Answer / k.prakashchandra

You can not use metering ct as the it does not measure
current beyond 150% 0f rated.You can connect terminals of
diff relay in series with back-up relay.

tell me the operation of ELCB. How it detects a fault?

4 Answers  

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Why current shoots up in the secondary on the knee point voltage during saturation test of CT? How core saturation effects the secondary current (while the primary side is open)? What the logic behind this?

0 Answers  

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Why we use three phase world wide why not four phase or five phase being used?

8 Answers  

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why would amp draw on neutral wire be as much as amp draw on the hot leg.

0 Answers  

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Is VVVFD reduced the starting current of an induction motor?

1 Answers  

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HOW TO MEASSURED THE AMPS RATING FOR SUITABLE CABLE SIZE?

4 Answers  

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

1 Answers  

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how to convert star network in delta or vice versa...?

1 Answers   Toyota,

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What is the required value while doing the megering

1 Answers  

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7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?

0 Answers  

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which is the best, A/C DRIVES or D/C DRIVES for cranes,...... ...and why......?

2 Answers   Alstom,

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why we usually call 415 volts instead of 440 volts

3 Answers   S Tech,

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