Answer Posted / sandeep

In case of any three pointstarter NVC is connected to the shunt field winding so if voltage is fall certain value the no volt release coil de magnetise so motor will be off. But in case of four point starter the no volt release coil is directly connected to the supply so the NVC no way the demagnetized.

technically, what is the reason behind starting the motor star the delta connection .. and what other ways to do this rather than using " star-delta transformer"

1921

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what does vector group Dyn11 tell us? also tell me how will u differentiate between phase lead and phase lag thru this vector group

2028

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What is the function of the circuit breaker failure relay?

2327

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A 100W electric lamp is supplied from a 115V, 60HZ source. The peak instantaneous power dissipated in the lamp filament is

2329

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i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

2121

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what is the function of capacitor duty contactor in an capacitor panel???

4093

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how open delta PT works & what is its construction?

2191

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Why the frequency of ac in india is 50 hz but in some other countries it is 60 hz.

2088

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Type of motor stater detail and working detail

1614

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is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

2025

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Can we use shunt trip coil instead of trip coil with protection relay for protection?

1691

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At what factor resistance r of a conductor depends?

1061

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Actuality I have at home electrical panel with 220v 50hz, and I want to converter from there to 110v 60hz, to wiring on the half of my house. Also I like to keep another half of my house with the original 220v 50hz. What is the best and safety way to do?

1768

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How calculated single phase induction motor req. Capacitor?

1527

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Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.

5341

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