Answer / snowwhite10

numerical relay is a microprocessor based relay ...it works
according to the program written using microprocessor.

Answer / naresh nari

numerical relay is a relay which is operated on the bases of numbers.that numbers are coded in the program for the relay operation.hence it is operated depending on the time delay i.e number of cycles per second

Why water bubbles when D.C. Current is passed through it? Why not when A.C. Current is passed?

1 Answers  

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Can i use to 3 phase 4 wire energy meter inplace of 3 phase 3 wire energy meter ?

4 Answers  

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Is there any local or International standards that prohibit the installation of earthing pit in the planters area where the earthing pit is subject to continues soak in water?

1 Answers  

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compressor compresses air means exactly what happens?

2 Answers  

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why on delay timer used for fully automatic star delta starter?

1 Answers  

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hou we find and calculate the maximum lode capesity of transforer?

1 Answers  

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What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

1 Answers  

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what is the uses of C.V.T transformer in switch yard?

4 Answers   L&T,

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What will happen if the rotor of an induction motor is fed from a 3 phase supply and the stator short circuited ?

4 Answers  

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if a single phase 3 hp submersible pump of Crompton Greaves is moving in reverse direction and sometimes it moves in rigth direction ,then what may be the cause....

2 Answers   Crompton Greaves,

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Can we use a Potential Transformer for Auxilliary Power supply( Spring charge Motor, Lighting etc)?

1 Answers  

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Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

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