For a 600 kVA, low-voltage grid-connected brushless synchronous generator, can loss-of-excitation be picked up reliably enough via a combination of under/over voltage and Q import limits?
My understanding is that a sudden loss of excitation (AVR fault, open-circuit field winding, etc) would...
I'm not at all familiar with UL/NEC requirements for switchboards, so please help with recommendations for protection of a single-phase 5 kVA control transformer. It's a 277/120 V unit, tapping off 1 phase of a 480 V system and supplying non-motor loads of about 25 A continuous plus around 30 A...
I have a 3-ph synchronous generator, 500 kW 415 V, feeding directly onto a (weak) grid through a standard 800 kVA, 415/11 kV distribution transformer (Delta HV, solidly grounded Star LV) via a contactor and circuit breaker. The system is new and from first synchronisation, current on phase L1...
I've asked this question regarding wind turbine applications in the energy conversion forum (thread 338315), but I imagine it equally applies to antennae and other tall structures with electrics up-tower, so will check here too.
Is anyone familiar with the requirements for (or have experience...
Is anyone familiar with the requirements for (or have experience with) earthing system testing of large wind turbines or other tower structures (particularly in the UK but I'm interested in other international input too)?
Specifically, what sort of testing is required to verify the earthing...
Greetings,
I'm looking at cable ducting arrangements for a 415 V, 600 kVA generator where the single core power cables feed out through a concrete foundation slab in which the rebar is bonded to the earthing network.
Cables are single-core and connected 2 per phase (carrying around 400 A...
I have a note from a supplier about a CT supplied with a generator AVR that its ratio is 130:1 and its "useful current range" is 325-650 A. What is meant by this in terms of the 0-325 A range? Is the response non-linear in that region so it loses accuracy, or am I missing something?
Thanks,
EK
