The short circuit in any winding of the transformer is the result of?

Last Answer : In short circuit test of transformer the low voltage side is short circuited . On high voltage side the voltmeter is connected in parallel and ammeter in series and also a wattmeter is ... circuit test is done for determining impedance and losses. In this test iron losses is neglected.

169 views 1 answer

asked Sep 3, 2017 by anonymous

State advantages of short pitch winding over full pitch winding in alternators.

State advantages of short pitch winding over full pitch winding in alternators.
Last Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.

478 views 1 answer

asked May 7, 2020 by anonymous

If the % reactance upto the fault point is 20%, then the short circuit current will be

If the % reactance upto the fault point is 20%, then the short circuit current will be
Last Answer : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current

3.0k views 1 answer

asked May 8, 2018 by anonymous

In which fault the maximum short circuit current occurs?

In which fault the maximum short circuit current occurs?
Last Answer : In three phase bolted fault the maximum short circuit occurs.

130 views 1 answer

asked Mar 19, 2018 by anonymous

Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a?

Last Answer : Starting winding of a single phase motor of a refrigerator is disconnected from the circuit by means of a magnetic relay.

215 views 1 answer

asked Mar 20, 2018 by anonymous

A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts

A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts
Last Answer : A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? (A) 30 Volts (B) 480 Volts (C) 120 Volts (D) 60 Volts

223 views 1 answer

asked May 8, 2018 by anonymous

Primary winding of a transformer?

Last Answer : Primary winding of a transformer could either be a low voltage or high voltage winding.

86 views 1 answer

asked Mar 19, 2018 by anonymous

Which type of winding is used in 3 phase shell-type transformer ?

Last Answer : Sandwich type winding is used in 3 phase shell-type transformer.

197 views 1 answer

asked Mar 19, 2018 by anonymous

does the high voltage side of Transformer winding have more number of turns?

Last Answer : yes High Voltage side of Transformer winding have more number of turns. and low voltage side of Transformer winding have less number of turns.

156 views 1 answer

asked Sep 30, 2017 by anonymous

Describe the difference between an open circuit and a short circuit.

Describe the difference between an open circuit and a short circuit.
Last Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit

7.8k views 3 answers

asked Jun 29, 2019 by anonymous

The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole)

The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents
Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only

193 views 1 answer

asked Apr 29, 2018 by anonymous

Which of the following are known as the short circuit parameters of a 2- port network?

Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.
Last Answer : Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.

90 views 1 answer

asked Apr 28, 2018 by anonymous

Short circuit test on transformers is conducted to determine?

Last Answer : Short circuit test on transformers is conducted to determine copper losses.

218 views 1 answer

asked Mar 19, 2018 by anonymous

What can cause a short circuit?

63 views 0 answers

asked Mar 10, 2018 by anonymous

Which relay is preferred for phase fault on short transmission line?

Last Answer : Reactance relay is preferred for phase fault on short transmission line.

110 views 1 answer

asked Mar 20, 2018 by anonymous

Equivalent circuit of transformer

Equivalent circuit of transformer
Last Answer : Equivalent Circuit Diagram of Transformer Referred to Primary: V1 -Primary Input voltage I1 - Input Current I0- Exciting current/ No load current Im- Magnetizing component ... equivalent of secondary terminal voltage ZL- Load impedance ZL ′- Primary equivalent of load impedance

381 views 2 answers

asked May 17, 2020 by anonymous

An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to

An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V
Last Answer : An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V

259 views 1 answer

asked Jun 18, 2018 by anonymous

During open circuit test of a transformer?

During open circuit test of a transformer?
Last Answer : During open circuit test of a transformer primary is supplied rated voltage.

110 views 1 answer

asked Mar 19, 2018 by anonymous

in open circuit or no load test of transformer which side is open circuited?

Last Answer : High Voltage side is open circuited.

116 views 1 answer

asked Sep 27, 2017 by anonymous

in open circuit or no load test of transformer which side is low voltage side and which side is high voltage side?

Last Answer : Primary side is low voltage side and secondary side is high voltage side.

121 views 1 answer

asked Sep 27, 2017 by anonymous

If starting winding of a single-phase induction motor is left in the circuit, it will?

Last Answer : If starting winding of a single-phase induction motor is left in the circuit, it will draw excessive current and overheat.

234 views 1 answer

asked Mar 20, 2018 by anonymous

7 The main advantage of auto transformer over a two winding transformer is A. Hysteresis losses are reduced B. Saving in winding material C. Copper losses are negligible D. Eddy losses are totally eliminated 8 During short circuit test iron losses are negligible because A. The current on secondary side is negligible B. The voltage on secondary side does not vary C. The voltage applied on primary side is low D. Full-load current is not supplied to the transformer

7 The main advantage of auto transformer over a two winding transformer is A. Hysteresis losses are reduced B. Saving in winding material C. Copper losses are negligible D. Eddy losses are totally ... voltage applied on primary side is low D. Full-load current is not supplied to the transformer

21 views 0 answers

asked Jul 17, 2021 by jyoti kurekar

What is armature winding?

Last Answer : It is the wire wound around a aluminium metal it is found commonly in transformers or motors

106 views 1 answer

asked Jul 27, 2019 by anonymous

Damper winding in a synchronous motor

Damper winding in a synchronous motor
Last Answer : Damper winding in a synchronous motor Serves to start the motor.

87 views 1 answer

asked May 8, 2018 by anonymous

A _________ is used to measure the stator % winding temperature of the generator.

A _________ is used to measure the stator % winding temperature of the generator. (A) Thermocouple (B) Pyrometer (C) Resistance thermometer (D) Thermometer
Last Answer : A Resistance thermometer is used to measure the stator % winding temperature of the generator.

