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As far as i know HVL is just the trademark name for a Square D Load Interrupter Switch. When an elephant is in trouble even a frog will kick him.

Thank you, is there published information that supports this? I have looked and can not seem to find what i'm looking for When an elephant is in trouble even a frog will kick him.

I have LV breaker. I have tested these breaker with both primary and secondary injection testing and all pass. Now there are setting on the breaker that need to change. example INST need to change from 12x to 4x. Or STPU need to change from 6 to 8 etc. my question is do i need to retest...

fair point catserveng NEC, US standard, continuous load <600V I can not explain is any more simply then i did about 5 posts ago so i will cut and paste " if i have a 1200A 80% rated breaker with the LTPU set to 1 and 900A of continuous load on it then i meet code. if I adjust the LTPU to...

Thank you Tom. Yes very simple question. There are only 3 answers 1. Frame size OR 2. Trip setting OR 3. I don't know Also as stated above I am sorry if i offend you my English is not good When an elephant is in trouble even a frog will kick him.

so if i have a 1200A 80% rated breaker with the LTPU set to 1 and 900A of continuous load on it then i meet code if I adjust the LTPU to 1000A now this is a code violation? sorry English is not good perhaps i am not getting my point across When an elephant is in trouble even a frog will...

resistive load banks are unity PF so you need to calculate at 1. When an elephant is in trouble even a frog will kick him.

It required on every project i have ever done. When an elephant is in trouble even a frog will kick him.

I have a feeder that draws 900A continuously I specified 1000A 100% rated LSIG breaker. The submital i am reviewing calls for a 80% rated 1200AF with a 1000AT LSIG trip unit. Never really thought about it before but is the breaker rating (100% rated VS 80% rated) for the frame or the trip...

let take the generator and capacitance coupling the the equation. The question is will i see any harmonic loads on the neutral conductor between the main service and the generator? can someone point me to a white paper or other documentation that clarifies this point either way? When...

Lets say I have a switchboard that requires ONLY 3 Phase loads, transformer, UPS, Motors, ETC. ( no neutral is required at all) Now lets say I am feeding this from a generator where I have 4 wires from the alternator ABCN connected to the aforementioned switchboard. the N of the generator...