Answer / ss

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

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.

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.

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).

What happen if you keep open the Neutral Grounding Switch in open condition of the HT Generator at starting and again on load if it open then?

1 Answers  

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why are the maintaine power factor and how can this control and this is how work.

0 Answers   Mukand,

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Why electrical power generation and transmission done in 3 phase system not more than 3 phase ?

0 Answers  

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0 Answers   CG,

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2 Answers   Glatt, MTS,

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Which type of control system is expensive — closed loop or open loop?

1 Answers   GE,

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What is meant by field loss in a DC motor?

1 Answers  

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why do motors burn out? I understand why adding parallel loads to a power source means more current moves through the circuit, and can destroy circuit elements by overheating. What about when you have a vaccuum cleaner intake flush against a floor, a room fan sitting directly against a wall, or a power drill trying to drill through something too hard?

0 Answers  

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What does OHB stand for in specifications for circuit breakers, especially found in SF6 circuit breaker?

1 Answers  

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Where can I get CPWD electrical shedule rates in web? please help me.

1 Answers  

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The maximum demand of consumer is 2 kW and his daily energy consumption is 20 units. Its Load Factor is (1) 10.15% (2) 41.6 % (3) 50 % (4) 60%

2 Answers  

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how to calculate the size of cable tray

3 Answers  

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