M4000 Insulation Analyzer User Guide
72A-1230 Rev. F 4-13
July 22, 2005
Cannot begin a test; the test
set trips, with an overcurrent
error message
1. Isolate the cause by restarting a test after
alternately:
• Disconnecting the High Voltage Test
Cable from the M4100
• Disconnecting the High Voltage Test
Cable from the specimen (but still
connected to the M4100)
If the symptom disappears, test the cable
by referring to ”Checking the High
Voltage Test Cable” on page 4-42.
Replace the High Voltage Test Cable if
necessary.
2. Check connections to the specimen.
3. The size of the specimen may be beyond
the capacity of the test set, or the point
to which the High Voltage Test Cable is
connected may be grounded.
4. Check the HV Pothead for tracking,
arcing, pothead separation and
cleanliness. If it is faulty, replace it.
Table 4.4 M4100 Troubleshooting from Symptoms (Continued)
Symptom Suggested Action
DANGER
Avoid personal contact with
the High Voltage Test Cable
while it is connected to the
M4100. Death or severe
injury is an imminent risk.
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