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what are the types used for alternator earthing,what will happen if more than two alternator is working in parallel with each having own system earthing.is there any possibility for circulating current in between two system.
BEL,
3 10782Why we should use delta connection in primary and star connection in an distribution transformer, which converts 400v a.c. voltage to 33kv.
15 49236What is the difference between CRNO and CRGO in an transformer and what is the advantages of these two.
13 73745sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in
HPCL,
2030i want bhel placement paper for electrical if anybody having pl send to my id kavitha867@myway.com immediately
Bhel,
1977in india,we use 230V,50 Hz,whereas many other countries use 110V,60Hz.what r d advs and disadvantages of each of them?
11 28244Post New Electrical Engineering Questions
why is the power generator connected as star earthed or star earthed through reactance and what its features ?
As per the Anchor capstan motor specification, full load current is 200A. starting current is 1750 A and acceleration time is less than 8 seconds. Please guide for selection of cable size.
What is current & voltage ? Voltage perform at any load without current or not?
can u please mail me the syllabus for GET exam for damodar valley corporation?
How maesure earth neutral value & how much maximum value value required in between earth & neutral.
how to select the mpcbs and contactor for 3 phase 30 hp star delta motors.for plc control.and tell me the calaculation for future use.
How to address the servo drive for motor
Why PS class CT is always preferred for Differential protection?
Which type of transformer is used for lighting loads?
A 15 kw squirrel cage motor having a maximum efficiency of 90% on a continuous full load has temperature rise of 42 degrees celcius after 30 min and 52 degrees celcius after 1 hr under the above operation conditions. a) calculate its final steady state temperature rise on continuous load and the heating time constatnt. b) if the motor is operated on a short load for 9 min estimate its temperature rise. c) calculate the maximum overload that can be applied on a short, 9 min rating so that the temperature rise is the same as the final steady state temperature rise on continuous load.
How we select the vector group of 3phase power transformer?
How do you select the pickup value of the relay?
I am designing new project sub station with 220 kV / 11 kV, 40 MVA capacity. This project have many recifier sets, which can generate 3rd harmonics. Now I have to select vector group of This transformer. To minimise 3rd harmonics, what care should I take in selection of Transformer Vecrtor group? If it is Y-Y with open Delta tertiary then what should be the rating & voltage of Tertiary Winding?
what is the formula for hv test for cable and circuit breaker..????
