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Rockwell Automation Publication 1500-UM055I-EN-P - December 2021
Chapter 3 Common Installation
If an insulation resistance tester is used, it should indicate 50,000 megohms or greater
if the unit is isolated from the line and the motor. If the unit is connected to a motor,
the insulation resistance tester should indicate 5000 megohms or greater (phase to
ground).
Start-up Procedure
Contactor Inspection
See publication
for information on pre-energization inspection, vacuum
bottle integrity test and insulation resistance test.
Preliminary Checks
Verify the following:
•
Contactor current and voltage ratings are correct for the attached load;
•
Control voltage is correct;
•
Settings for protective relays;
•
Heater elements (if provided) in overload relay are secure and
undamaged;
•
Equipment grounding;
•
External power and control connections match electrical diagrams;
•
All hardware is correctly reinstalled and torqued to specifications (see
Recommended Torque Values on page 11
);
•
All barriers are replaced to correct positions;
•
All fuses are correct class, type and rating;
•
Mechanical interlocks and isolation switch function properly;
•
Ensure that any microprocessor-based protection relay is programmed;
•
Interior of cabinet is free from dirt, loose bolts, tools or metal chips.
Vacuum clean if necessary;
•
All tools are accounted for. If you cannot locate a tool, do not energize the
unit until it is found.
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.
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Страница 74: ...74 Rockwell Automation Publication 1500 UM055I EN P December 2021 Chapter 4 Maintenance Notes...
Страница 76: ...76 Rockwell Automation Publication 1500 UM055I EN P December 2021 Chapter 5 Spare Parts Notes...
Страница 106: ...106 Rockwell Automation Publication 1500 UM055I EN P December 2021 Appendix E History of Changes Notes...