MPI-520 –USER MANUAL
CONTENTS
1Safety ................................................................................................................5
2Menu..................................................................................................................6
2.1 Wireless transmission ..............................................................................................6
2.2 Settings of measurements........................................................................................ 7
2.2.1 Network voltage and frequency.........................................................................................7
2.2.2 Main result of short circuit loop impedance measurement .................................................8
2.2.3 Measurement settings.......................................................................................................8
2.2.4 Cell autoincrementing .......................................................................................................8
2.3 Settings of the meter................................................................................................9
2.3.1 LCD contrast.....................................................................................................................9
2.3.2 LCD backlight..................................................................................................................10
2.3.3 Auto-OFF settings...........................................................................................................10
2.3.4 Date and time..................................................................................................................10
2.3.5 Factory (default) settings.................................................................................................11
2.3.6 Program update ..............................................................................................................11
2.4 Language selection................................................................................................ 11
2.5 Information about manufacturer............................................................................. 11
3Measurements................................................................................................12
3.1 Measurement of alternating voltage and frequency ............................................... 12
3.2 Checking correctness of PE (protective earth) connections................................... 12
3.3 Measurement of current, active power, reactive power, apparent power and cosφ
coefficient............................................................................................................... 13
3.4 Measurement of short circuit loop parameters....................................................... 14
3.4.1 Measurement of short circuit loop parameters in L-N and L-L circuit ...............................14
3.4.2 Measurement of short circuit loop parameters in L-PE circuit..........................................16
3.4.3 Measurement of short circuit loop impedance in L-PE circuit protected with residual
current device (RCD) ......................................................................................................18
3.4.4 Prospective short-circuit current......................................................................................19
3.5 Measurement of resistance-to-earth ...................................................................... 20
3.6 Measurement of RCD parameters ......................................................................... 23
3.6.1 Measurement of RCD disconnection current...................................................................23
3.6.2 Measurement of RCD disconnection time .......................................................................25
3.6.3 Automatic measurement of RCD parameters ..................................................................27
3.7 Measurement of insulation resistance.................................................................... 30
3.7.1 Double-lead measurement..............................................................................................30
3.7.2 Measurements with AutoISO-1000c adapter...................................................................33
3.7.3 Measurements by means of leads with UNI-Schuko outlet plug (WS-03 and WS-04)......34
3.8 Low-voltage measurement of resistance................................................................ 36
3.8.1 Measurement of resistance of protective conductors and equipotential bonding with ±200
mA current......................................................................................................................36
3.8.2 Measurement of resistance.............................................................................................38
3.8.3 Calibration of test leads...................................................................................................39
3.9 Checking sequence of phases............................................................................... 40
4Memory of measurement result data...........................................................42
4.1 Recording measurement result data in the memory............................................... 42
4.2 Viewing memory data............................................................................................. 43
