by , on September 30, 2009

On May 23, 2009 a power plant in the Midwest experienced a severe arc flash incident. The incident occurred while racking in a closed Siemens 15 kV GMI breaker with a faulty interlock. When the (closed) breaker contacted the bus, a large arc flash occurred. The breaker was being racked in remotely (wireless), the operators were in another room and there were NO injuries of any kind. Plant personnel that were present are convinced that lives were saved that day.Arc Flash in Switchgear Remote Racking

Three companies offer Portable Remote Racking Devices. Many offer them for their switchgear as an add on. They are worth it!

CBS Nuclear

Look at what was left of the 15kV breaker

Breaker after racking

Hugh Hoagland
About author:
Hugh Hoagland is the foremost tester of clothing and PPE exposed to electrical arcs and is an arc flash expert. Read more about Hugh.

Leave a Reply