MI 3321 MultiservicerXA
Machine testing operating mode
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*Notes:
Before first use and after “Original Settings”, Password HV-test must be set in
General settings >> Password menu.
If a 5 s start timer runs out, HV-test will not start for safety. Initiate start
measurement procedure with STOP key and start test within a 5 s delay.
In case of 3-phase machine, the temporary test connection shall cover all
applicable L1, L2, L3 and N.
Examples of high voltage withstanding test results
Displayed results:
Main result ............. leakage current
Sub-result: ............. applied voltage
Notes:
Tested machine should be de-energized before the measurement!
Components and devices that are not rated to withstand the test voltage shall be
disconnected during the testing
– refer to related product standard.
Components and devices that have been voltage tested in accordance with their
product standards may be disconnected during testing.
Consider any warning on the display before starting the measurement!
Do not forget to remove the temporary L-N connection after withstanding
tests are finished .
9.2.5
Loop impedance and prospective fault current
The instrument measures the impedance of the fault loop and calculates the
prospective fault current. The results can be compared to limit values set on base of
selected protective circuit breakers or RCDs. The measurement complies with
requirements of the standard EN 61557-3.
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!
