MI 3321 MultiservicerXA
Switchgear testing operating mode
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Interpretation of the “Repeat” message
It is not possible to differentiate between a disconnection moment at very low voltage
and a switchboard with a very low discharging time. In both cases the reading will be
0.0 s together with the “Repeat” warning. If after few repetitions the result is always 0.0
s with the “Repeat” message it can be considered as a valid 0.0 s result.
A 0.0 s reading without the “Repeat” message is a valid result.
Examples of discharging time measurement results
Displayed results:
Main result ............. Discharging time,
U ............................ Peak voltage value
Notes:
Consider any displayed warning before starting the test!
10.2.6 Voltage
Voltages and their frequency are measured in this menu. If a three-phase rotary field is
detected its direction is displayed. The phase sequence measurement conforms to the
EN 61557-7 standard.
Warning!
MI 3321 checks voltage on TP1 PE. If hazardous live voltage is detected on
TP1 PE and three-phase rotary field is not detected, instrument displays
warning message “Too high voltage on PE” and continuously beeps. In
this case, immediately remove supply from test circuit, find and eliminate
problem before any other activity!
