ABB Air Circuit Breaker E6.2 5000 A

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 after a trip due to a short-circuit?

Advise replacement of cables as part of maintenance operations

Check that the interlocking devices are installed and operate correctly

Ensure interlocks are not tested in the Test or Disconnected positions

Describe any issues found during the interlock check

Maintenance Activity: Functionality

Perform maintenance as indicated in the table below

Refer to the kit sheet for detailed maintenance operations

Maintenance Activity: Lubrication

Circuit-breaker OFF: Open the circuit-breaker

Circuit-breaker connected: Switch the circuit-breaker in withdrawable version to the connected position and reposition the crank in its seat

Trip unit Parameters: Adjust the protection trip unit in accordance with the design specifications of the installation

Removal of the Ekip TT: If present, remove the Ekip TT unit

Connecting the voltage: Connect the auxiliary voltage

Closing the switchgear: Close the switchgear door

Charging the springs: Charge the closing springs

Undervoltage coil: Make sure that undervoltage coil is energized

Putting into service — Introduction

Acknowledge the necessity of the general check when the circuit-breaker is put into service for the first time or after prolonged inactivity

WARNING — RISK OF ELECTRIC SHOCK! Ensure all switchgear apparatus is de-energized before testing the circuit-breaker

Verify that only skilled persons in the electrical field perform the verifications

Perform opening and closing operations

Verify spring loading lever moves regularly

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 for fixed circuit-breakers

Visibly ground the terminals on both the supply side and load side

Inspections and General Cleaning