G&W ELECTRIC SPECIALTIES - OIL FUSE CUT OUTS - WHAT KIND OF FUSES?

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PE (always learning)

PE (always learning)

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Hey Everyone,

I've been racking my brain trying to figure out what fuse type goes into a G&W Electric Specialty Co - Oil Fuse Cut Out. The oil fuse cut out is protecting the primary side of a three phase transformer, pictures of the equipment is attached. The catalog number for the oil fuse cut outs is FC42B and it is rated for 5000 Volts and 200 amps. I'm needing to find out what fuses are in this equipment so that I can model it into my power systems study so that I can do my arc flash portion of the study. The electrical contractor doesn't have the fuse information and we really can't afford to open the equipment so I was hoping that someone might know what fuses typically go into this type of equipment. I know that it could probably be a lot of different fuse types, but the equipment looks pretty specific so that may narrow it down to a decent educated guess. Pictures of the equipment are attached.

Best Regards,
Engineer in Training
 

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(my error.. I just saw there were two and this one had posts so I deleted the other without opening this one.. my bad )
 
engineerintraining12 said:
Hey Everyone,

I've been racking my brain trying to figure out what fuse type goes into a G&W Electric Specialty Co - Oil Fuse Cut Out. The oil fuse cut out is protecting the primary side of a three phase transformer, pictures of the equipment is attached. The catalog number for the oil fuse cut outs is FC42B and it is rated for 5000 Volts and 200 amps. I'm needing to find out what fuses are in this equipment so that I can model it into my power systems study so that I can do my arc flash portion of the study. The electrical contractor doesn't have the fuse information and we really can't afford to open the equipment so I was hoping that someone might know what fuses typically go into this type of equipment. I know that it could probably be a lot of different fuse types, but the equipment looks pretty specific so that may narrow it down to a decent educated guess. Pictures of the equipment are attached.

Best Regards,
Engineer in Training
Click to expand...

I think they may be using a Type "FC" Oil Fuse Link like those listed at the site below. You might contact them (https://www.monsterfuses.com/contacts/) to check if they have any relevant info. The problem is that the fuse links come in many current ratings, and so I'm not sure how you could tell which one it is without opening the cutout.

Fuses | Monster Electrical

<meta name="description" content="View our extensive selection of Fuses from Monster Electrical. Our power fuses are available for immediate shipment from our extensive inventory.">
www.monsterfuses.com www.monsterfuses.com

G&W Electric has some time-current curves that I think are for emulating oil fuse cutout links with electronically controlled cutouts, but you would have to contact G&W to see if these would be applicable to your cutouts.


GW_oil_fuse_cutout.png

The fuse link on this version of the G&W cutout is number 25 on the drawing below:
Oil_fuse_cutout _patent.png

From: https://patentimages.storage.googleapis.com/90/c7/7a/eb3e443c1b0213/US2161427.pdf
 
omg, thank you so much! It was tough finding any relevant information on this equipment due to how old it is. The existing one line shows a 200A rated fuse on the primary side of the transformer, I think I'll assume that for now.

Best Regards
 
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