The multifunctional meter of electrical installation parameters Sonel MPI-540-PV is an advanced tool created in particular for measuring parameters of photovoltaic installations. With the use of one device, it is possible to carry out a whole range of tests on the DC and AC sides in accordance with the guidelines of the EN 62446 standard. In addition, the Sonel MPI-540-PV is also used to carry out all measurements to determine the safety condition of domestic as well as industrial electrical installations. The presented meter is a device with advanced capabilities, dedicated to specialists operating in the installation and electrical industry.
When measuring the parameters of a photovoltaic installation, the meter automatically recalculates the parameters to the STC (Standard Test Conditions) reference conditions. Measurements of voltages, currents and power on the AC and DC side of the inverter will verify its efficiency. After transferring the data stored in the meter’s memory to the Sonel Reports PLUS program, it is possible to generate a report of photovoltaic installation parameters.
In order to automate measurements, the Sonel MPI-540-PV meter has been additionally enriched with the function of testing residual current devices in Auto mode. The instrument also has measurement sequences pre-programmed by the manufacturer (so-called autotests), which can be extended with own sequences if necessary. The capabilities and functionality of the meter will be additionally enhanced by a suitably selected additional accessory, e.g. the AutoISO-1000C adapter, which enables the automatic measurement of insulation resistance of 3-, 4- and 5-core cables.
IRM-1, small, but indispensable for testing PV systems. By measuring solar radiation values, as well as panel and ambient temperatures, it provides the necessary data to convert the results into STC conditions. A built-in recorder with a memory of 5000 records enables the instrument to be used as a tool in the PV plant design process, as well as to diagnose panel shading problems.
MPI-540-PV | Specifications – electrical installation parameters
Measurement functions | Measurement range | Display range | Resolution | Accuracy |
---|---|---|---|---|
Fault loop impedance | ||||
Fault loop ZL-PE, ZL-N, ZL-L | 0.13 Ω…1999.9 Ω acc. to IEC 61557 | 0.00 Ω…1999 Ω | from 0.001 Ω | ±(5% m.v. + 30 digits) |
Fault loop ZL-PE in RCD mode | from 0.50 Ω…1999 Ω acc. to IEC 61557 | 0.00 Ω…1999 Ω | from 0.01 Ω | from ±(6% m.v. + 5 digits) |
Measurements of RCD parameters | ||||
RCD tripping test and measurement of tripping time tA measuring current 0.5 IΔn, 1 IΔn, 2 IΔn, 5 IΔn | ||||
general and short-time delay RCD | 0 ms…300 ms | 0 ms…300 ms | 1 ms | from ±(2% m.v. + 2 digits) |
selective RCD | 0 ms…500 ms | 0 ms…500 ms | 1 ms | from ±(2% m.v. + 2 digits) |
Measurement of RCD tripping current IA measuring current 0 0.2 IΔn…2.0 IΔn | ||||
for sinusoidal residual current (AC type) | 3.3 mA…1000 mA | 3.3 mA…1000 mA | from 0.1 mA | ±5% IΔn |
for unidirectional residual current and unidirectional with the 6 mA DC bias (type A) | 3.5 mA…700 mA | 3.5 mA…700 mA | from 0.1 mA | ±10% IΔn |
for direct residual current (type B)) | 2.0 mA…1000 mA | 2.0 mA…1000 mA | from 0.1 mA | ±10% IΔn |
Earth resistance | ||||
3- and 4-pole method | from 0.50 Ω…1.99 kΩ acc. to IEC 61557-5 | 0.00 Ω…1,99 kΩ | from 0.01 Ω | from ±(2% m.v. + 3 digits) |
3-pole + clamp method | 0.00 Ω…1.99 kΩ | 0.00 Ω…1.99 kΩ | from 0.01 Ω | from ±(2% m.v. + 4 digits) |
2-clamp method | 0.00 Ω…99.9 kΩ | 0.00 Ω…99.9 kΩ | from 0.01 Ω | from ±(10% m.v. + 4 digits) |
Resistance-to-earth | 0.0 Ω m…99.9 kΩm | 0.0 Ωm…99.9 kΩm | from 0.1 Ωm | Depending on accuracy of RE measurement |
Insulation resistance | ||||
Measuring voltage 50 V | 50 kΩ…250 MΩ acc. to IEC 61557-2 | 0 kΩ…250 MΩ | from 1 kΩ | from ±(3% m.v. + 8 digits) |
Measuring voltage 100 V | 100 kΩ…500 MΩ acc. to IEC 61557-2 | 0 kΩ…500 MΩ | from 1 kΩ | from ±(3% m.v. + 8 digits) |
Measuring voltage 250 V | 250 kΩ…999 MΩ acc. to IEC 61557-2 | 0 kΩ…999 MΩ | from 1 kΩ | from ±(3% m.v. + 8 digits) |
