Answer / akash

Power Relay is to control AC contactors with no-nc and Reverse Power Relay is used to trip the system when there is any wrong phase is coming. It is usually used in 3phase motors.

Answer / deepak.vin208

Power Relay will operate when the power is more than the set irrespective of the direction where as reverse power relay will operate when the power is transferring the opposite direction...

PLEASE TELL ME ABOUT QUESTION PAPER OF UPCL ENTERENCE EXAM.

2 Answers   UPCL,

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how the specific fuel consumption of 320 kva deisel genarator set (explain with formulas please)?

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Why breakers not synchronized when the synchroscope is going in the anticlockwise direction?

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When lag/lead/lag-lead compensation is employed?

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we the the value of frequency is 50 HZ in DG then why we said the value inductive rectance is zero in DG?

1 Answers  

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i have done diploma and btech in EE and live in Chandigarh so kindly help me how can i make my competency certificate in my area.

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What is the Impedance, inductive reactance calculations

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Why the capacitor bank is keeping on for electricity supply and keeping it off for generator supply

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diff between grounding & earthing

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What is the difference between MCCB, ACB & VCB

7 Answers  

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A 25MVA 3300/400V T/F is termed as per winding is …… a) primary 3300V & Secondary 400V b) primary 3300V & low voltage winding 400V c) High voltage winding 3300V & Secondary 400V d) High voltage winding 3300V & low voltage winding 400V

4 Answers   Engineers India Limited,

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