Testing contactor operation – Rockwell Automation 1512B MV Controllers, 200/400A Two-High Cabinet, Standard and Arc-Resistant Enclosure User Manual
Page 49
Rockwell Automation Publication 1500-UM055G-EN-P - May 2013
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Common Installation
Chapter 4
Testing Contactor Operation
1. Connect the appropriate external power supply (120 or 230V AC) to the
test receptacle in the control panel. Turn the selector switch to the TEST
position.
2. Electrically operate the contactor several times. Inspect the armature plate
to verify that it fully contacts the magnetic cores.
3. Turn the selector switch to the OFF position and unplug the test voltage.
4. Remove any metal filings or loose hardware from around the magnetic
cores of the vacuum contactor. The debris is attracted to the coil once it is
energized and could prevent the contactor from closing properly.
ATTENTION: Some control circuit configurations may require control
jumpers to let the contactor close during the test procedure. Do not
jumper any isolation switch contacts such as ISa or ISb (see
for the location of these contacts). Using jumpers for these
contacts may result in equipment damage or injury to personnel.