Answer Posted / girish kumar samal, hindalco,h

DIFFERENTIAL PROTECTION FAIL. CT DOES NOT GIVE SECONDARY
CURRENT ACCORDING TO PRIMARY. EOR WHICH DIFFERENTIAL RELAY
OPERATE.

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

2295

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A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

2559

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how 650 volts creates? where is use?

2252

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Can a generator runs after getting 1st stator earth fault.

1473

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How to calculate phase to phase difference ?

2308

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ACCORDING TO IEC WHAT SHOULD BE THE MINIMUM HEIGHT OF G.I. STRUCTURE OF CT, PT, ISOLATOR, LA?

2269

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How to check the Bushings of the transformer?

1865

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how can we design robots

2002

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WHAT ARE THE CHARACTERISTICS OF AN VOLTAG AMPLIFIER

2073

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3 shows a 415 V, 3-phase generator supplying a 3-phase 415/110 V transformer. Draw the individual and combined impedance diagrams to a base of 10 kVA. Determine the system fault kVA and the fault currents at the 415 V and 110 V busbars for short circuit faults on the transformer input or output terminals. Work in p.u. values of impedances.

2713

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What is FTA card? How it works?

2280

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Wind mill

1954

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Convert a star connected network into a delta connected network.

1168

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EXPLAIN THE TRANSFORMER MAINTENANCE?

2333

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PLZ EXPLAIN CORONA,SKIN,BIRD PALE,SPAN,SAG Effects of power cable.

2073

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