Good Operating Practices for Switchgear Circuit Breakers and Contactors
Suggested practices for the operation and inspection of medium voltage (2 to 13.8 kV) and low voltage (200 to 480 volt) draw-out switchgear circuit breakers and contactors.
Image for illustration purposes.
Good operating practices are critical to obtain the best service and performance from plant equipment and to ensure a safe environment for plant personnel.
The article describes the responsibility of operating personnel and their daily checks and inspections of switchgear. We’ll also describe the best practices for operating and protecting transformers, motors, buses, cables, circuit breakers, and contactors.
We’ll discuss the load feeder overcurrent and ground fault protection practices, as well as the source and tie overcurrent protection and other important practices regarding transformers.
We’ll touch the switchgear bus transfers and discuss the issues occurring during paralleling two sources and switch time transfer schemes.
Source: Electrical Engineering Portal
