MV Arc Flash SWGR question.

[Bugman1400]

Has anybody seen AF rated MV switchgear used outdoors? This would be in an area that is far from any buildings or foot traffic.

Also, what are the typical provisions for retrieving the breaker out of the cubicle? I typically use the apparatus that comes with the swgr for inserting or removing the MV breakers but, that has always been inside a control house or aux building. I would assume that an outdoor application would at least require the concrete foundation to be extended to at least 6 feet in front of the cubicles.

 

[wbdvt]

I have not seen arc resistant MV switchgear. Typically the incident energy in an medium voltage area is low as the fault currents are lower than at say 480V and the gap spacings are much larger. I would assume that the design of the foundation/cable vault would take into consideration breaker removal but that is one thing to look at in the design review phase.

 

[zog]

Has anybody seen AF rated MV switchgear used outdoors? This would be in an area that is far from any buildings or foot traffic.

Also, what are the typical provisions for retrieving the breaker out of the cubicle? I typically use the apparatus that comes with the swgr for inserting or removing the MV breakers but, that has always been inside a control house or aux building. I would assume that an outdoor application would at least require the concrete foundation to be extended to at least 6 feet in front of the cubicles.

Most people use a universal remote racking system for this situation, they can be ordered with "off road" tires