Back To Basics

To understand where the medium voltage power circuit breaker fits into the scheme of things, you need to understand the basics of power distribution in an industrial environment.

An industrial distribution system consists of:

Power may be distributed through various Switchgear and Switchboards, transformers and Panelboards. The medium voltage power circuit breaker is found in switchgear assembly. A switchgear assembly controls electric power circuits.

Figure 2. Typical Industrial Power Distribution

The Circuit Breaker is the main device – the heart – of the switchgear. It provides centralized control and protection of medium voltage power equipment and circuits. Its operation covers load switching, control and fault protection for generators, motors, transformers, capacitors and all types of feeder circuits.

This type of power equipment is normally found in industrial, commercial and electric utility installations. Typical applications include electric utility systems, industrial distribution systems, commercial buildings, municipal pumping stations, and transportation systems.