MPI-520

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 containing 99 memory cells.

Battery charge indicator.

AUTO-OFF function.

USB interface.

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 (for Z_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-PERCD
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 Ω…1,99 kΩ for 50 V
• 0,56 Ω…1,99 kΩ for 25 V

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

*) 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

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 (I_A ) for direct testing current

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

„m.v.” measured value.