MPI-525
Catalog index: WMGBMPI525
Multi-Function Meter Of Electrical System Parameters
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Focused on insulation resistance measurements
Multifunctional meter of electrical installation parameters Sonel MPI-525 is an innovation in its category. It provides a wide range of options for measuring the parameters of electrical installations, which makes it a recommended solution for installers as well as advanced measurement engineers.
As one of the few meters on the market, Sonel MPI-525 has the ability to measure insulation resistance with the voltage up to 2500 V. Additionally, the instrument enables automatic measurement of insulation resistance of 3-, 4- or 5-core cables or wires using the optional AutoISO-2500 adapter.
With the use of the MPI-525 meter it is possible to perform precise measurement of short circuit loop impedance (resolution 0.01 Ω) in L-PE circuits in networks with RCD switches. Another valuable function of the device is the ability to measure the actual tripping time and tripping current of the RCD breaker at a single tripping of the breaker.
Features
The meter offers a wide range of functionalities. It combines the measuring capabilities of several devices, while ensuring equally good accuracy. The device can be used for all measurements for commissioning of electrical installations in accordance with applicable regulations:
- short circuit loop impedance (also in circuits secured with RCDs),
- RCD parameters,
- insulation resistance,
- earth resistance (3-pole method),
- continuity of protective and equipotential bondings,
- phase sequence test
Additional functions
- Checking the correctness of PE connection using a contact electrode.
- Measurement of voltage (0 … 500 V) and network frequency.
- Memory of 990 results.
- Wireless data transmission to a computer.
Testing the insulation with a voltage of 2.5 kV
The unique feature of the meter is the option of measuring the insulation resistance with a voltage of 2500 V. Moreover, with AutoISO-2500 adapter, the user may check RISO of 3-, 4- or 5-wire conductors and cables.
The device has a built-in timer. It may be used to set three different periods for measurements and result read-outs (in the range of 1...600 s). It also automatically calculates two absorption coefficients.
In order to ensure safety of the user, after the measurement completion or interruption, the device automatically unloads the tested object.
Inspection of electrical safety
This device may be used to inspect safety of electrical systems in households and industrial facilities. Measurements can be easily automated with:
- auto mode of residual current devices (RCD) tests,
- AutoISO-2500 adapter for automatic insulation resistance test of 3-, 4- and 5-conductor cables, without switching
Increased resistance to environmental conditions
The meter will cope well in difficult environmental conditions. Protection against penetration of dust and water is ensured by a unique housing with a level of protection IP54. It is resistant to mechanical damage, and a special design allows you to easily protect the screen by shielding using the cover of the meter. In addition to the fact that it protects against damage, it also allows you to conveniently carry and use the device in different positions.
Communication and software
You can easily transfer measurement data to your computer via USB port or wireless communication. In order to generate a report on measurements for electric shock protection, use Sonel Reports PLUS software. Saving the downloaded data to the simplest formats and printing is provided by free Sonel Reader software.
Specification
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, 2500 V,
– measurement range up to 10 GΩ,
– 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,
– elapsing T1, T2, T3 times (0…600 s) form measurement of absorption coefficients (DAR, PI or Ab1, Ab2)
– 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.
Rated operational conditions:
– operation temperature 0…+50°C
Electric security:
– type of insulation: double, according to PN-EN 61010 – 1and IEC 61557, EMC
– measurement category: IV 300 V acc. to PN-EN 61010 – 1
– protection class acc. to PN-EN 60529: IP54
Short-circuit loop impedance measurement ZL-PE, ZL-N, ZL-L
Measurement using 23/40 A current measurement range in accordance with
IEC 61557: 0,13…1999,9 Ω
(for 1,2 m lead):
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(5% m.v + 3 dgt) |
20,0…199,9 Ω | 0,1 Ω | |
200…1999 Ω | 1 Ω |
rated voltage: 95…270 V (forZL-PE i ZL-N) and 95…440 V (for ZL-L)
frequency: 45…65 Hz
Short-circuit loop impedance measurement ZL-PE RCD
Measurement using 15 mA current measurement range in accordance with
IEC 61557: 0,50…1999,9 Ω
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(6% m.v. + 10 dgt) |
20,0…199,9 Ω | 0,1 Ω | ±(6% m.v + 5 dgt) |
200…1999 Ω | 1 Ω |
rated voltage: 95…270 V
frequency: 45…65 Hz
Measurement of earthing RE
Rated voltage in accordance with IEC 61557 – 5: 0,5…1999 Ω
Range | Resolution | Accuracy |
0,00…9,99 Ω | 0,01 Ω | ±(2% m.v. + 4 dgt) |
10,0…99,9 Ω | 0,1 Ω | ±(2% m.v. + 3 dgt) |
100…999 Ω | 1 Ω | |
1,00…1,99 kΩ | 0,01 kΩ |
Insulation resistance measurement
Measurement range in accordance with IEC 61557 – 2:
– for UN = 50 V: 50 kΩ…250 MΩ
– 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
– for UN = 2500 V: 2,5 MΩ…9,99 GΩ
Range*) | Resolution | Accuracy |
0…1999 kΩ | 1 kΩ | ±(3% m.v. + 8 dgt) |
2,00…19,99 MΩ | 0,01 MΩ | |
20,0…199,9 MΩ | 0,1 MΩ | |
200…999 MΩ | 1 MΩ | |
1,00…3,00 GΩ | 0,01 GΩ | ±(4% m.v. + 6 dgt) |
1,00…9,99 GΩ | 0,1 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 phase-to-phase voltages
Low voltage test of the circuit and insulation continuity
Test of PE wire continuity using a ±200 mA current
Range | Resolution | Accuracy |
0,00…19,99 Ω | 0,01 Ω | ±(2% m.v. + 3 dgt) |
20,0…199,9 Ω | 0,1 Ω | |
200…400 Ω | 1 |
– 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 tA (for tA mode)
Measurement ranges in accordance with IEC 61557: 0 ms … up to the upper bound of the displayed value
Breaker Type |
Test Current Multiplier |
Measurement Range |
Resolution | Accuracy |
Standard | 0,5*IΔn | 0…300 ms | 1 ms | ± (2% m.v + 2 dgt) |
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 |
Precision of the differential current: for 0,5*IΔn:-8…0% dla 1*IΔn, 2*IΔn, 5*IΔn: 0…8%
Measurement of the RCD triggering current (IA) for sine waveform testing current
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 3,3…10,0 mA | 0,1 mA | 0,3xIΔ..1,0xIΔ | ± 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 | 1 mA |
It is possible to start the measurement from the positive or negative half of the forced leaking current
Measurement of the RDC triggering current (IA ) for a unidirectional half period sine
waveform test current with a 6 mA direct current offset
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 4…20,0 mA | 0,1 mA | 0,4xIΔn..2,0xIΔn | ±10%IΔn |
30 mA | 12,0…42,0 mA | 0,4xIΔn..1,4xIΔn | ||
100 mA | 40,0…140 mA | 1 mA | ||
300 mA | 120…420 mA | |||
500 mA | 200…700 mA |
a measurement is possible for a positive or negative forced leakage current
Measurement of the RCD triggering current (IA ) for direct testing current
Selected Current |
Range | Resolution | Test Current |
Accuracy |
10 mA | 4,0…20,0 mA | 0,1 mA | 0,4xIΔn..2,0xIΔn | ±10%IΔn |
30 mA | 12,0…60,0 mA | 1 mA | ||
100 mA | 40…200 mA | |||
300 mA | 120…600 mA | |||
500 mA | 200…1000 mA |
a measurement is possible for a positive or negative forced leakage current
„m.v.” measured value.
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