Answer Posted / j.kesavan

POWER CIRCUITE R,Y,B PHASE USING THREE CT ,THIS CT OUT PUT
CONNECT IN OVER CURRENT AND EARTH FAULT RELAY , IF ANY ONE
PHASE TAKE MORE CURRENT OR EARTH FAULT THIS RELAY WILL
TRIP.SETTING THIS RELAY MINIMUM CURRENT,MINIMUM DELAY.

How to calibrate or test an LT Air Circuit breaker 440 volts, 35 KA, 800 Amps ?

1930

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WHAT IS IEC? & WHAT IS BENEFIT TO PRODUCT FROM IEC?

2135

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A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

2017

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What are the material used for inductance coil?

1157

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If we have use two power cable for incomer, that time how many use cbct for earth leakage protection? 1 or 2 if 1 way? If 2 way?

2109

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when 20hp 3 phase motor start no load condition in star or delta connection.find current and write formula.(tariq)

2087

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Rules and standards of electrical control wiring ?

1168

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What is an automatic controller?

1184

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main difference between ac and dc?

1723

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I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1820

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Is it possible to use a S1 duty class motor for crane application (S4)? If not, why?

2453

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Give some differences between open loop and closed loop control systems.

1182

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For electrical designers what are the standard should know? i want learn about this standards. how to get information/reference. anybody help in this regards please.

2153

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1671

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checking procedure of capacitor based motors.used in fans etc?

2128

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