Manual
Table Of Contents
- 1 Safety Instructions
- 2 Applications
- 3 Documentation
- 4 Getting Started
- 5 The Instrument
- 6 Operating and Display Elements
- 7 Operation
- 8 Instrument Settings
- 9 Database
- 10 General Information on Measurements
- 10.1 Using Cable Sets and Test Probes
- 10.2 Test Plug – Changing Inserts
- 10.3 Connecting the Instrument
- 10.4 Automatic Settings, Monitoring and Shutdown
- 10.5 Measured Value Display and Memory
- 10.6 Help Function
- 10.7 Setting Parameters or Limit Values using RCD Measurement as an Example
- 10.8 Freely Selectable Parameter Settings or Limit Values
- 10.9 2-Pole Measurement with Rapid or Semiautomatic Polarity Reversal
- 11 Measuring Voltage and Frequency
- 12 Testing RCDs
- 12.1 Measuring Touch Voltage (with reference to nominal residual current) with ⅓ Nominal Residual Current and Tripping Test with Nominal Residual Current
- 12.2 Special Tests for Systems and RCDs
- 12.2.1 Testing Systems and RCCBs with Rising Residual Current (AC) for Type AC, A/F, B/B+ and EV/MI RCDs (PROFITEST MTECH+, PROFITEST MXTRA only)
- 12.2.2 Testing Systems and RCCBs with Rising Residual Current (AC) for Type B/B+ and EV/MI RCDs (PROFITEST MTECH+PROFITEST MXTRA)
- 12.2.3 Testing RCCBS with 5 × IDN
- 12.2.4 Testing of RCCBs which are Suitable for Pulsating DC Residual Current
- 12.3 Testing of Special RCDs
- 12.4 Testing Residual Current Circuit Breakers in TN-S Systems
- 12.5 Testing of RCD Protection in IT Systems with High Cable Capacitance (e.g. In Norway)
- 12.6 Testing of 6 mA Residual Current Devices RDC-DD/RCMB (RDC-DD: PROFITEST MXTRA and PROFITEST MTECH+ only)
- 13 Testing of Breaking Requirements for Overcurrent Protective Devices, Measurement of Loop Impedance and Determination of Short-Circuit Current (ZL-PE and ISC Functions)
- 14 Measuring Supply Impedance (ZL-N Function)
- 15 Earthing Resistance Measurement (Function RE)
- 15.1 Earthing Resistance Measurement – Mains Powered
- 15.2 Earthing Resistance Measurement – Battery Powered, “Battery Mode” (PROFITEST MPRO & PROFITEST MXTRA only)
- 15.3 Earthing Resistance, Mains Powered – 2-Pole Measurement with 2-Pole Adapter or Country-Specific Plug (Schuko) without Probe
- 15.4 Earthing Resistance Measurement. Mains Powered – 3-Pole Measurement: 2-Pole Adapter with Probe
- 15.5 Earthing Resistance Measurement, Mains Powered – Measuring Earth Electrode Potential (UE Function)
- 15.6 Earthing Resistance Measurement, Mains Powered – Selective Earthing Resistance Measurement with Current Clamp Sensor as Accessory
- 15.7 Earthing Resistance Measurement, Battery Powered, “Battery Mode” – 3-Pole (PROFITEST MPRO & PROFITEST MXTRA only)
- 15.8 Earthing Resistance Measurement, Battery Powered, “Battery Mode” – 4-Pole (PROFITEST MPRO & PROFITEST MXTRA only)
- 15.9 Earthing Resistance Measurement, Battery Powered, “Battery Mode” – Selective (4-pole) with Current Clamp Sensor and PRO-RE Measuring Adapter as Accessory (PROFITEST MPRO & PROFITEST MXTRA only)
- 15.10 Earthing Resistance Measurement, Battery Powered, “Battery Mode” – Ground Loop Measurement (with current clamp sensor and transformer, and pro-re measuring adapter as accessory) (PROFITEST MPRO & PROFITEST MXTRA only)
- 15.11 Earthing Resistance Measurement, Battery Powered, “Battery Mode” – Measurement of Soil Resistivity rE (PROFITEST MPRO & PROFITEST MXTRA only)
- 16 Measurement of Insulation Resistance
- 17 Measuring Low-Value Resistance of up to 200 W (Protective Conductor and Equipotential Bonding Conductor)
- 18 Measurement with Accessory Sensors
- 19 Special Functions – EXTRA Switch Position
- 19.1 Voltage Drop Measurement (at ZLN) – DU Function
- 19.2 Measuring the Impedance of Insulating Floors and Walls (standing surface insulation impedance) – ZST Function
- 19.3 Testing Meter Startup with Earthing Contact Plug – kWh Function
- 19.4 Leakage Current Measurement with PRO-AB Leakage Current Adapter as Accessory – IL Function (PROFITEST MXTRA only)
- 19.5 Testing Insulation Monitoring Devices – IMD Function (PROFITEST MXTRA only)
- 19.6 Residual Voltage Test – Ures Function (PROFITEST MXTRA only)
