1 - Circuit breaker PPM:

PPM is a planned preventive maintenance which is planned in annually basis activity schedule. Any equipment PPM schedule can be done according his nature and characteristic. This activity is done for maintaining health of equipment.

Here we are going to discuss about circuit breaker preventive maintenance so that health could be maintain. PPMschedule can be categorized in daily, monthly, quarterly, half yearly and yearly. The parts of equipment is checked in this schedule activity like as circuit breaker arch cute, safeties, releases and other mechanical parts. Accept daily, for other schedule activity, a shut down of equipment will be require.

2 - Circuit breaker PPM checklist format :

2 - Circuit breaker PPM Schedule :

• Weekly PPM schedule.
• Monthly PPM schedule.
• Quarterly PPM schedule.
• Half yearly PPM schedule.
• Yearly or Annually PPM Schedule.

3 - Circuit breaker PPM Procedure :

PPM working procedure is carried out according time schedule. The procedure of PPM is going to explain according time schedule as per below mentioned.

1 - Daily inspection procedure and check list.:

Daily check is carried out as monitoring and visibly inspection type. If any problem is found out in daily check then action is taken.

• Check total load and unbalance load phase wise.
• Check input voltage.
• Check power factor.
• Check protection relay errs.
• Check all protection relay setting as overload, earth fault, short circuit etc.
• Check breaker function manual and auto.

2 - Monthly PPM procedure.:

Monthly ppm of circuit breaker is carried out after rackout from panel and other safety precautions.

• Switch Off the power supply from electrical panel and circuit breaker also should be rack out.
• Use lock out and tag out on the electrical panel.
• Daily check activity is also carried out with monthly schedule.
• Clean the arch chute with emery paper and air blower.
• Clean all breaker inside with air blower.
• Check and tight all loose connection with hot spot.

3 - Quarterly PPM procedure:

Quarterly ppm of circuit breaker is carried out after rack out from panel and other safety precautions.

• Switch Off the power supply from electrical panel and circuit breaker also should be rack out.
• Use lock out and tag out on the electrical panel.
• Monthly PPM schedule activity also carried out .
• Daily check activity is also carried out with quarterly schedule.

4 - Yearly or annually PPM procedure:

Yearly ppm of circuit breaker is carried out after rackout from panel and other safety precautions.

• Switch Off the power supply from electrical panel and circuit breaker also should be rack out.
• Use lock out and tag out on the electrical panel.
• All protection relay is tested and calibrated through testing equipment.
• All releases coils is tested with according default setting.
• All mechanical parts are checked and repaired as arch chute.
• All moving and fix contact terminal connection are checked.

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