The MPI-508 multifunction meter is dedicated to perform diagnosis of electrical installation according to IEC 61557 standards. Digital meter MPI-508 is designed to measure impedance of a short cicuit loop also without triggering RCD, parameters of RCD, insulation resistance, continuity and also for phase sequence testing. Furthermore to measure and logging of AC voltage and current, frequency and power.
Short circuit loop measurements:
- nominal voltage of the network: 115/200V, 127/220V, 220/380V, 230/400V or 240/415V with frequency 45...65Hz
- short circuit loop impedance measurement with 15mA current and resolution 0,01Ω without tiggering RCD
Testing AC, A residual current circuit breakers
- testing of standard and selective RCDs for the rated current values 10, 30, 100, 300, 500 and 1000 mA,
Low voltage resistance, continuity of equipotential bondings and protective conductors measurements.
- measurement of continuity of protective conductors with >200mA current in two directions
- compensation of the resistance of the test leads - possibility to use any lead
Phase sequence test.
Measurement and logging of AC voltage and current, frequency and power using additional clamp.
Memory of the results of measurement 990 cells, 10000 records.
Short circuit loop impedance measurement ZL-PE, ZL-N, ZL-L
Measurement using 23/40A current measurement range in accordance with
IEC 61557: 0,13...1999,9Ω (for 1,2m lead):
| Display range | Resolution | Accuracy |
| 0,00...19,99Ω | 0,01Ω | ±(5% m.v +5 dgt) |
| 20,0...199,9Ω | 0,1Ω | |
| 200...1999Ω | 1Ω |
• nominal work voltage UnL-N/ UnL-L: 115/200V, 127/220V, 220/380V, 230/400V,
240/415V
• Voltage operating range: 100…264V (for ZL-PE i ZL-N) and 100…440V (for ZL-L)
• Nominal network frequency fn: 50Hz, 60Hz
• Frequency operating range: 45…65Hz
• Max. test current: 23A (przy 230V), 44A (przy 440V)
• PE terminal connection corectores check with the help of touch electrode (ZL-PE)
Short circuit loop impedance ZL-PE RCD
Measurement using 15mA,current measurement range in accordance with IEC 61557: 0,50...1999,9Ω
| Display range | Resolution | Accuracy |
| 0,00...19,99Ω | 0,01Ω | ±(6% m.v + 10 dgt) |
| 20,0...199,9Ω | 0,1Ω | ±(6% m.v + 5 dgt) |
| 200...1999Ω | 1Ω |
• No RCD reaction for IΔn ≥ 30mA
• Nominal work voltage Un: 115V, 127V, 220V, 230V, 240V
• Voltage range: 100…264V
• Nominal network frequency fn: 50Hz, 60Hz
• Frequency operating range: 45…65Hz
• PE terminal connection corectores check with the help of touch electrode
Insulation resistance measurement:
• forUN = 250V: 250kΩ...1GΩ
• for UN = 500V: 500kΩ...2GΩ
• for UN = 1000V: 1MΩ...3GΩ
| Display range*) | Resolution | Accuracy |
| 0...1999kΩ | 1kΩ | ±(3% m.v. + 8 dgt) |
| 2,00...19,99MΩ | 0,01MΩ | |
| 20,0...199,9MΩ | 0,1MΩ | |
| 200...999MΩ | 1MΩ | |
| 200...1999MΩ | 1MΩ | |
| 2,00...3,00GΩ | 0,01GΩ | ±(4% m.v. + 6 dgt) |
*) limited to measurement range
• Test voltages: 250V, 500V i 1000V
• Detection of votage before measurement
• automatic discharge of tested object after measurement
• Multiwired cables (max 5) insulation resistence measurement with additional adapter (AutoISO 1000A)
• measurement of voltage at the terminals +RISO, -RISO in range: 0..440V
Low voltage test of the circuit and insulation continuity
Test of PE wire continuity using a ±200mA current
| Range | Resolution | Accuracy |
| 0,00...19,99Ω | 0,01Ω | ±(2% m.v. + 3 dgt) |
| 20,0...199,9Ω | 0,1Ω | |
| 200...400Ω | 1Ω |
• Voltage on open terminals: 4…7V
• Test current at R<2Ω: min. 200mA at rated battery voltage
• Autocalibration of test leads
• Measurements for both polarizations of the current
RCD measurements (oprerating voltages range: 95...270V)
| RCD type | Test current multiplier | Range | Resolution | Accuracy |
| Standard | 0,5*IΔn | 0...300ms | 1 ms | ± (2% m.v. + 2 dgt) |
| 1*IΔn | ||||
| 2*IΔn | 0...150ms | |||
| 5*IΔn | 0...40ms | |||
| Selective | 0,5*IΔn | 0...500ms | ||
| 1*IΔn | ||||
| 2*IΔn | 0...200ms | |||
| 5*IΔn | 0...150ms |
Precision of the differential current: for 0,5*IΔn:-8...0% for 1*IΔn, 2*IΔn, 5*IΔn: 0...8%
Measurement of the RCD triggering current IA for sine waveform testing current
| Selected current | Measurement range | Resolution | Test current | Accuracy |
| 10mA | 3,3...10,0mA | 0,1mA | 0,3xIΔn...1,0xIΔn | ± 5% IΔn |
| 30mA | 9,0...30,0mA | |||
| 100mA | 33...100mA | 1mA | ||
| 300mA | 90...300mA | |||
| 500mA | 150...500mA | |||
| 1000mA | 330...1000mA |
• It is posible to start the measurement from the positive or negative half of the
forced leaking current
Measurement of the RCD triggering current (IA) for a unidirectional half period sine
waveform test current with a 6mA direct current offset
| Selected | Measurement range | Resolution | Test | Accuracy |
| 10mA | 4...20,0mA | 0,1mA | 0,4 x IΔn ...2,0 x IΔn | ±10% IΔn |
| 30mA | 12,0...42,0mA | 0,4xIΔ..1,4xIΔn | ||
| 100mA | 40,0...140mA | 1mA | ||
| 300mA | 120...420mA | |||
| 500mA | 200...700mA |
- a measurement is possible for a positive or negative forced leakage current
“m.v” - measurement value
