what is the effect of change in supply frequency on load angle of synchronous motor,all other parameters remaining same?

2357

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What is the meaning of HT Trivector Meter ?

2466

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i have faced a problem in ro plant grunfos make bm30type pump it is 22kw pump. We start this pump using siemens 3rw 4423-ibc44, 30kw softstarter but this soft starter will frequently failier so we planed to change dol starter. So pls tell anybudy its possible or not.

1932

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What is the function of NGR for the parallel operation of alternator? whats happen when different rating of alternator are running with parallel?

2981

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what is the working process of over & under voltage relay.

2226

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some time we open engine breaker 8.0 MW load but plant not trip. and another time engine open 4.0 MW load engine trip why? individually engine breaker open & individually emergency stop why difference?

1764

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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,

2034

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what is the maximim current drawn by 1 phase and three phase welding machine

1871

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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,

2234

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63MVA,220KV/6.9KV Transformer LV side neutral is connected to Earth pit through NGR. Whether this earth pit required to connect with near by below grouding earth mat or it is to be kept separate?

2747

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what happen if the supply is given to the stator of the 3phase induction motor with out assembling the rotor ?

1919

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what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

1969

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1.What is captive power plant? 2.What is national grid?Give brief idea.

2155

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does buccholz in a transformer use batteries

4880

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Any Electrical Engineering jobs?Please refer for interviews. Thank you

1923

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