Testing Of Ac Surge Protectors - Bourns 4030 User Manual

Testing of
AC Surge
Protectors
CAUTION
AC Surge protectors must be tested with the power off.
If you chose to disregard this warning and test with the
power on and the fuses removed, please be aware that
hazardous voltages will be present at the line terminals.
The protector module's varistor voltage may be tested as follows:
• Disconnect power.
• Remove fuse(s) as well as relay(s) and indicator lights, if installed.
• Connect the positive test lead to the neutral terminal and the
negative test lead to the line terminal of the module.
• Press and hold the test button until the reading stabilizes. Read the
displayed value. This is the varistor voltage at 1 mA. Release the
test button.
Note: Directional voltage testing is important as some AC Surge
arrestors will only test properly in one direction. Care should be
taken to ensure that testing is done in both + and - direction to verify
accuracy of the test.
USER MANUAL
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