MI 3321 MultiservicerXA
Machine testing operating mode
130
Example of Z m
L-Pe loop measurement results
Displayed results:
Z ........................ Loop impedance,
I
SC
...................... Prospective fault current,
R........................ Resistive part of line impedance,
Xl ....................... Reactive part of line impedance.
The following parameters are displayed in sub-screen for loop impedance
measurement:
IscMaxL-Pe ....... Maximum prospective fault current.
IscMinL-Pe ........ Minimum prospective fault current.
IscStd ................ Standard prospective fault current.
Ub...................... Contact voltage at maximum prospective fault current (Contact
voltage is measured against probe S terminal).
Notes:
For application and technical data of the Impedance adapter A1143 see its
Instruction manual 20 750 859.
High fluctuations of mains voltage can influence the measurement results.
Check adapter indications in case the abort
symbol appears after the start of
measurement.
Pay attention on serial port settings.
9.2.6
RCD tests
Various test and measurements are required for verification of RCD(s) in RCD protected
machines. Measurements are complies to the EN 61557-6 standard.
The following measurements and tests (sub-functions) can be performed:
- Contact voltage,
- Trip-out time,
- Trip-out current,
- RCD autotest.
Warning!
MI 3321 checks voltages on TP1 before running test and disables test in
case hazardous live voltage is detected on TP1 PE. In this case,
immediately remove supply from test circuit, find and eliminate problem
before any other activity!
