How the two winding transformer is linked ?

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asked Aug 9, 2017 by anonymous

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

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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

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asked May 20, 2018 by anonymous

A 400V/100 V, 10 KVA two-winding transformer is reconnected as an auto-transformer across a suitable

A 400V/100 V, 10 KVA two-winding transformer is reconnected as an auto-transformer across a suitable voltage source. The maximum rating of such an arrangement could be A) 50 KVA B) 15 KVA C) 12.5 KVA D) 8.75 KVA

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asked Apr 25, 2018 by anonymous

A 1100 kVA, 11 kV/1.1 kV conventional two-winding transformer is connected as a 12.1 kV/11 kV step-down ...

A 1100 kVA, 11 kV/1.1 kV conventional two-winding transformer is connected as a 12.1 kV/11 kV step-down auto-transformer. The rating of the auto-transformer is (A) 1000 kVA (B) 1100 kVA (C) 11000 kVA (D) 12100 kVA

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asked Sep 1, 2018 by anonymous

Compare auto transformer with two winding transformer.

Last answer: Autotransformer and Two winding transformer

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asked May 17, 2018 by anonymous

A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity

A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity power factor. If it is re-configured as a 500 V/750 V auto-transformer, its efficiency at its new rated load at unity power factor will be (A) 95.752% (B) 97.851% (C) 98.276% (D) 99.241%

Last answer: A single-phase, 50 kVA, 250 V/500 V two winding transformer has an efficiency of 95% at full load, unity power factor. If it is re-configured as a 500 V/750 V auto-transformer, its efficiency at its new rated load at unity power factor will be 98.276%

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222 views 1 answer

asked Apr 11, 2018 by anonymous

A two -winding single phase transformer has a voltage regulation of 4.5% at full - load and unity power ...

A two -winding single phase transformer has a voltage regulation of 4.5% at full - load and unity power -factor. At full -load and 0.80 lagging power-factor, the voltage regulation will be: (A) 4.5% (B) less than 4.5% (C) more than 4.5% (D) none of the above

Last answer: A two -winding single phase transformer has a voltage regulation of 4.5% at full - load and unity power -factor. At full -load and 0.80 lagging power-factor, the voltage regulation will be: more than 4.5%

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asked May 24, 2018 by anonymous

Two generating stations G1 and G2 of ratings 10 MVA and 8 MVA respectively are linked by a line rated at 5

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asked Jun 17, 2018 by anonymous

Which one is not a valid condition for the wave winding?

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asked Jun 4, 2018 by anonymous

A 200 V dc motor takes a field current of 2 A to generate a back emf of 180 V. If the field winding resistance is

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asked May 8, 2018 by anonymous

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asked Apr 29, 2018 by anonymous

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

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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

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494 views 1 answer

asked Apr 9, 2018 by anonymous

The rotor winding of a three phase wound rotor induction motor is equipped with a three phase diode...

The rotor winding of a three phase wound rotor induction motor is equipped with a three phase diode rectifier connected to the slip rings and rectifier output is connected with chopper drive. Compared to conventional rotor resistance control scheme, the chopper controlled method A) Enhances the motor rating B) Maintains the motor rating as such C) Derates the motor D) None of the above

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asked Mar 20, 2018 by anonymous

In case of conductively compensated D.C. series motors, the compensating winding is provided?

Last answer: In case of conductively compensated D.C. series motors, the compensating winding is provided in series with armature winding.

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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.

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asked Mar 20, 2018 by anonymous

After the starting winding of a single phase induction motor is disconnected from supply, it continues to run only on?

Last answer: Reason is kinetic energy

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asked Mar 20, 2018 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.

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asked Mar 20, 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.

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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.

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asked May 18, 2018 by anonymous

A 4-pole, 3-phase, double-layer winding is housed in a 36-slot stator for an ac machine with

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asked May 3, 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

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asked Apr 29, 2018 by anonymous

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

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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.

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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.

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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.

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141 views 1 answer

asked Mar 3, 2018 by anonymous

In synchronous motor, does the winding losses vary with load?

Last answer: No, in the synchronous motor the winding losses do not vary with load.

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492 views 1 answer

asked May 17, 2018 by anonymous

Distributed winding and short chording employed in AC machines will result in

Distributed winding and short chording employed in AC machines will result in (A) increase in emf and reduction in harmonics (B) reduction in emf and increase in harmonics (C) increase in both emf and harmonics (D) reduction in both emf and harmonics

Last answer: Distributed winding and short chording employed in AC machines will result in reduction in both emf and harmonics

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382 views 1 answer

asked May 8, 2018 by anonymous

Damper winding in a synchronous motor

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

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asked Aug 13, 2019 by Alacrity

the volt per turn of a certain single phase transformers is 1.7. the transformer has a step ratio of 3825/255volt. calculate the respective number of turns in each winding

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49 views 0 answers

asked Oct 15, 2018 by anonymous

In Scott connection transformer the turns ratio of main winding and teaser winding is ?

Last answer: Turns ratio= N1/ N2 IN Scott connection Main transformer turns ratio = N1 /N2 Teaser transformer turns ratio= 0.866N1/N2 Where N1= number of turns in primary winding N2= number of turns in secondary winding

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128 views 1 answer

asked May 22, 2018 by anonymous

The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary

The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary output voltage will be (A) 3.6 V. (B) 2.5 V. (C) 3.0 V. (D) 6.0 V.

Last answer: The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary output voltage will be 3.0 V.

