e.g. Schuko)
Note
Selecting test probe and Lx-PE reference or AUTO is only relevant for report generation.
Semiautomatic measurement
See also section 5.8 regarding the
AUTO parameter.
Polarity selection
measurement
2-Pole Adapter

8.1.1 Measurement with Positive Half-Waves (only MTECH+/MXTRA/SECULIFE IP)

Measurement by means of half-waves plus direct current makes it possible to measure loop impedance in systems which are equipped with RCCBs.
For DC measurement with half-waves you can choose between two alternatives:
DC-L: lower premagnetization current allowing for faster mea-
surement
DC-H: higher premagnetization current, therefore higher protec-
tion against tripping of RCD
Select Measuring Function
Loop impedance should be measured for each electrical circuit at the farthest point, in order to ascertain maxi­mum loop impedance for the system.
Observe national regulations, e.g. the necessity of conduct­ing measurements without regard for RCCBs in Austria.
3-Phase Connections
Measurement of loop impedance to earth must be performed at all three phase conductors (L1, L2, and L3) for the testing of over­current protective devices at three phase outlets.

8.1 Measurements with Suppression of RCD Tripping Measuring Method with Suppression of RCD Tripping

The test instruments PROFITEST MTECH+, PROFITEST MXTRA and SECULIFE IP make it possible to measure loop impedance in TN
systems with type A, F 300, 500 mA nominal residual current).
The test instrument generates a direct current to this end, which saturates the RCCB’s magnetic circuit. The test instrument then superimposes a measuring cur­rent which only demonstrates half­waves of like polar­ity. The RCCB is no longer capable of detecting this mea­suring current, and is consequently not tripped during measurement.
A four conductor measuring cable is used between the instru­ment and the test plug. Cable and measuring adapter resistance is automatically compensated for during measurement and does not effect measurement results.
Set Parameters
* Parameters used for report generation only which do not influence the measurement
and type AC RCCBs (10, 30, 100,
Sine (full wave) Setting for electric circuits without RCD 15 mA sinusoidal Setting only for motor protection switch
with low nominal current
DC+half-wave Setting for electric circuits with RCD
A loop impedance measurement by using the method of suppression of RCD tripping can only be performed with
GMC-I Messtechnik GmbH 29
type A and F RCDs.
Bias Magnetization Only AC measurements can be performed with the 2­pole adapter. Suppression of RCD tripping by means of bias magnetization with direct current is only possible via a country-specific plug insert, e.g. SCHUKO, or the 3­pole adapter (neutral conductor necessary).
Start Measurement
Limit value:
I
K
< limit value
UL R
L
Semiautomatic Measurement

8.2 Evaluation of Measured Values

The maximum allowable loop impedance Z which may be displayed
L-P E
after allowance has been made for maxi­mum operating mea­surement error (under normal measuring con­ditions) can be deter­mined with the help of Table 1 on page 92. Intermediate values can be interpolated.
The maximum allowable nominal current for the protective device (fuse or circuit breaker) for a line voltage of 230 V after allowance has been made for maximum measuring error can be determined with the help of Table 6 on page 93 based upon measured short-cir­cuit current (corresponds to DIN VDE 0100 Part 600).
Special Case: Suppressing Display of the Limit Value
The limit value cannot be ascertained. The inspec­tor is prompted to evalu­ate the measured val­ues himself, and to acknowledge or reject them with the help of the softkeys.
Measurement passed: key
✔
Measurement failed: X key
The measured value can only be saved after it has been evaluated.
8.3 Settings for Short-circuit current Calculation – Parameter I
K
Short-circuit current IK is used to test shutdown by means of an overcurrent protective device. In order for an overcurrent protec­tive device to be tripped on time, short-circuit current IK must be greater than tripping current Ia (see table 6 in section 21.1). The variants which can be selected with the “Limits” key have the fol­lowing meanings:
I
: Ia The measured value displayed for IK is used without
K
I
: Ia+% The measured value displayed for Z
K
any correction to calculate Z
by an amount equal to the test instrument’s measuring
L-PE
.
L-P E
is corrected
uncertainty in order to calculate IK.
I
: 2/3 Z In order to calculate IK, the measured value displayed
K
I
: 3/4 Z Z
K
for Z all possible deviations (these are defined in detail by VDE 0100, part 600, as Z
is corrected by an amount corresponding to
L-P E
2/3 x U0/Ia).
3/4 x U0/Ia
s(m)
s(m)
Z Loop impedance
K
Short-circuit current
I U Voltage at the test probes, “UN” is displayed if voltage Umax.
deviates from nominal voltage by 10%
f Frequency of the applied voltage,
N” is displayed if frequency fmax. deviates from nominal fre-
“f quency by 1%
Ia Tripping current (see data sheet for circuit breakers / fuses)
%Test instrument inherent error
30 GMC-I Messtechnik GmbH
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