Answer / kavitha

Ac supply will come. because commutator in a dc machine
works as a rectifier.

Answer / mgr

It just works as AC machine.

Answer / archana

purpose of commutator is to produce continue current . if
commutator is placed we gft dc otherwise ac

What will be the capacity of the generator set which can be used for my 2 ton window air conditioner ?

1 Answers  

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ii) A shunt motor supplied at 230V, runs at 900 rpm when the current is 30A. The resistance of the armature is 0.4 ohms. Calculate the resistance required in series with the armature to reduce the speed to 600 rpm, assuming that the armature current is then 20A. [12]

0 Answers  

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Explain What will happen when direction of field current is changed (i.e, field excitation is reversed) in the following machines? 1) Alternator 2) Synchronous Motor 3) D.C Generator ( Shunt or Seies ) 4) D.C Motor ( Shunt or Seies )

3 Answers   NTPC, Transco,

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What is the difference between grid and off- grid system??

0 Answers   GVK,

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working principle of generators?

4 Answers   Adani, MahaGenco,

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Why current transformers are rated in BURDEN instead of VA?

4 Answers   Bhel,

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What is difference between 220v/50Hz & 120V/60Hz?

8 Answers  

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from which formula we select a capacitor rating?

0 Answers   CLG,

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while doing high voltage test on 11kv/433 distribution transformer why we only give 28 kv on hv side and 3kv on lv side for power transformers what is the value what factors it depends

0 Answers   Enercon,

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what is creepage distance in sub-station?

3 Answers   ABB,

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What is the difference between MCB and Earth MCB? What is the working principal of MCB?

2 Answers  

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What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.

0 Answers  

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