3.4k views 1 answer

asked May 8, 2018 by anonymous

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance

A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is
Last Answer : A 200 V dc shunt motor is running at 1000 rpm and drawing a current of 10 A. Its armature winding resistance is 2 Ohm. It. is braked by plugging. The resistance to be connected in series with armature to restrict armature current to 10 A, is 36 Ohm

331 views 1 answer

asked May 3, 2018 by anonymous

A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and

A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively
Last Answer : A 36 slot, 4 -pole, dc machine has a simplex lap winding with two conductors per slot. The back pitch and front pitch adopted could be respectively 19,17

588 views 1 answer

asked May 3, 2018 by anonymous

Damper winding is provided in 3 phase synchronous motors to :

Damper winding is provided in 3 phase synchronous motors to :
Last Answer : Damper winding is provided in 3 phase synchronous motors to : provide starting torque and prevent hunting

93 views 1 answer

asked Apr 29, 2018 by anonymous

Aluminium is not used as winding wire for the armature of a dc machine because

Aluminium is not used as winding wire for the armature of a dc machine because (1) aluminium has low resistivity (2) a large winding space is taken by aluminium conductors and creates ... ) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper
Last Answer : Aluminium is not used as winding wire for the armature of a dc machine because (2) a large winding space is taken by aluminium conductors and creates jointing problems (3) the thermal conductivity of aluminium is low (4) aluminium has low conductivity as compared to copper

621 views 1 answer

asked Apr 29, 2018 by anonymous

Wave winding is composed of?

Last Answer : Wave winding is composed of that even number which is exact multiple of poles + 2.

90 views 1 answer

asked Mar 21, 2018 by anonymous

Lap winding is composed of?

Last Answer : Lap winding is composed of any even number of conductors.

129 views 1 answer

asked Mar 21, 2018 by anonymous

In D.C. generators, lap winding is used for?

Last Answer : In D.C. generators, lap winding is used for low voltage, high current.

94 views 1 answer

asked Mar 20, 2018 by anonymous

In the case of lap winding resultant pitch is?

Last Answer : In the case of lap winding resultant pitch is difference of front and back pitches.

122 views 1 answer

asked Mar 20, 2018 by anonymous

In case of D.C. machine winding, number of commutator segments is equal to?

Last Answer : In case of D.C. machine winding, number of commutator segments is equal to number of armature coils.

665 views 1 answer

asked Mar 20, 2018 by anonymous

In lap winding, the number of brushes is always?

Last Answer : In lap winding, the number of brushes is always same as the number of poles.

323 views 1 answer

asked Mar 20, 2018 by anonymous

The resistance of armature winding depends on?

Last Answer : The resistance of armature winding depends on length of conductor, cross-sectional area of the conductor, number of conductors.

212 views 1 answer

asked Mar 20, 2018 by anonymous

In D.C. machines fractional pitch winding is used?

Last Answer : In D.C. machines fractional pitch winding is used to reduce the sparking.

355 views 1 answer

asked Mar 20, 2018 by anonymous

The starting winding of a single-phase motor is placed in?

Last Answer : The starting winding of a single-phase motor is placed in stator.

115 views 1 answer

asked Mar 20, 2018 by anonymous

Centrifugal switch disconnects the auxiliary winding of the motor at about what percent of synchronous speed?

Last Answer : Centrifugal switch disconnects the auxiliary winding of the motor at about 70 to 80 percent of synchronous speed.

222 views 1 answer

asked Mar 20, 2018 by anonymous

The purpose of stator winding in the compensated repulsion motor is to?

Last Answer : The purpose of stator winding in the compensated repulsion motor is to improve power factor and provide better speed regulation.

110 views 1 answer

asked Mar 20, 2018 by anonymous

In split phase motor main winding is of?

Last Answer : In split phase motor main winding is of thick wire placed at the bottom of the slots.

83 views 1 answer

asked Mar 20, 2018 by anonymous

In A.C. series motor compensating winding is employed to?

Last Answer : In A.C. series motor compensating winding is employed to reduce sparking at the brushes.

145 views 1 answer

asked Mar 20, 2018 by anonymous

In split-phase motor auxiliary winding is of?

Last Answer : In split-phase motor auxiliary winding is of thin wire placed at the top of the slots.

72 views 1 answer

asked Mar 20, 2018 by anonymous

The running winding of a single phase motor on testing with meggar is found to be ground...

The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be?
Last Answer : The running winding of a single phase motor on testing with meggar is found to be ground. Most probable location of the ground will be at the slot edge where coil enters or comes out of the slot.

116 views 1 answer

asked Mar 20, 2018 by anonymous

A centrifugal switch is used to disconnect starting winding when motor has?

Last Answer : A centrifugal switch is used to disconnect starting winding when motor has picked up about 50 to 70 per cent of rated speed.

875 views 1 answer

asked Mar 20, 2018 by anonymous

In a capacitor start motor, the phase displacement between starting and running winding can be nearly?

Last Answer : In a capacitor start motor, the phase displacement between starting and running winding can be nearly 90°.

207 views 1 answer

asked Mar 20, 2018 by anonymous

In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to?

Last Answer : In a capacitor start and run motors the function of the running capacitor in series with the auxiliary winding is to improve power factor.

710 views 1 answer

asked Mar 20, 2018 by anonymous

anonymous · Answer 1 · 2018-03-20T02:29:20+0000

The short circuit in any winding of the transformer is the result of impulse voltage.

The short circuit in any winding of the transformer is the result of?

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