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I looked up the number in the Square D catalog. I don't think we'll be able to use it. It's a 240v Delta w/120 tap. If it was a 208Y, we could use it in numerous places as our uses for temporary power are mostly trailers, lighting loads, etc.
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“So I became a newspaperman. I hated to do it but I couldn’t find honest employment.” —Mark Twain
I looked up the number in the Square D catalog. I don't think we'll be able to use it. It's a 240v Delta w/120 tap. If it was a 208Y, we could use it in numerous places as our uses for temporary power are mostly trailers, lighting loads, etc.
We could hook it up just watch what happens. lol! Oh well maybe next time.
I ran across an interesting thing this week. We have an office building that has a step down transformer which then goes to a UPS battery system for the data racks. All seems to be working fine except one of the legs is coming across at 137 volts. 137 is outside of the acceptable fluctuations for our equipment so it shuts down.
I tracked it down by metering the power on each leg and found the high voltage problem. The electrician told me I was stupid but the meter doesn't lie. It's acting like a high leg but shouldn't and it's outside of the parameters for our UPS system and to say the least servers and switches aren't putting up with this crap either. For the few seconds the UPS tries to cover for the spike.
I'm leaning toward a bad transformer and the electrician is saying it's SRP's problem. Either way our stuff won't work on the third leg circuits. Have you run across anything like this?
Last time I had an issue like this we had a ceiling grid that was pumping out 110 volts to ground. That was kinda interesting.
We could hook it up just watch what happens. lol! Oh well maybe next time.
I ran across an interesting thing this week. We have an office building that has a step down transformer which then goes to a UPS battery system for the data racks. All seems to be working fine except one of the legs is coming across at 137 volts. 137 is outside of the acceptable fluctuations for our equipment so it shuts down.
I tracked it down by metering the power on each leg and found the high voltage problem. The electrician told me I was stupid but the meter doesn't lie. It's acting like a high leg but shouldn't and it's outside of the parameters for our UPS system and to say the least servers and switches aren't putting up with this crap either. For the few seconds the UPS tries to cover for the spike.
I'm leaning toward a bad transformer and the electrician is saying it's SRP's problem. Either way our stuff won't work on the third leg circuits. Have you run across anything like this?
Last time I had an issue like this we had a ceiling grid that was pumping out 110 volts to ground. That was kinda interesting.
Sounds like a transformer to me. Can you measure the input to the transformed from the power company and the output from the transformer to the UPS? If the power going into the transformer is OK and the power coming out of it and going to the UPS is OK, it would have to be the UPS. If it's high on one leg coming from the power company, it's their problem.
Also check your grounding connections. Sometimes a loose ground will cause a leg to spike like that.
__________________
“So I became a newspaperman. I hated to do it but I couldn’t find honest employment.” —Mark Twain
Sounds like a transformer to me. Can you measure the input to the transformed from the power company and the output from the transformer to the UPS? If the power going into the transformer is OK and the power coming out of it and going to the UPS is OK, it would have to be the UPS. If it's high on one leg coming from the power company, it's their problem.
Also check your grounding connections. Sometimes a loose ground will cause a leg to spike like that.
Yeah, The leg is high coming in to the UPS and beyond that it's the electrical contractors problem not mine. He just pissed me off when he basically said I was just a data guy and didn't know what I was talking about. I told him I spent six years in electrical and he pretty much give me the "Yeah right" eyeroll.
I looked up the number in the Square D catalog. I don't think we'll be able to use it. It's a 240v Delta w/120 tap. If it was a 208Y, we could use it in numerous places as our uses for temporary power are mostly trailers, lighting loads, etc.
Our whole shop is wired with a delta leg, old building.
So when I have to test a, lighting, rig it becomes very interesting. I usually have to bring in a genny as all my distros are three phase.
I'll never forget the first time I came across a delta leg. It was quite the learning experience and an expensive one.
Our whole shop is wired with a delta leg, old building.
So when I have to test a, lighting, rig it becomes very interesting. I usually have to bring in a genny as all my distros are three phase.
I'll never forget the first time I came across a delta leg. It was quite the learning experience and an expensive one.
I know. East St. Louis used that system for the whole city. Let's just say I had an unpleasent surprise the first time I came across it.
__________________
“So I became a newspaperman. I hated to do it but I couldn’t find honest employment.” —Mark Twain
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