MPI-505

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,
• I_A trip current measurement,
• t_A trip time measurement for 0.5I_n, I_n, 2I_n, 5I_n,
• 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 Z_L-PE, Z_L-N, Z_L-L

Measurement range acc. to IEC 61557: 0.13…1999 Ω for a 1.2 m test lead:

• Nominal operating voltage Un_L-N/ Un_L-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 Z_L-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 Z_L-PE)

Measurement of short-circuit loop impedance Z_L-PE in the RCD mode
Measurement range acc. to IEC 61557: 0.5…1999 Ω for a 1.2 m test lead

• Does not trip RCD breakers of RCD current I_Δn ≥ 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 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

*) 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 +R_ISO, -R_ISO 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

• 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)

*for I_Δn= 10 mA and 0.5 IΔn uncertainty is + 2% m.v. + 3 digits

Measurement of I_A RCD trip current for sinusoidal differential current:

• 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:

• 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