dluck
Member
- Location
- san francisco bay area
Hello,
I hope these questions are not out of bounds here.
I manage a sm/dayall 5000 sqft warehouse that until recently use electricity only a couple times a month. There is a 30kva 3 phase 480/277v transformer in the warehouse supplying power.
First question. With all circuits disabled I am still seeing 250 watts used. Is this normal for this size transformer when idling?
2nd. We only use a couple 120v circuits. There is no 208 or 3 phase equipment we are using. Could I disconnect one or two of the phases to the transformer leaving only one active to provide the stepped down 120? And hopefully reducing the idle watts to 2/3 or even 1/3 of the 250 watts being wasted now?
3rd, would adding a second single phase 480-120 3kva transformer in parallel to the existing 30kva transformer to power typical requirements and install a manual 3 phase disconnect switch be legit.
The issue is we are trying to save on electrical costs and just keeping that transformer hooked up all the time seems a waste. thanks for any help
dale
I hope these questions are not out of bounds here.
I manage a sm/dayall 5000 sqft warehouse that until recently use electricity only a couple times a month. There is a 30kva 3 phase 480/277v transformer in the warehouse supplying power.
First question. With all circuits disabled I am still seeing 250 watts used. Is this normal for this size transformer when idling?
2nd. We only use a couple 120v circuits. There is no 208 or 3 phase equipment we are using. Could I disconnect one or two of the phases to the transformer leaving only one active to provide the stepped down 120? And hopefully reducing the idle watts to 2/3 or even 1/3 of the 250 watts being wasted now?
3rd, would adding a second single phase 480-120 3kva transformer in parallel to the existing 30kva transformer to power typical requirements and install a manual 3 phase disconnect switch be legit.
The issue is we are trying to save on electrical costs and just keeping that transformer hooked up all the time seems a waste. thanks for any help
dale