in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

0 Answers  

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how ship earthed?

5 Answers   Marico,

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what is the RESTART INHIBIT protection?

1 Answers   Thermax,

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what is induction motor

2 Answers  

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when we should use Central Battery system and UPS system and why? in other words, what are the differences between the two systems?

1 Answers  

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what type of transformer used in soft ware parks its distribution or power transformer. like 1800 kva

3 Answers  

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How does zener phenomenon differ from avalanche breakdown?

0 Answers  

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what is significance of B-H curve? how it differs form ordinary transformers to Amorphous Transformer?

2 Answers   BARC,

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howmany electrician should maintain for a 1000 kva used plant... in kerala..

0 Answers   Godrej,

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ganaretors A check B check and C check details

1 Answers  

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How Humming noise generated in starter motor which was used the start the engine in a vehicle/car/Truck?.Moreover Starter motor was operated in DC power supply. Can you guys clarify ?

2 Answers  

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I have 200 KVA Isolation Transformer for UPS input side. & ups was having 48% load, suddenly got short what will be the reason.

1 Answers   Mukand,

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