Operation

To ensure proper operation of the MCC, check the items listed below before energizing the MCC:

• Complete the initial maintenance procedures beginning with Initial Maintenance of 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.

• Perform an insulation test on the MCC (see Insulation Test).

• If the MCC is equipped with ground fault protection, properly adjust and test the ground fault protective device before energizing.

• Remove all blocks or other temporary holding means from the electrical devices.

• Remove any secondary shunt bars from the current transformers. Do not operate a current transformer with its secondary open-circuited.

• Manually exercise all switches, circuit breakers, and other operator mechanisms to ensure that they are properly aligned and operate freely.

• Electrically exercise all electrically-operated switches, circuit breakers and other mechanisms (but not under load) to ensure that the devices operate properly. An auxiliary source of control power may be required.

• Verify proper interval and contact operation of the timers.

• Verify that proper overload thermal units are installed by checking the overload selection tables against motor full load current. Motor Logic™, TeSys™ T, and IEC-style overload relays (if supplied) do not require thermal units, but are set at the lowest setting at the factory.

• Verify that all load and remote control connections have been made and that they agree with the wiring diagrams provided.

• Verify that all ground connections are made properly.

• Install the covers and close the doors; ensure all fasteners are engaged.

• Verify that lifting angles have been removed from all sections in the lineup.

• Verify that the proper top plate assembly has been installed per the provided instructions.

• Verify that over-current protection device (OCPD) settings meet the requirements for the electrical system.

• Verify that the required clearances from obstructions above and around the equipment have been met per the requirements outlined in this document.

For ArcBlok 1200 mains:

• Verify all incoming power cables are properly installed and secured:

  • Cable lacing is complete per instructions starting in Cable Lacing with ArcBlok 1200.

  • The damper and two springs on the cable vault rear panel are installed and functioning properly.

  • Closing plates are installed with conduit.

  • The space between conductors and conduit is sealed with duct seal putty.

• Verify all ArcBlok and cable vault covers are replaced and secured correctly.

1. Verify all incoming power cables are properly installed and secured:

   1. Cables pulling and termination is complete per instructions in Wire Connections with ArcBlok 2500.

   2. The conduit closure plate is installed with conduits.

   3. The space between conductors and conduits sealed with duct seal putty.

   4. The Thermal Interface Module, ArcBlok Module Front Cover, Heatsinks, and Thermal Sensors are installed correctly as instructed in Wire Connections with ArcBlok 2500.

2. Verify ArcBlok and Cable vault front and rear covers are replaced and secured correctly.

3. Verify the ArcBlok Event Indicator plunger is pushed back as instructed in ArcBlok Event Indicator.

4. Refer to deployment guide 7EN42-0247-00 for the Arcblok Event Indicator and CL110 thermal sensor commissioning procedure.