Hi, I am looking for some recommendations: currently designing a substation which is enclosed by a fence (all standard),however, in this particular case a security fence (attached to one side of the substation fence) is extended in a large perimeter around the substation area (footprint enclosed...
Hello,
I was wondering if anyone knows of a formula available to calculate an exciter time constant.
I am looking at a DECS200 voltage regulator and I have the T'do (generator time constant) but I am looking for the Texc (exciter time constant)of a brushless machine to properly set the AVR...
I am hoping to replace some old Basler voltage regulators (type SSR 63-12F) with some new DECS200 units. The DECS200 units have a start input unlike the previous SSR regulators. I was wondering if anyone had experience with such a replacement and if so if there is an issue with leaving the START...
I am dealing with an ungrounded system which is utilizing a closed delta VT configuration to sense a SLG fault.
My question: The HV side of the VT is Wye solidly grounded - Does this configuration not introduce a ground reference into an otherwise completely ungrounded system?
I would imagine...
Hello,
I was hoping for some help in setting up an out of step protection element on an SEL 300G. The manual calls for
- Generator transient reactance
- Generator step-up transformer impedance
- Impedance of line beyond the generator step-up xfmr
My question is: what if you have more than one...
Hello,
Question regarding substation shielding: can I confirm that a metallic equipment support structure, or wooden for that matter, also double as a lightning Mast? I cannot find it specically noted in the IEEE standard.
Thanks in advance.
Hello, I have a question regarding neutral bushing ratings that I was hoping someone could help me with.
Scenario: 16MVA transformer 138kV solidly grounded Wye - 13.8kV delta. the HV phase bushings are 550kV BIL while the neutral is 15kV 400A, 95kV BIL.
This neutral bushing seems quite...
Hi, I was hoping someone on the board may be able to shed some light on an issue that I am dealing with:
Setup: Two emergency diesel generators, 600V, paralleled together on a common bus. ATS, Governors, regulators all included. Both are in droop mode.
Situation: When a true utility failure...
Hi, I was wondering if anyone here could highlight possible issues faced with paralleling two HRG Hydro generators (same manufacturer, same size, same speed) to a common 5kV bus, and subsequently out to the utility through a common transfomer.
Assuming, both generators have same type of voltage...
Hello,
I was wondering if someone could suggest pro's and con's to the following configuration I have seen at a hydroelectric generating facility:
Generator: High resistance grounded
GSU trasformer: ungrounded wye (4.2kV)/ delta (69kV).
There is one station service transformer on the 4.2kV...
