What is Coordination

To put it simply, coordination means that downstream devices (breakers/fuses) should activate before upstream devices.  This minimizes the portion of the system effected by a fault or other disturbance. At the substation level, feeder breakers should trip before the main.  Likewise, downstream panel breakers should trip before the substation feeder supplying the panel

Who should go for coordination study

Nuisance tripping? 

If you've ever had a breaker trip for a fault that should have been cleared by a downstream device, your facility would benefit from a coordination study. 

Many breakers have adjustable trip units.  Do you know where yours are set, and why?  If the answer's no, a Coordination Study is overdue

Why Coordination Study ?

To avoid nuisance tripping a coordination study is a great solution

Helps reduce unnecessary downtime!

Provides recommended settings for adjustable trip circuit breakers and relays.

Helps increase coordination ( selectivity) between devices. Identifies deficiencies in system protection. Provides recommended solutions to help correct problem areas.

Reviews and discusses the use of system devices with respect to National Electric Code requirements, and appropriate ANSI/IEEE standards.