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

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

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 split phase motor, the running winding should have?

Last Answer : In a split phase motor, the running winding should have low resistance and high inductance.

99 views 1 answer

asked Mar 20, 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

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

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

The damping winding in synchronous motor is generally used to?

The damping winding in synchronous motor is generally used to?
Last Answer : The damping winding in synchronous motor is generally used to provide starting torque and prevent hunting.

157 views 1 answer

asked Mar 18, 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

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.

174 views 1 answer

asked Mar 20, 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

State any four characteristics of core type transformer.

State any four characteristics of core type transformer.
Last Answer : Characteristics of core type transformer: i) It has one window. ii) It has one magnetic circuit. iii) Core surrounds the winding. iv) Average length of core is more. v) Area of cross ... Better cooling for winding. vii) Mechnical strength is comparatively less. viii) Repair and maintenance is easy.

132 views 1 answer

asked Jul 27, 2019 by anonymous

Single phase transformer

Single phase transformer
Last Answer : Single phase Transformer Transformer

261 views 1 answer

asked May 16, 2020 by anonymous

With a neat sketch explain working of 1 phase dynamometer type power factor meter.

With a neat sketch explain working of 1 phase dynamometer type power factor meter.
Last Answer : Working of 1 phase dynamometer type power factor meter : The current coil is connected in series with load. Two pressure coils marked as A and B are connected across the supply terminals ... becomes stationary and the pointer shows steady deflection corresponding to the power factor of the load.

201 views 1 answer

asked Sep 6, 2018 by anonymous

Induction type single phase energy meters measure electric energy in?

Last Answer : Induction type single phase energy meters measure electric energy in kWh.

478 views 1 answer

asked Mar 21, 2018 by anonymous

What type of biasing is used in CE amplifier?

72 views 0 answers

asked Mar 22, 2018 by anonymous

Which type of starter is used to start the DC motor?

77 views 0 answers

asked Mar 15, 2018 by anonymous

Which type of motor is used in lift?

Which type of motor is used in lift?
Last Answer : Synchronous motor

77 views 1 answer

asked Mar 11, 2018 by anonymous

What type of meter is used to measure current?

What type of meter is used to measure current?
Last Answer : Ammeter

2.7k views 3 answers

asked Mar 10, 2018 by anonymous

Cylindrical type transformer has:

Cylindrical type transformer has: (A) Single magnetic circuit (B) Double magnetic circuit (C) All of the above (D) None of the above
Last Answer : Cylindrical type transformer has: Single magnetic circuit

121 views 1 answer

asked May 8, 2018 by anonymous

Transformer coupling introduces which type of distortion?

Transformer coupling introduces which type of distortion?
Last Answer : Transformer coupling introduces Cross over distortion.

108 views 1 answer

asked Mar 9, 2018 by anonymous

Which relays are used for phase faults on long line?

Last Answer : Impedance relays are used for phase faults on long line.

82 views 1 answer

asked Mar 20, 2018 by anonymous

What are the five types of single phase motors used in the industry?

79 views 0 answers

asked Mar 15, 2018 by anonymous

Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.

113 views 0 answers

asked Apr 27, 2020 by anonymous

Explain construction and working principle of single phase transformer.

Explain construction and working principle of single phase transformer.
Last Answer : A single phase transformers is an electrical device that accepts single-phase AC power and outputs single-phase AC. PRINCIPLE... The single-phase transformer works on the principle of ... and secondary windings. Thin steel laminations shall be employed to prevent power losses from the core.

1.1k views 4 answers

asked Jul 26, 2019 by anonymous

A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage

A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he
Last Answer : A single phase transformer has resistance and reactance of 0.2 pu and 0.6 pu respectively. Its pu voltage regulation at 0.8 pf lagging would he 0.52

367 views 1 answer

asked May 3, 2018 by anonymous

The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a?

Last Answer : The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.

174 views 1 answer

asked Mar 21, 2018 by anonymous

A phase shifting transformer is used in conjunction with?

Last Answer : A phase shifting transformer is used in conjunction with Drysdale potentiometer.

167 views 1 answer

asked Mar 21, 2018 by anonymous

IDMT relays are used to protect the transformer against :

IDMT relays are used to protect the transformer against : (A) Internal short -circuits (B) Open circuits (C) External short circuits (D) Oil leakage
Last Answer : IDMT relays are used to protect the transformer against : External short circuits

3.1k views 1 answer

asked Apr 30, 2018 by anonymous

The inverse definite mean time relays are used for over current and earth fault protection of transformer against?

Last Answer : The inverse definite mean time relays are used for over current and earth fault protection of transformer against internal short-circuits.

2.6k views 1 answer

asked Mar 20, 2018 by anonymous

Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.

87 views 0 answers

asked Mar 10, 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

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

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

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 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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asked Aug 13, 2019 by Alacrity

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.

256 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.

363 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.

106 views 1 answer

asked Mar 19, 2018 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

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 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

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

anonymous · Answer 1 · 2018-03-19T20:41:43+0000

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

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

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