Description
Short-circuit loop measurement:
- impedance measurement with 23 A current (44 A phase-to-phase) – short-circuit resistor R=10,
- measurement range: 95…440 V, frequency 45…65 Hz,
Short-circuit loop measurement with resolution 0,01, in distribution network without tiggering RCD (In30 mA):
- automatic calculation of short-circuit, detection of phase voltage and phase-to-phase voltage,
- additional UNI-Schuko plug for automatic measurement, AGT adapter for 3 phase network measurement.
Testing of general and selective RCD with the rated differential current of 10,30,100,300,500 and 1000 mA. (Type AC, A and B).
Measurement of insulation resistance:
- with test voltage 250 V, 500 V, 1000 V, 2500 V,
- measurement range up to 10G,
- automatic discharging after measurement,
- automatic measurement of all resistences in 3,4,5-wire cables using optional adapter AUTO-ISO,
- acoustic signals in 5 sec intervals for insulation resistance characteristic,
- elapsing T1, T2, T3 times (0…600 s) form measurement of absorption coefficients (DAR, PI or Ab1, Ab2)
- safety measurement – protection against overvoltage.
Measurement of earthing resistance.
Bi-directional testing of PE wire continuity using 200 mA current.
- Autocalibration of test leads.
Phase sequence testing.
Memory is divided into 10 memory banks each of them containing 99 memory cells.
Battery charge indicator.
AUTO-OFF function.
USB interface.
MPI-525 is equipment to perform complete test and verify on electrical installations according to the most common safety standards (IEC 61557, VDE 0100, BS7671).
Possible measurements
- Short-circuit loop measurement:
-impedance measurement with 23 A current (44 A phase-to-phase) – short-circuit resistor R=10 Ω,
– measurement range: 95…440 V, frequency 45…65 Hz, - Short-circuit loop measurement with resolution 0,01 Ω, in distribution network without tiggering RCD (IΔn≥30 mA):
– automatic calculation of short-circuit, detection of phase voltage and phase-to-phase voltage,
– additional UNI-Schuko plug for automatic measurement, AGT adapter for 3 phase network measurement. - Testing of general and selective RCD with the rated differential current of 10,30,100,300,500 and 1000 mA. (Type AC, A and B).
- Measurement of insulation resistance:
– with test voltage 250 V, 500 V, 1000 V, 2500 V,
– measurement range up to 10 GΩ,
– automatic discharging after measurement,
– automatic measurement of all resistences in 3,4,5-wire cables using optional adapter AUTO-ISO,
– acoustic signals in 5 sec intervals for insulation resistance characteristic,
– elapsing T1, T2, T3 times (0…600 s) form measurement of absorption coefficients (DAR, PI or Ab1, Ab2)
– safety measurement – protection against overvoltage. - Measurement of earthing resistance.
- Bi-directional testing of PE wire continuity using 200 mA current.
– Autocalibration of test leads. - Phase sequence testing.
- Memory is divided into 10 memory banks each of them containing 99 memory cells.
- Battery charge indicator.
- AUTO-OFF function.
- USB interface.
