What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection

0 Answers   ABB,

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what is softstarter?

2 Answers  

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what is residuel magnetism. and how order lead acid batteries for 24 volt. emergency lighting system.

0 Answers  

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What will be the size of copper cable (each for 3 phase and 1 neutral) from Service connection Kit-Kat to Panel Board (i.e. to main switch) for a 6 pole 3-phase AC induction motor of 200 H.P. capacity? Amp-255 A, Frequency:- 1450 rpm.

0 Answers  

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A 400KVA Transformer has 400Hz frequency.if frequency is changed to 50Hz,then what will be the new KVA rating?

2 Answers   ABC,

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Can we use the ceiling fan regulator to run drill machine having 2000 watt power consumption?

2 Answers  

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Equal resistance of 100ohm each are connected to the arms of whestons bridge, which is supplied by 2v battery. The galvanometer can sense a current low as 1microAmp. What is the smallest resistance that can be measered.

1 Answers   GATE,

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is 60hz freq better than 50 hz?&why?

1 Answers  

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why, when birds sit on transmission lines or current wires doesn't get shock?

36 Answers   College School Exams Tests, Infosys,

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Dear sir,We have a 7.5hp motor,it was running smoothly and suddenly one winding is carring more current then others(r=6.5,y=6.3,b=10)..whts wrong with tis...?

5 Answers   Hindustan Motors,

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what is the use of 6.6kV/6.6kV Transformer???

3 Answers  

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What is the differance between transformer neutral solidly earthed and transformer neutral earthed through resistor?

1 Answers   L&T,

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