49cubinok
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Good morning, we install 1 meg gensets in oil field power applications.
We recently installed a set of three gensets that are powering a small micro grid, 3.5 miles. The three gensets are paralleled to allow load sharing and ensure if one goes down they don't lose power. All three gensets are tied to a step up transformer, 12 kV, and then down the lines to a step down, then feeding two large vfds.
My my question is on grounding at the step up transformer. We normally are on a site that has a couple smaller vfds and each vfd is grounded to our grounding bus on our electrical house. At this site with the 3 gensets and the step up xfmr, the xfmr is not grounded to our electrical house. The ehouse is grounded and the transformer is grounded, but not together.
The problem that we are having is we are knocking out our genset controllers. It's not coming from the genset dc circuit, so it's coming from our controllers or down the lines to our ehouse.
Thanks for any help
We recently installed a set of three gensets that are powering a small micro grid, 3.5 miles. The three gensets are paralleled to allow load sharing and ensure if one goes down they don't lose power. All three gensets are tied to a step up transformer, 12 kV, and then down the lines to a step down, then feeding two large vfds.
My my question is on grounding at the step up transformer. We normally are on a site that has a couple smaller vfds and each vfd is grounded to our grounding bus on our electrical house. At this site with the 3 gensets and the step up xfmr, the xfmr is not grounded to our electrical house. The ehouse is grounded and the transformer is grounded, but not together.
The problem that we are having is we are knocking out our genset controllers. It's not coming from the genset dc circuit, so it's coming from our controllers or down the lines to our ehouse.
Thanks for any help