MPI-520 Multifunction Meter WMGBMPI520

$2,289.00 including GST


The MPI-520 multifunction meter is dedicated to perform diagnosis of electrical installation according to IEC 61557 standards. Digital meter MPI-520 is designed to measure impedance of a short cicuit loop also without triggering RCD, parameters of RCD, insulation resistance, earthing resistance, continuity and also for phase sequence testing. Furthermore to measure and logging of AC voltage and current, frequency and power.
Wide range of standard accessories enable to perform all necessary measurements and safety test. Highly professional portable multifunction meter with memory of measured parameters.

MPI-520 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,
  • measurement range up to 3 GΩ,
  • UNI-Schuko plug for insulation measurement,
  • 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,
  • 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 containing99 memory cells.

Battery charge indicator.

AUTO-OFF function.

USB interface.

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 Ω0,01 Ω±(5% m.v. + 3 dgt)
20,0…199,9 Ω0,1 Ω
200…1999 Ω1 Ω

rated voltage: 95…270 V (for ZL-PE i ZL-N) and 95…440 V (for ZL-L)
frequency: 45…65 Hz

Short-circuit loop impedance measurement ZL-PERCD
Measurement using 15 mA current measurement range in accordance with
IEC 61557: 0,50…1999,9 Ω

RangeResolution Accuracy
0,00…19,99 Ω0,01 Ω±(6% m.v. + 10 dgt)
20,0…199,9 Ω0,1 Ω±(6% m.v. + 5 dgt)
200…1999 Ω1 Ω

rated voltage: 95…270 V
frequency: 45…65 Hz

Measurement of earthing RE
Rated voltage in accordance with IEC 61557 – 5:

  • 0,5 Ω…1,99 kΩ for 50 V
  • 0,56 Ω…1,99 kΩ for 25 V
RangeResolution Accuracy
0,00…9,99 Ω0,01 Ω±(2% m.v. + 4 dgt)
10,0…99,9 Ω0,1 Ω±(2% m.v. + 3 dgt)
100…999 Ω1 Ω
1,00…1,99 kΩ0,01 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
Display range*)ResolutionAccuracy**)
0…1999 kΩ1 kΩ±(3% m.v. + 8 dgt)
2,00…19,99 MΩ0,01 MΩ
20,0…199,9 MΩ0,1 MΩ
200…999 MΩ1 MΩ
1,00…3,00 GΩ0,01 GΩ±(4% m.v. + 6 dgt)

*) 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 pase-to-phase voltages

Measurement of the active P, passive Q and apparent S power and cosφ

  • Range of voltages ULN: 0…440 V
  • Nominal frequency of the network: 45…65 Hz
  • frequency measurement for voltage 50…440 V in range 45,0…65,0 Hz (accuracy max. ± 0,1%m.v. + 1 digit)

– measurement cosφ: 0,00…1,00 (resolution 0,01)

Low voltage test of the circuit and insulation continuity
Test of PE wire continuity using a ±200 mA current

0,00…19,99 Ω0,01 Ω±(2% m.v. + 3 dgt)
20,0…199,9 Ω0,1 Ω
200…400 Ω1

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 TypeTest Current
Standard0,5*IΔn0…300 ms1 ms± (2% m.v. + 2 dgt)
2*IΔn0…150 ms
5*IΔn0…40 ms
Selective0,5*IΔn0…500 ms
2*IΔn0…200 ms
5*IΔn0…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

Range Resolution Test
10 mA3,3…10,0 mA0,1 mA0,3xIΔ..1,0xIΔ± 5%IΔn
30 mA9,0…30,0 mA
100 mA33…100 mA1 mA
300 mA90…300 mA
500 mA150…500 mA
1000 mA330…1000 mA1 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

Range ResolutionTest
10 mA4…20,0 mA0,1 mA0,4xIΔn..2,0xIΔn±10%IΔn
30 mA12,0…42,0 mA0,4xIΔn..1,4xIΔn
100 mA40,0…140 mA1 mA
300 mA120…420 mA
500 mA200…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

Range Resolution Test
10 mA4,0…20,0 mA0,1 mA0,4xIΔn..2,0xIΔn±10%IΔn
30 mA12,0…60,0 mA1 mA
100 mA40…200 mA
300 mA120…600 mA
500 mA200…1000 mA
  • a measurement is possible for a positive or negative forced leakage current

„m.v.” measured value.


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