Operation & Maintenance of C.B. & Switchgear

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3-Day Course

This training course and assessment program is based on the IEC 62271 Standard for HV Switchgear, Part 100 - Alternating current circuit breakers

Target Audience

Electrical Technicians, Supervisors and Electrical Management


Day 1

Electrical Hazards: Shock/Arc Flash

First Aid Treatment for electrical injury

Fault levels in a distribution system

Switchgear types and methods of arc extinction

Use of circuit breakers, contactors, HRC fuses and isolators

Day 2

Circuit breaker ratings

Rated voltage (Ur), Rated insulation level, Rated frequency (fr), Rated normal current (Ir), Rated short-time withstand current (Ik), Rated peak withstand current (Ip), Rated duration of short circuit (tk), Rated short-circuit breaking current (Isc), Transient recovery voltage related to the rated short-circuit breaking current

Design and construction of an HV circuit breaker logic control circuit

The role of a Trip Circuit Supervision Relay

Interpretation of an HV circuit breaker schematic diagram for fault finding purposes

Day 3

Routine Testing of HV Switchgear

Dielectric test on the main circuit (oil, air, vacuum and SF6 type devices)

Tests on auxiliary and control circuits

Measurement of the resistance of the main circuit

Tightness test

Design and visual checks

Mechanical operating tests

Final Knowledge Assessment