Hello, hope everyone's day is going well!
I have a question regarding the transformer core ground to tank connection. I have heard situations where adding a resistor to the transformer core ground to tank connection mitigates circulating current issues for cores that have unintentional 2nd or...
Interesting. At our facilities, depending on the time of installation, the motor may or may not have a local disconnect for isolation purposes. If there is a disconnect, than of course, that disconnect has to be opened as part of the clearance procedure before any work can begin. But if there is...
Appreciate the response, bacon! Apologies, I should've specified the application. The disconnect would go on the high side of a main bank transformer for isolation purposes; the power plant wants a demarcation point with the switchyard for boundary-related reasons. My main concern is also the...
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Hope you all are doing well and thank you ahead of time for taking the time to read this post.
I wanted to get some feedback regarding arc horn versus non-arc horn design for high voltage air disconnects. Is there any industry standard/norm that dictates when arc horns should be...
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Hope everyone is having a good day!
I had a question regarding interrupting capabilities of high voltage disconnects. Per IEEE 37.30.1, this standard provides you with the ability to conduct calculations to determine the maximum amount of capacitive and excitation/resistive...
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I had a question regarding transformer blast walls. Is is permissible to mount conduit or cable tray on the outer sides of a blast wall? And is there a certain clearance from the Iso-Phase bus duct that must be kept? I can't seem to find any standards regarding transformer blast...
