Description
Measurement of short-circuit loop parameters:
- in L-PE, L-N, L-L circuits as well as in L-PE (RCD) circuits – without tripping RCD breakers of current 30 mA.
- impedance measurement of short-circuit loops in power networks of nominal voltages: 115/200 V, 220/380 V, 230/400 V, 240/415 V and frequencies in the range of 4565 Hz..
Testing of AC and A types residual current circuit breakers:
- testing of regular and selective residual current circuit breakers of nominal differential currents: 10 mA, 30 mA, 100 mA, 300 mA, 500 mA, 1000 mA,
- IA trip current measurement,
- tA trip time measurement for 0.5In, In, 2In, 5In,
- measurement of earth continuity and touch voltage without tripping RCDs,
- functionality of automatic measurement of residual current circuit breaker parameters.
Measurement of insulation resistance at voltages: 100 V, 250 V, 500 V and 1000 V.
Low-voltage measurement of resistance, protective connections and equipotential bonding:
- measurement of continuity of protective connections with current ±200 mA,
- automatic calibration of test leads – capability of using any test leads,
- measurement of resistance with low current and acoustic signaling.
Quick verification of correctness of the PE wire connection with a touch probe.
Measurement of AC voltage.
Indication of phase sequence.
Memory of 990 measurements, data transfer to a PC over the USB interface.
MPI-505 is equipment to perform complete test and verify on electrical installations according to the most common safety standards (IEC 61557, VDE 0100, BS7671).
Measurement of short-circuit loop impedance ZL-PE, ZL-N, ZL-L
Measurement range acc. to IEC 61557: 0.13…1999 Ω for a 1.2 m test lead:
| Display range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(5% m.v +3 digits) |
| 20,0…199,9 Ω | 0,1 Ω | |
| 200…1999 Ω | 1 Ω |
- Nominal operating voltage UnL-N/ UnL-L: 115/200 V, 220/380 V, 230/400 V, 240/415 V
- Operating voltage range: 100…264 V (for ZL-PE i ZL-N) and 100…440 V (for ZL-L)
- Nominal power network frequency fn: 50 Hz, 60 Hz
- Operating frequency range: 45…65 Hz
- Maximal measurement current: 23 A at 230 V (10 ms), 40 A at 400 V (10 ms),
- Verification of correctness of the PE terminal connection with a touch (for ZL-PE)
Measurement of short-circuit loop impedance ZL-PE in the RCD mode
Measurement range acc. to IEC 61557: 0.5…1999 Ω for a 1.2 m test lead
| Display range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(6% m.v + 10 digits) |
| 20,0…199,9 Ω | 0,1 Ω | ±(6% m.v + 5 digits) |
| 200…1999 Ω | 1 Ω |
- Does not trip RCD breakers of RCD current IΔn ≥ 30 mA
- Nominal operating voltage Un: 115 V, 220 V, 230 V, 240 V
- Operating voltage range: 100…264 V
- Nominal power network frequency fn: 50 Hz, 60 Hz
- Operating frequency range: 45…65 Hz
- Verification of correctness of the PE terminal connection with a touch probe
Measurement of insulation resistance
Measurement range acc. to IEC 61557 – 2:
- 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*) | Resolution | Accuracy |
| 0…1999 kΩ | 1 kΩ | ±(3% m.v. + 8 digits) |
| 2,00…19,99 MΩ | 0,01 MΩ | |
| 20,0…199,9 MΩ | 0,1 MΩ | |
| 200…500 MΩ | 1 MΩ | |
| 200…1000 MΩ | 1 MΩ | |
| 200…1999 MΩ | 1 MΩ | |
| 2,00…3,00 GΩ | 0,01 GΩ | ±(4% m.v. + 6 digits) |
*) not exceeding the measurement range for a given voltage.
- Measurement voltage: 100 V, 250 V, 500 V and 1000 V
- Detection of presence of voltage before the measurement
- Discharge of the measured object after the measurement
- Measurements of voltage on terminals +RISO, -RISO within the range of: 0…440 V
- Measurement current < 2 mA
Low-voltage measurement of circuit continuity and resistance
Measurement of protective conductor continuity with current ±200 mA
Measurement range acc. to IEC 61557 – 4: 0.12…400 Ω
| Range | Resolution | Accuracy |
| 0,00…19,99 Ω | 0,01 Ω | ±(2% m.v. + 3 digits) |
| 20,0…199,9 Ω | 0,1 Ω | |
| 200…400 Ω | 1 Ω |
- Voltage on open terminals: 4…9 V
- Output current at R<2 Ω: min. 200 mA
- Compensation of test lead resistance
- Measurements for both polarities of current
Measurements of RCD breaker parameters (operating voltage range 100…264 V):
RCD tripping test and measurement of tA trip time (for the tA measurement function)
| RCD type | Test current multiplier | Range | Resolution | Accuracy |
| Standard | 0,5*IΔn | 0…300 ms | 1 ms | ± (2% m.v. + 2 digits) |
| 1*IΔn | ||||
| 2*IΔn | 0…150 ms | |||
| 5*IΔn | 0…40 ms | |||
| Selective | 0,5*IΔn | 0…500 ms | ||
| 1*IΔn | ||||
| 2*IΔn | 0…200 ms | |||
| 5*IΔn | 0…150 ms |
*for IΔn= 10 mA and 0.5 IΔn uncertainty is + 2% m.v. + 3 digits
Measurement of IA RCD trip current for sinusoidal differential current:
| Selected current | Measurement range | Resolution | Test current | Accuracy |
| 10 mA | 3,3…10,0 mA | 0,1 mA | 0,3xIΔn…1,0xIΔn | ± 5% IΔn |
| 30 mA | 9,0…30,0 mA | |||
| 100 mA | 33…100 mA | 1 mA | ||
| 300 mA | 90…300 mA | |||
| 500 mA | 150…500 mA | |||
| 1000 mA | 330…1000 mA |
- Capability of starting the measurement from either positive or negative half-period of forced leakage current
Measurement of IA RCD trip current for pulsating unidirectional current:
| Selected current | Measurement range | Resolution | Test current | Accuracy |
| 10 mA | 4…20,0 mA | 0,1 mA | 0,35 x IΔn …2,0 x IΔn | ±10% IΔn |
| 30 mA | 12,0…42,0 mA | 0,35xIΔ..1,4xIΔn | ||
| 100 mA | 40,0…140 mA | 1 mA | ||
| 300 mA | 120…420 mA | |||
| 500 mA | 200…700 mA |
- Capability of measurement for either positive or negative half-periods of forced leakage current
- Maximal time of the measurement current flow is 3200 ms
“m.v” – measurement value
Data Sheet
Randy (verified owner) –
I’ve been using this meter for years with no issues. It’s always worked well and is my go-to. Would happily recommend!