MCC Structure
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Complete the maintenance procedures beginning in Section 6—Maintaining the MCC and continuing up to Insulation Test. This initial maintenance is necessary to detect any shipping damage or loose connections. Do not energize the MCC until initial maintenance is complete.
NOTE: The following maintenance procedures are not necessary before energizing the MCC for the first time: Control Unit Removal, Stab Assemblies, Starter Contacts and Barriers/Insulators. -
Perform an insulation test on the MCC (see Insulation Test).
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If the MCC is equipped with ground fault protection, properly adjust and test the ground fault protective device before energizing.
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Remove all blocks or other temporary holding means from the electrical devices.
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Remove any secondary shunt bars from the current transformers. Do not operate a current transformer with its secondary shunt bars opencircuited.
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Manually exercise all switches, circuit breakers, and other operator mechanisms to ensure that they are properly aligned and operate freely.
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Electrically exercise all electrically-operated switches, circuit breakers, and other mechanisms (but not under load) to ensure that the devices operate properly. This may require an auxiliary source of control power.
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Verify proper interval and contact operation of the timers.
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Set the Motor Logic Plus overcurrent setting to the maximum service factor amperage of the motor to ensure that the proper overload protection is provided. The Motor Logic Plus overcurrent threshold is set at the lowest setting at the factory. Verify that all other settings are optimized for the application.
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Verify that all load and remote control connections have been made and that they agree with the wiring diagrams provided.
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Verify that all ground connections are made properly.
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Install the covers and close the doors; verify that they are all properly tightened.