Tips For Installation & maintenance of Type FQ MCC

Regular maintenance helps
Routine checks

Carry out the following checks regularly:

Inspect all devices periodically to ensure that the equipment is in proper working order.

Check tightness of bolted joints

- Prior to energisation - Six months after load is connected - One year after the second check and then once a year.

Inspect all wiring for wear and cuts.

Look for wear of the silver plating on the stab-in contacts and on the contacts fixed to the dropper at the point where the stab-in contacts engage with the fixed contacts. The plating is part of the protection against corrosion.

Clean and lubricate the stab-in contacts once a year with HP MPL (EXXON) grease.

Look for indications of overheating, arching or insulation breakdown.

Inspect power and control contacts. Replace worn out contacts.

Inspect all auxiliary and control circuits for desired functioning.

Grease ACB parts and carry out maintenance as per ACB Instruction Manual.

Grease racking screw and telescopic rails at least once a year. Use grease ‘HP-LETYHON-2’ or ‘SYNTHOLUBE-20’ of HJ Leach & Co.

Inspect all door gaskets for wear. Replace where necessary.

Ensure that the earth wires are connected to the main earth bar except electronic devices earthing connection.

Ensure no tools or loose materials are left inside the MCC as these can cause faults.

Keep the switchboard free of dust. Use vacuum cleaner to remove the dust.

When the MCC is not in use, it is advisable to use space heaters to prevent moisture condensation in the MCC.

li>Do not operate switches and contactors if their arc chutes are removed.

You also need to know :

adlocking facility for power switches is available in ‘ON’ and ‘OFF’ positions. Facility for interlock defeat is also available on the door.

he units are mounted on telescopic rails which are specially designed to provide positive guidance and smooth movement of the unit. Telescopic rails for 200 and 300mm units offer additional tilting facility in maintenance position. The 100mm units have the door as an integral part of the unit.

For 100mm units, a lever on the door is to be pressed to pull out the unit from Service to Test or Isolated positions.

For padlocking the unit in ‘Connected’ and ‘Test’ positions, push the lever to the left and insert the padlock. It prevents access to the racking screw.