Earth Resistance and Resistivity Meter and Multifunctional suitcase MPI-520

Possible measurements

• Short-circuit loop measurement:
  - impedance measurement with 23A current (44A phase-to-phase) - short-circuit resistor  R=10Ω,
  - measurement range: 95...440V, frequency 45...65Hz,
• Short-circuit loop measurement with resolution 0,01Ω, in distribution network without tiggering RCD (IΔn≥30mA):
  - 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 1000mA. (Type AC, A and B).
• Measurement of insulation resistance:
  - with test voltage 250V, 500V, 1000V,
  - measurement range up to 3GΩ,
  - 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 5sec intervals for insulation resistance characteristic,
  - safety measurement - protection against overvoltage.
• Measurement of earthing resistance.
• Bi-directional testing of PE wire continuity using 200mA 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 23/40A current measurement range in accordance with IEC 61557: 0,13...1999,9Ω
(for 1,2m lead ):

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

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

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

Measurement of earthing  R_E
Rated voltage in accordance with IEC 61557-5:
0,5Ω…1,99kΩ for 50V
0,56Ω…1,99kΩ for 25V

Insulation resistance measurement
Measurement range in accordance with IEC 61557-2:
- for U_N = 50V: 50kΩ...250MΩ
- for U_N = 100V: 100kΩ...500MΩ
- for U_N = 250V: 250kΩ...1GΩ
- for U_N = 500V: 500kΩ...2GΩ
- for U_N = 1000V: 1MΩ...3GΩ

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

Phase sequence
- phase sequence indicator: forward, reverse
- mains voltage range UL-L: 100...440V (45…65Hz) UL-L: 100...440V (45...65Hz)
- display of pase-to-phase voltages

Measurement of the active P, passive Q and apparent S power and cosφ
- Range of voltages ULN: 0...440V
- Nominal frequency of the network: 45...65Hz
- frequency measurement for voltage 50...440V in range 45,0...65,0Hz (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 ±200mA current

Voltage on open terminals: 4…9V
Test current at R<2Ω: min. 200mA 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: 0ms ... 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 6mA 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.