Routine Maintenance.

Each item of equipment manufactured by Charnvel Ltd. is designed to be of the low maintenance type, however, some simple maintenance procedures must be carried out to ensure the equipment performs as intended.

Important Note
Equipment must be isolated before work is carried out as necessary to comply with the relevant Electricity at Work Acts.
Always treat equipment as being alive and double check each and every isolation after setting up a safe method of work.

Initial Maintenance

Initial maintenance should be carried out within the first six months of service, and after the equipment has been subjected to sufficient to load and ambient temperature cycles.

All electrical connections must be checked for tightness and visually inspected for signs of overheating.

Routine Maintenance

Each item of equipment is designed to be of the low maintenance type, however, some simple maintenance procedures must be observed.
Refer also to component manufacturers information on power, control, instrumentation and other incorporated devices.

Routine maintenance should be carried out in addition to your own maintenance schedule.

• Ensure that interior and exterior of structure is free from dust and grime.
• Check integrity of rubber seals on all removable covers and doors, rectify as necessary.
• Check for the correct function of any locks or interlocks.
• Ensure that the air flow through the equipment is not restricted.
• Check operation of all devices by switching off and on ensuring that all handles and doors and interlocks are secure. Tighten any loose fixings and replace damaged or worn components as necessary. Whilst carrying out this operation remove each fuse link and check for any discolouration caused by loose connections. Clean and tighten as necessary.
• Check for signs of loose termination’s on all power connections and rectify as required.
• Check or tightness of all power connections between incoming and outgoing connections:- all connections to the incoming isolator and bolted neutral link, all connections on busbars and risers, all connections on busbar and load side of outgoing feeders.
• All small wiring connections at each control / instrument /device and at all terminals including connections to field wiring should be checked. Check for signs of loose termination ( Discolouration/ signs of heat etc. ) and rectify as required.
• Check for the correct operation of any metering, instrumentation or control circuits if fitted.
• Check and clean exterior paintwork of cubicles. Any defects in the painted surface must be rectified to prevent corrosion.

Important Note
Only replace fuses and circuit breakers with the same type and rating link as is indicated in the circuit drawings.

When optional IP2X screening is provided ensure that any unused or spare fuse ways are fitted with an un-fused carrier in order to maintain the IP shielding category. An insulated dummy fuse link must be fitted to achieve this status.

Recommended torque settings are as follows:-

Busbar Bolt Size	Min Torque	Max. Torque
M6	8 N·m	10 N·m
M8	20 N·m	25 N·m
M10	40 N·m	49 N·m
M12	69 N·m	87 N·m
M16	170 N·m	214 N·m