Measuring voltage 500 V | 500 kΩ…2.00 GΩ acc. to IEC 61557-2 | 0 kΩ…2.00 GΩ | from 1 kΩ | from ±(3% m.v. + 8 digits) |
Measuring voltage 1000 V | 1000 kΩ…4.99 GΩ acc. to IEC 61557-2 | 0 kΩ…9.99 GΩ | from 1 kΩ | from ±(3% m.v. + 8 digits) |
Resistance of protective conductors and equipotential bondings | ||||
Measurement of resistance of protective conductors and equipotential bondings with ±200 mA current | 0.12 Ω…400 Ω acc. to IEC 61557-4 | 0.00 Ω…400 Ω | from 0.01 Ω | ±(2% m.v. + 3 digits) |
Measurement of resistance with low current | 0.0 Ω…1999 Ω | 0.0 Ω…1999 Ω | from 0.1 Ω | ±(3% m.v. + 3 digits) |
Light intensity | ||||
Measurement in luxes (lx) | 0 lx…399.9 klx | 0 lx…399.9 klx | from 0.001 lx | from ±(2% m.v. + 5 digits) |
Measurement in feet-candles (fc) | 0 fc…39.99 kfc | 0 fc…39.99 kfc | from 0.001 fc | from ±(2% m.v. + 5 digits) |
Phase sequence indication | in the same direction (correct), opposite direction (incorrect), UL-L voltage: 95 V…500 V (45 Hz…65 Hz) |
“m.v.” – measured value
MPI-540-PV | Specifications – 3-phase power quality recorder
The device is designed to work with mains:
Supported systems:
Parameter | Measuring range | Max. resolution | Accuracy |
---|---|---|---|
Alternating voltage (TRMS) | 0.0…500 V | 0.01% Unom | ±0,5% Unom |
Alternating current (TRMS) | depending on clamp* | 0.01% Inom | ±2% m.v. if m.v. ≥ 10% Inom, ±2% Inom if m.v. < 10% Inom , (error does not account for clamp error) |
Frequency | 40.00…70.00 Hz | 0.01 Hz | ±0.05 Hz |
Active, reactive, apparent and distortion power | depending on configuration (transducers, clamps) | 4 significant digits | depending on configuration (transducers, clamps) |
Active, reactive and apparent energy | secondo la configurazione (sensori, pinze) | 4 significant digits | as power error |
cosφ and power factor (PF) | 0.00…1.00 | 0.01 | ±0.03 |
Harmonics | |||
Voltage | as for alternating voltage True RMS | as for alternating voltage True RMS | ±5% m.v. if m.v. ≥ 3% Unom, ±0,15% Unom if m.v. < 3% Unom |
Current | as for alternating current True RMS | as for alternating current True RMS | ±0,5% m.v. if m.v. ≥ 10% Unom, ±0,5% Unom jeśli m.v. < 10% Unom |
THD | |||
Voltage | 0.0…100.0% (relative to RMS value) | 0.1% | ±5% |
Current | 0.0…100.0% (relative to RMS value) | 0.1% | ±5% |
Unbalance factor | 0.0…10.0% | 0.1% | ±0.15% (absolute error) |
MPI-540-PV | AC currentmeasurment (True RMS) with clamp
C-4A | C-5A | C-6A | C-7A | F-1A | F-2A | F-3A | |
---|---|---|---|---|---|---|---|
Rated current | 1000 A AC | 1000 A AC 1400 A DC |
10 A AC | 100 A AC | 3000 A AC | 3000 A AC | 3000 A AC |
Frequency | 30 Hz…10 kHz | DC…5 kHz | 40 Hz…10 kHz | 40 Hz…1 kHz | 40 Hz…10 kHz | 40 Hz…10 kHz | 40 Hz…10 kHz |
Max. diameter of measured conductor | 52 mm | 39 mm | 20 mm | 24 mm | 380 mm | 250 mm | 140 mm |
Minimum accuracy | ≤0,5% | ≤1,5% | ≤1% | 0,5% | 1% | 1% | 1% |
Battery power | – | √ | – | – | – | – | – |
Lead length | 2.2 m | 2.2 m | 2.2 m | 3 m | 2.5 m | 2.5 m | 2.5 m |
Measurement category | IV 300 V | IV 300 V | IV 300 V | III 300 V | IV 600 V | IV 600 V | IV 600 V |
Ingress protection | IP40 | IP40 | IP40 | IP40 | IP67 | IP67 | IP67 |
MPI-540-PV | Specifications – photovoltaic installation parameters
Measurement functions | Display range | Resolution | Accuracy |
---|---|---|---|
Open circuit voltage UOC | 0.0 Ω…1000 V | from 0.1 V | from ±(3% m.v. + 2 digits) |
Short circuit current ISC | 0.00 Ω…20.00 A | 0.1 A | ±(3% m.v. + 0.10 A) |
IRM-1 | Specifications
Parameter | Measurement range | Display range | Resolution | Accuracy |
---|---|---|---|---|
Irradiance | ||||
Measurement in W/m2 | 100 W/m2 …1400 W/m2 | 0 W/m2 …1400 W/m2 | 1 W/m2 | ±(5% m.v. + 2 digits) |
Measurement in BTU/ft2 h | 32 BTU/ft2 h…444 BTU/ft2 h | 0 BTU/ft2 h…444 BTU/ft2 h | 1 BTU/ft2 h | ±(5% m.v. + 2 digits) |
PV and ambient temperature | ||||
Measurement in °C | -20.0°C…100.0°C | -20.0°C…100.0°C | 0.1°C | ±(1% m.v. + 5 digits) |
Measurement in °F | -4.0°F…212.0°F | 4.0°F…212.0°F | 0.1°F | ±(1% m.v. + 5 digits) |
Inclination angle | -90°…+90° | -90°…+90° | 1° | ±2° |
Position direction – compass | 0°…360° | 0°…360° | 1° | ±5° |
“m.v.” – measured value