Why we are using LA Rating 10kA in 66 kv substation
Answer Posted / vivek
LA require very low resistance because lightening is impulse kind of thing and transient time is very low so we need to pass very high current in very low time to ground so rating is done like this....
Is This Answer Correct ? | 11 Yes | 0 No |
Post New Answer View All Answers
What will happened if the neutral of the (star connected secondry) Xformer disconnected? (if its Above KVA rated one)
DIFFERENCE BETWEEN NORMAL TRAFO AND THRISTER TRAFO?
wish of these transformer uses oil?
which type of cabel
what is the string efficiency
what is the difference between Central Battery System and UPS in applications and uses? and why UPS suitable for Computers and central battery for emergency lighting?
Classify drilling machines.
How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?
WHAT KIND OF LIGHTENING PROTECTION SCHEMS CAN BE ADOPTED FOR THE FLAT ROOF OF BIG DIMENSION.
A 400 V, 50 Hz, Δ connected synchronous generator has a field reactance of 0.1 Ω and armature resistance of 0.015 Ω. At full load, the machine supplies 1200 A at 0.8 pf lagging. Under full-load conditions, the friction and windage losses are 40 KW and the core losses are 30 KW. What is the machine’s overall efficiency? Ignore any field circuit losses.
How do I calculate/select Droop CT ratio for various capacity of generators?
please I wont know how to calculate the vector group for power transformer ZNyn11 best regard.
How to calculate the External Resistance required for 60HP slipring motor in case no any data of the Motor is available???
what is the purpose of silicon dropper used in battery charger?
WHAT IS THE SIGNIFICANCE OF VECTOR GROUPS IN TRANSFORMER? WHAT WILL BE EFFECT WHEN PHASE DISPLACEMENT CHANGES IN TRANSFORMER?WHAT IS THE NEED TO BE PHASE SHIFT CHANGE BETWEEN THE PRIMARY AND SECONDARY WINDING