1- LT panel manual changeover SOP:

LT panel is a low voltage power control center where the power is received and distributed. It has two power incoming sources one is EB source and second is DG source. One time one source can be used when power supply switched off then DG backup supply is used. If the EB power supply available then the supply source is replaced as DG to EB source through changeover process.

If we want to change source EB to DG or DG to EB then then we will have to follow standard operating procedure which was written as step by step process with safety instruction so that any operation mistakes could be remove.
First of all we will have to take safety precautions then we can start changeover process as DG to EB source. The details of SOP given below mentioned.

2- Format of LT panel changeover SOP:

3- Procedure of LT panel changeover SOP:

1- Object:

LT panel manual changeover standard operating procedure.

2- Responsibility:

Technicians, technical supervisors, electrical engineers.

3- Safety instruction:

Before starting we must follow safety instruction.

• Check and verify auxiliary control supply of LT panel.
• Check and verify LT incoming supply voltage.
• The voltage should be required limit in each phase.
• Check circuit breaker should be charged.
• Check related transformer should be healthy condition.
• Check any pending work on LT panel.
• All protection relay should be healthy condition.
• All measuring meter should be in healthy condition.
• If any problem don’t open any panel cover without shutdown.

4- Procedure of LT panel changeover:

• Switch off the DG incomer circuit breaker.
• Switch ON the transformer air circuit breaker.
• Connect the other section through buscuppler.
• ON required feeder load one by one.
• Switch ON the capacitor bank panel.
• Check the power factor value.

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