ABB Air Circuit Breaker E6.2-A 4000 A

Putting into service — Introduction

Ensure the circuit-breaker is put into service for the first time or after prolonged inactivity

Test the circuit-breaker with all switchgear apparatus de-energized

Verify that the procedure is performed by a skilled person in the electrical field

Is there sufficient change of air to avoid overtemperatures?

Ensure the location is clean and free of installation refuse

Verify the circuit-breaker is mounted correctly with proper tightening torques and clearances

Power the gearmotor to charge the springs at the relevant rated voltage

Perform some closing and opening operations

Power the undervoltage coil and perform the closing operation on the circuit-breaker

Turn off the voltage supply to the trip unit

Power the undervoltage coil again and perform the closing operation on the circuit-breaker

Select the maintenance frequency based on environment

Set the circuit-breaker to the open position and discharge the springs of the operating mechanism

Is the circuit-breaker withdrawable?

Disconnect power supply to power circuit and auxiliary circuits and visibly ground the terminals on both supply and load sides

Inspections and General Cleaning

Ensure the circuit-breaker is clean

Remove dust and oily substances with a clean, dry cloth and mild detergent if necessary

Check that the interlocking devices are installed and operate correctly

Ensure interlocks are not tested in the Test or Disconnected positions

Document the maintenance frequency based on the table guidelines

Was the cable replacement performed as advised?

Frequency in standard environments

Frequency in dusty environments (dust level > 1mg/m3)

Set the circuit-breaker to the open position and discharge the springs of the operating mechanism

Is the circuit-breaker withdrawable?

Disconnect power supply to power circuit and auxiliary circuits and visibly ground the terminals on both supply and load sides

Inspections and General Cleaning

Ensure the circuit-breaker is clean