I've got a bit of a head scratcher on my hands. Last night I had a ground fault trip on a substation caused by a fault on an adjacent feeder. See Pic below for diagram.
The station that tripped for the ground fault is a medium voltage 14.4kV to 2.1kV station (Grounded Wye Primary / Delta...
I'm designing a small 25kV to 4.14kV distribution substation for a customer who needs a delta service. We don't typically supply a delta service so I do not have much experience with it. The station transformer will be a 5/7.5 MVA wye - delta and will be too small for an LTC on the tank. For...
I've had a question posed by one of my construction crews regarding a 115kV to 69kV station we are converting to all 115kV. All the bus work is designed to meet 115kV standards already, but the low side switch currently on site is a 115kV switch spaced at the 69kV separation of 6'. We are in the...
