Why is DC use instead of AC for protection and control circuits?

Why is DC use instead of AC for protection and control
circuits?

Question Posted / anthony

4 Answers
9136 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

Why is DC use instead of AC for protection and control circuits?..

Answer / ss

there is chances of failure of ac suply but dc suply cant
fail because it is fed from batery bank.

Is This Answer Correct ?

10 Yes

2 No

Why is DC use instead of AC for protection and control circuits?..

Answer / maddoxx

in control and protection ckt very small current is require in relays ,cb etc .The panel is placed far from the work place.so if we use small ac current there may be chance of interference by communiation frquency and signaling it also produces noise which can too interfere in other sognalling freq. so dc current there is no frequency and we can increase the accuracy and sustain the strenth of signal coming to controlling panel.

Is This Answer Correct ?

3 Yes

1 No

Why is DC use instead of AC for protection and control circuits?..

Answer / vijay balu raskar

DC is constant & continuous source. For protection & control it is suitable. Also, having quick responce without disturbance & variation. In ac opposite of dc.

Is This Answer Correct ?

2 Yes

1 No

Why is DC use instead of AC for protection and control circuits?..

Answer / tahirwasim10

Protection of a system is very necessary factor which
require fast response during faults. For protection of a
power system the D.C used instead of A.C because there are
many problems in A.C ( quantities variation problems, slow
response problems etc).

Is This Answer Correct ?

2 Yes

4 No

Post New Answer

More Electrical Engineering Interview Questions

current and voltage equations for a star connected load fed from a delta connected load.

1 Answers

what is the preventive maintence for ht panels and busbars and vcb abd acb's.

0 Answers Future Group,

How to design harmonic filter at the project stage without nowing the harmonics levels

0 Answers

i have completed deee and i've (June2012-feb 2015 experience in electrical maintenance in pvt ltd company.company having HT & LT electrical power.how to apply electrical C-license ,NOW I was resigned my job,what are requirements of applying for c-license

0 Answers

can v rotate single phase induction motor in both the direction...?

1 Answers

why 120 devided with pole and speed multiplication to determine frequency

1 Answers

What is Earthing?

16 Answers Essar,

Hi If connecting a temp generator 670KVA .415kv with step up Tx .415/11kv. I am given Generator impedances Z1 Z2 Z0 to 100MVA base. Do I need to work out the generator fault current by using these impedances i.e gen rating / impedance. Then use this as my source impedance for the calculations that follow.

0 Answers

How many kw will suply from one db

0 Answers

How to prepare electrical preventive maintenance plan & shedule of machine tools.

2 Answers

what is the minimum requirement gigaohms for the insulation test using 5kv in 300mm xlpe cable

0 Answers

how current rating of l.t cable is find

2 Answers GAIL,

For more Electrical Engineering Interview Questions Click Here