MPI-525

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 Z_L-PE, Z_L-N, Z_L-L
Measurement using 23/40 A current measurement range in accordance with
IEC 61557: 0,13…1999,9 Ω
(for 1,2 m lead):

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

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

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

Measurement of earthing R_{E
Rated voltage in accordance with IEC 61557 – 5: 0,5…1999 Ω}

Insulation resistance measurement
Measurement range in accordance with IEC 61557 – 2:
– for U_N = 50 V: 50 kΩ…250 MΩ
– for U_N = 100 V: 100 kΩ…500 MΩ
– for U_N = 250 V: 250 kΩ…1 GΩ
– for U_N = 500 V: 500 kΩ…2 GΩ
– for U_N = 1000 V: 1 MΩ…3 GΩ
– for U_N = 2500 V: 2,5 MΩ…9,99 GΩ

*) limited to measurement range.
– with UNI-Schuko additional error ±2%.
 

Phase sequence
– phase sequence indicator: forward, reverse
– mains voltage range U_L-L: 100…440 V (45…65 Hz) U_L-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

– 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 t_A (for t_A mode)
Measurement ranges in accordance with IEC 61557: 0 ms … up to the upper bound of the displayed value

Precision of the differential current: for 0,5*I_Δn:-8…0% dla 1*I_Δn, 2*I_Δn, 5*I_Δn: 0…8%

Measurement of the RCD triggering current (I_A) for sine waveform testing current

It is possible to start the measurement from the positive or negative half of the forced leaking current

Measurement of the RDC triggering current (I_A ) for a unidirectional half period sine
waveform test current with a 6 mA direct current offset

a measurement is possible for a positive or negative forced leakage current

Measurement of the RCD triggering current (IA ) for direct testing current

a measurement is possible for a positive or negative forced leakage current

„m.v.” measured value.