Technical Articles

transformers

Adding fuses or a CB in a pad mount transformer secondary

Hi All. I know I’ve seen a picture or two of your typical oil filled pad mounted transformer that had fuses or a breaker installed right off the paddles on the secondary compartment. I tried googling it and could not find any. I’ve asked our ABB and Cooper reps if they offer and factory installed breakers or fuses and they both said “no”. Has anyone come across anything like this? I realize on the bigger sizes it may be very

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Need some TCC curves for two fuses – can’t find them

Hi all. I have a pad mounted transformer with internal primary side 15KV rated fuses. There are two types in series. One is an expulsion fuse GE# 9F54WLD303 and one is an oil submersible protector (OSP) GE # 9F59TCD150. I don’t have them in my SKM library. I asked SKM for them and they sent me new .lib files for these but would not guarantee them. After merging them into my library and adding them to the model I don’t

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