Rated operational conditions:
– operation temperature 0…+50°C
Electric security:
– type of insulation: double, according to PN-EN 61010 – 1and IEC 61557, EMC
– measurement category: IV 300 V acc. to PN-EN 61010 – 1
– protection class acc. to PN-EN 60529: IP54
Short-circuit loop impedance measurement ZL-PE, ZL-N, ZL-L
Measurement using 23/40 A current measurement range in accordance with
IEC 61557: 0,13…1999,9 Ω
(for 1,2 m lead):
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(5% m.v + 3 dgt) |
20,0…199,9 Ω | 0,1 Ω | |
200…1999 Ω | 1 Ω |
rated voltage: 95…270 V (forZL-PE i ZL-N) and 95…440 V (for ZL-L)
frequency: 45…65 Hz
Short-circuit loop impedance measurement ZL-PE RCD
Measurement using 15 mA current measurement range in accordance with
IEC 61557: 0,50…1999,9 Ω
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(6% m.v. + 10 dgt) |
20,0…199,9 Ω | 0,1 Ω | ±(6% m.v + 5 dgt) |
200…1999 Ω | 1 Ω |
rated voltage: 95…270 V
frequency: 45…65 Hz
Measurement of earthing RE
Rated voltage in accordance with IEC 61557 – 5: 0,5…1999 Ω
Range | Resolution | Accuracy |
0,00…9,99 Ω | 0,01 Ω | ±(2% m.v. + 4 dgt) |
10,0…99,9 Ω | 0,1 Ω | ±(2% m.v. + 3 dgt) |
100…999 Ω | 1 Ω | |
1,00…1,99 kΩ | 0,01 kΩ |
Insulation resistance measurement
Measurement range in accordance with IEC 61557 – 2:
– for UN = 50 V: 50 kΩ…250 MΩ
– for UN = 100 V: 100 kΩ…500 MΩ
– for UN = 250 V: 250 kΩ…1 GΩ
– for UN = 500 V: 500 kΩ…2 GΩ
– for UN = 1000 V: 1 MΩ…3 GΩ
– for UN = 2500 V: 2,5 MΩ…9,99 GΩ
Range*) | Resolution | Accuracy |
0…1999 kΩ | 1 kΩ | ±(3% m.v. + 8 dgt) |
2,00…19,99 MΩ | 0,01 MΩ | |
20,0…199,9 MΩ | 0,1 MΩ | |
200…999 MΩ | 1 MΩ | |
1,00…3,00 GΩ | 0,01 GΩ | ±(4% m.v. + 6 dgt) |
1,00…9,99 GΩ | 0,1 GΩ |
*) limited to measurement range.
– with UNI-Schuko additional error ±2%.
Phase sequence
– phase sequence indicator: forward, reverse
– mains voltage range UL-L: 100…440 V (45…65 Hz) UL-L: 100…440 V (45…65 Hz)
– display of phase-to-phase voltages
Low voltage test of the circuit and insulation continuity
Test of PE wire continuity using a ±200 mA current
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(2% m.v. + 3 dgt) |
20,0…199,9 Ω | 0,1 Ω | |
200…400 Ω | 1 |
– Voltage on open terminals: 4…9 V
– Test current at R<2 Ω: min. 200 mA at rated battery voltage
– Autocalibration of test leads
– Measurements for both polarizations of the current
RCD trigger and response time test tA (for tA mode)
Measurement ranges in accordance with IEC 61557: 0 ms … up to the upper bound of the displayed value
Breaker Type |
Test Current Multiplier |
Measurement Range |
Resolution | Accuracy |
Standard | 0,5*IΔn | 0…300 ms | 1 ms | ± (2% m.v + 2 dgt)
|
1*IΔn | ||||
2*IΔn | 0…150 ms | |||
5*IΔn | 0…40 ms | |||
Selective | 0,5*IΔn | 0…500 ms | ||
1*IΔn | ||||
2*IΔn | 0…200 ms | |||
5*IΔn | 0…150 ms |
Precision of the differential current: for 0,5*IΔn:-8…0% dla 1*IΔn, 2*IΔn, 5*IΔn: 0…8%
Measurement of the RCD triggering current (IA) for sine waveform testing current
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 3,3…10,0 mA | 0,1 mA | 0,3xIΔ..1,0xIΔ | ± 5%IΔn |
30 mA | 9,0…30,0 mA | |||
100 mA | 33…100 mA | 1 mA | ||
300 mA | 90…300 mA | |||
500 mA | 150…500 mA | |||
1000 mA | 330…1000 mA | 1 mA |
It is possible to start the measurement from the positive or negative half of the forced leaking current
Measurement of the RDC triggering current (IA ) for a unidirectional half period sine
waveform test current with a 6 mA direct current offset
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 4…20,0 mA | 0,1 mA | 0,4xIΔn..2,0xIΔn | ±10%IΔn |
30 mA | 12,0…42,0 mA | 0,4xIΔn..1,4xIΔn | ||
100 mA | 40,0…140 mA | 1 mA | ||
300 mA | 120…420 mA | |||
500 mA | 200…700 mA |
a measurement is possible for a positive or negative forced leakage current
Measurement of the RCD triggering current (IA ) for direct testing current
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 4,0…20,0 mA | 0,1 mA | 0,4xIΔn..2,0xIΔn | ±10%IΔn |
30 mA | 12,0…60,0 mA | 1 mA | ||
100 mA | 40…200 mA | |||
300 mA | 120…600 mA | |||
500 mA | 200…1000 mA |
a measurement is possible for a positive or negative forced leakage current
„m.v.” measured value.
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