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215 views 1 answer

asked May 13, 2018 by anonymous

In a transformer, low voltage winding is placed near the core in case of concentric windings so

In a transformer, low voltage winding is placed near the core in case of concentric windings so as to 1. Reduce the leakage flux 2. Reduce the insulation requirement 3. Reduce the risk of voltage shock in case of insulation breakdown 4. Reduce the core loss From these, the correct answer is (a) 1, 2, 3 (b) 2, 3, 4 (c) 1, 2, 3, 4 (d) 2, 3

Last answer: In a transformer, low voltage winding is placed near the core in case of concentric windings so as to 1. Reduce the leakage flux 2. Reduce the insulation requirement 3. Reduce the risk of voltage shock in case of insulation breakdown 4. Reduce ... ) 1, 2, 3 (b) 2, 3, 4 (c) 1, 2, 3, 4 (d) 2, 3

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88 views 1 answer

asked Apr 9, 2018 by anonymous

The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary ...

The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary output voltage will be; (A) 3.6 (B) 2.5 V (C) 3.0 V (D) 6.0 V

Last answer: The primary winding of a 220/6 V, 50 Hz transformer is energised from 110 V, 60 Hz supply. The secondary output voltage will be: 3.0 V

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573 views 1 answer

asked Mar 27, 2018 by anonymous

The low voltage winding of a 400/230 V, 1-phase, 50 Hz transformer is to...

The low voltage winding of a 400/230 V, 1-phase, 50 Hz transformer is to be connected to a 25 Hz, the supply voltage should be

Last answer: The low voltage winding of a 400/230 V, 1-phase, 50 Hz transformer is to be connected to a 25 Hz, the supply voltage should be 115 V.

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206 views 1 answer

asked Mar 20, 2018 by anonymous

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

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

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133 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.

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108 views 1 answer

asked Jan 8 by anonymous

Compare core type transformer and shell type transformer on the following parameters. (i) Types of winding used, (ii) Application

Last answer: Ans:

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5 views 1 answer

asked May 15, 2018 by anonymous

A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary

A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

Last answer: A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is? A.0.2 B.0.4 C.5 D.25

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196 views 1 answer

asked May 15, 2018 by anonymous

If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding,

If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 ohms? A.250 ohms B.25 ohms C.6,250 ohms D.62,500 ohms

Last answer: 6,250 ohms

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318 views 2 answers

asked May 8, 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

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93 views 1 answer

asked Mar 31, 2018 by anonymous

For a 100% efficient transformer, the primary winding has 1000 turns ...

For a 100% efficient transformer, the primary winding has 1000 turns and the secondary 100 turns. If the power input to the above transformer is 1000 watts, the power output is_________.

Last answer: For a 100% efficient transformer, the primary winding has 1000 turns and the secondary 100 turns. If the power input to the above transformer is 1000 watts, the power output is 1000 watts.

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103 views 1 answer

asked Mar 19, 2018 by anonymous

In the transformer which winding has got more cross-sectional area?

Last answer: In the transformer low voltage winding has got more cross-sectional area.

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134 views 1 answer

asked Mar 19, 2018 by anonymous

Which winding of the transformer has less cross-sectional area ?

Last answer: High voltage winding of the transformer has less cross-sectional area.

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57 views 1 answer

asked Sep 30, 2017 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.

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83 views 1 answer

asked May 8, 2018 by anonymous

An Auto-transformer (which has only one winding) may be used as a ______ .

An Auto-transformer (which has only one winding) may be used as a ______ . (A) Both Step-Up and Step-Down transformer (B) Step-Down Transformer (C) Step-Up Transformer (D) None of these

Last answer: an autotransformer may used only as step down transformer

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5.0k views 2 answers

asked Apr 12, 2018 by anonymous

In a fullwave rectifier circuit with centre tap transformer, if voltage between one end of secondary winding...

In a fullwave rectifier circuit with centre tap transformer, if voltage between one end of secondary winding and centre tap is 300V peak, then PIV (peak inverse voltage) is a. 300 V b. 150 V c. 600 V 5 d. 900 V

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131 views 0 answers

asked Apr 11, 2018 by anonymous

If a 220/440 V, 50 Hz, 5 KVA, single-phase transformer operates on 220V, 40Hz supply with secondary winding...

If a 220/440 V, 50 Hz, 5 KVA, single-phase transformer operates on 220V, 40Hz supply with secondary winding open circuited: (A) both the eddy current and the hysteresis losses will decrease (B) both the eddy current and the hysteresis losses will increase (C) eddy current losses will remain the same but the hysteresis losses will increase (D) eddy current losses will increase but the hysteresis losses will remain the same

Last answer: If a 220/440 V, 50 Hz, 5 KVA, single-phase transformer operates on 220V, 40Hz supply with secondary winding open circuited: both the eddy current and the hysteresis losses will decrease

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190 views 1 answer

asked Mar 19, 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.

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63 views 1 answer

asked Mar 19, 2018 by anonymous

Which winding in a transformer has more number of turns ?

Last answer: High voltage winding in a transformer has more number of turns.

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119 views 1 answer

asked Jan 13 by anonymous

Ice glacier’s melting is a common phenomenon linked to the rise in seawater level. The glaciers are predominantly present in (1) Greenland (2) Antarctica (3) Himalayas (4) Arctic

Last answer: Antarctica

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asked Sep 2, 2018 by anonymous

A coil of 500 turns is linked with a flux of 25 mwb, when carries a current of 12.5A. Calculate the value of self-inductance.

Last answer: Ans: Self-Inductance: L = NΦ /I = 500 × 25 × 10-3 / 12.5 = 1 H

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111 views 1 answer

anonymous · Answer 1 · 2017-08-09T12:17:00+0000

answered Aug 9, 2017 by anonymous

Two winding transformer are Inductively linked

jihadio k jeeja · Answer 2 · 2017-12-08T16:57:55+0000

answered Dec 8, 2017 by jihadio k jeeja

Mutual induction

How the two winding transformer is linked ?

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