Message Board Thread - "Substation Capacitor Banks"

Title	By	Posted On
Substation Capacitor Banks	LoSmith	10/8/2008
I just wanted to pass on some scans that I took of a 2400kVAR capacitor back at one of our 12.47kV substations. After attending the Electrical Inspection Applications class I found a significant problem. In the class we learned sometimes it not what is hot but what is not. During the scan I found that the three phase capacitor bank only had one phase energized. The pictures indicate that the B phase capacitors are energized while the A and C phases were not. After checking the line fuses we found that the A and C phase fuses were blown but had not dropped. During my investigation I went to several of our other substations and found that all energized capacitors show radiant heat hense the moral of the story. If you see a bank of capacitors and one of them is not showing heat then it has failed or has a blown fuse.
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Re:Substation Capacitor Banks	Pete	11/5/2008
Excellent catch. You are to be commended
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Re:Substation Capacitor Banks	mickey	11/12/2008
Pete wrote: nt catch. You are to be commended Can you tell me the type fuses you are using to protect your Cap Banks? Thank you
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Re:Substation Capacitor Banks	LoSmith	11/12/2008
mickey wrote: Can you tell me the type fuses you are using to protect your Cap Banks? Thank you Each phase of the three phase bank is protected by an S & C 100 amp fuse model number SM4 part number 122150R4. Each individual 200kVAR capacitor can is protected by a EJ45 fuse. Not sure of manufacturer right off hand. Los
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Re:Substation Capacitor Banks	mickey	11/12/2008
LoSmith wrote: Each phase of the three phase bank is protected by an S & C 100 amp fuse model number SM4 part number 122150R4. Each individual 200kVAR capacitor can is protected by a EJ45 fuse. Not sure of manufacturer right off hand. Los Thank you for the quick answer.
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