why capacitor bank always connected in delta,why not in
star to a system?
Answer Posted / roysayan01
The reasons are-
1) The equivalent capacitance of a delta bank is more than
the equivalent capacitance of a series capacitor bank and so
more the capacitance more the reactive power will it supply
& since capacitor bank's sole purpose is to supply reactive
power, delta connection will serve better.
2) If there is any circulating current in the bank then in
delta this circulating current remains within the bank &
dont get spread to whole system unlike in star connection.
(for easy remembrance- due to the triangle shape of delta
connection circulating current circulates within the
triangle only)
3)In delta, phase current=line current/1.732
i.e the phase current becomes smaller and thus the losses
also decreases.
If ny1 disagrees or ve ny other questions do feel free to
mail me at roysayan01@gmail.com. I may be late in replying
but I will reply for sure.
Is This Answer Correct ? | 90 Yes | 10 No |
Post New Answer View All Answers
-What shall be short circuit current of LV switchgear for a 1000 kva, 11.415kv, 3 phase tranformer with 5% reactance.
why we can use 1 to 5V dc
How do we arrive at selecting reactive capacitance value as 30% of h.p rating of motor?
what is RFCT and Insulgard Relay & It's function?
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.
we have two motors 1250kW,6.6kV to be coupled on the same shaft ,so please provide assistance for their synchronisation.
whats the existence of reactive power and when it arises?
what is cause of static electricity? I experience shock when i touch metal equipment in a room ,furher check shows earth leakage showing 80ma at the DB near to the 400 MCCB?
1.What is captive power plant? 2.What is national grid?Give brief idea.
explain which quantities change in the starting and the and the running condition in induction motor
how can check the resistance of battery contact?
what are the condition that makes hooter blow?
state the disadvantages of carbon filament???
What will happen if i used 11KV earth ht kit to 11 KV / 11 KV cable termination?
What is meant by reset level of the relay?