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Surge Protection on Substation Battery Systems

Surge Protection on Substation Battery Systems

Surge Protection on Substation Battery Systems

(OP)
Does anyone have guidance on surge protection for DC battery systems in substation applications?   

Would ungrounded/floating batteries be any more susceptible than grounded batteries?

I have found a few references to sales of surge suppressors for battery systems, but not an applications guide for determining if they are needed.  RUS Bulletin
1724E-300 Design Guide for Rural Substations lists MOVs as something to include on DC schematics, but does not indicated how to apply them.

 

RE: Surge Protection on Substation Battery Systems

I've never seen these applied in my 15 years in the field commissioning substations. I have seen devices used (varistors, etc), used to protect relay contacts from inductive dc circuits (breaker trip coils, etc.

SEL makes some nice devices that are relatively inexpensive and work very well.

http://www.selinc.com/SEL-9502/  

 

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