Answer / linu mohan

RELAY CODE NO.-32
DIRECTIONAL POWER RELAY

Answer / sanjay d. dabli

DPR IS DIFFERENTIAL PROTECTION RELAY & IT IS USED FOR FAULT CURRENT PROTECTION.WEATHER IT MAY EARTH FAULT OR PHASE TO PHASE FAULT. IT'S NO IS 64.

in house wiring when two wires are same colour coding and there is no any connection one end how to find which wire is earthing wire

1 Answers  

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One 200 V, 100 W bulb is connected in series with primary of a 200 V, 10 kVA transformer. If its secondary is kept open circuited, then the bulb would have (1) Full brightness (2) Poor brightness (3) A little less than full brightness (4) More than full brightness...explain

2 Answers  

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How to calculate mf when meter equipment and meter are connected

0 Answers  

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what is arc flash and what are the hazards involved

0 Answers   Reliance,

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can alternators work at leading power factor?

2 Answers  

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which connection is safer series or parallel?usually which connection we prefer at home?

5 Answers  

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Explain the advantages and disadvantages of hydropower plant?

0 Answers  

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What are objectives of energy managements ?

1 Answers   Kirloskar, RR,

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What is force on a conductor in a magnetic field ?

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If single phase supply is 220v. then why three phase supply is 660?

2 Answers  

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in india single phase is 230v and three phase is 440v but in other countries single phase is 110v and three phase is 380v why..?

2 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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