- 19.7 Intelligent Ramp – ta+ID Function (PROFITEST MXTRA only)
- 19.8 Testing Residual Current Monitors – RCM Function ( PROFITEST MXTRA only)
- 19.9 Checking the Operating Statuses of Electric Vehicles at Charging Stations per IEC 61851 ((PROFITEST MTECH+ & PROFITEST MXTRA)
- 19.10 PRCD – Test Sequences for Documenting Fault Simulations at PRCDs with the PROFITEST PRCD Adapter (PROFITEST MXTRA only)
- 20 Test Sequences (Automatic Test Sequences) – AUTO Function
- 21 Maintenance
- 22 Contact, Support and Service
- 23 CE Declaration
- 24 Disposal and Environmental Protection
- 25 Appendix
- 25.1 Tables for Determining Maximum and Minimum Display Values in Consideration of the Instrument’s Maximum Measuring and Intrinsic Uncertainties
- 25.2 At which values should/must an RCD actually be tripped? Requirements for Residual Current Devices (RCD)
- 25.3 Testing Electrical Machines per DIN EN 60 204 – Applications, Limit Values
- 25.4 Periodic Testing per DGUV V 3 (previously BGV A3) – Limit Values for Electrical Systems and Operating Equipment
- 25.5 Bibliography
- 25.6 Internet Addresses for Additional Information
86 Gossen Metrawatt GmbH
19.5
Testing Insulation Monitoring Devices – IMD Function
(PROFITEST MXTRA only)
Application
Insulation monitoring devices (IMDs) or earth fault detection sys-
tems (EDSs) are used in IT systems in order to monitor adherence
to a minimum insulation resistance value as specified by
DIN VDE 0100-410.
They’re used in power supplies for which a single-pole earth fault
may not result in failure of the power supply, for example in oper-
ating rooms or photovoltaic systems.
Insulation monitors can be tested with the help of this special
function. After pressing the ON/START ▼ key, an adjustable insula-
tion resistance is activated between one of the two phases of the
IT system to be monitored and ground to this end. This resistance
can be changed in the MAN± manual sequence mode with the
help of the + or – softkey, or varied automatically from R
max
to
R
min
in the AUTO operating mode. Testing is ended by once again
pressing the ON/START ▼ key.
Time during which the momentary resistance value prevails since
changing the value at the system is displayed. The IMD’s display
and response characteristics can be subsequently evaluated and
documented with the help of the OK or NOT OK softkey.
Connection L – N
When selecting test resistance, don’t forget that an excessively
high test current could damage sensitive system components.
Set Parameters
Measuring Procedure (1)
There are two ways to conduct the test:
– MAN: Resistance is changed manually by tapping the respec-
tive softkeys.
– AUTO: Resistance is changed automatically every 2 seconds
beginning with R
START.
Resistance RSTART (3)
Numerous parameters are available for setting resistance RSTART,
with which measurement is begun.
Conductor Relationship / Resistance Range (2)
– Conductor relationship: The corresponding conductor relation-
ship can be selected for documentation of the measuring
point.
– Resistance range: A range of values can be selected for testing
the display of resistance at the IMD.
The parameter is set as a percentage with reference to the resis-
tance momentarily introduced by the test instrument.
Upper and lower limit values are displayed in the measuring view.
Measuring Procedure
➭ Set the parameters.
➭ Start: Press the ON/START ▼ key.
➭ A resistance is introduced between the phase and protective
conductors and time measurement is started.
➭ Manual test MAN + –: press the or key to increase
or reduce test resistance R
L-PE.
➭ Automatic test AUTO: the resistance value is changed automati-
cally.
➭ Time to trip ta is restarted each time resistance is changed.
➭ Press I
N
in order to change the conductor relationship.
➭ In order to end measurement, press the ON/START ▼ key as
soon as the IMD indicates that insulation resistance has been
fallen short of.
➭ Display of measured values
➭ Evaluation query: Measurement OK?
➭ If evaluation is NOT OK: the UL/RL LED lights up red.
➭ Save: by pressing the soft key.
1
3
2
Conductor
Relationship: