x

Recent tagged pole


Pole Climbing & Attention to Street Light, Jumpers & Insulator Checking & Replacement of Insulator?
Last Answer : Ans. (a) Before pole climbing, supply to be disconnected (b) While climbing safety belt, helmet to be used. (c) While attending street light, safety board to be displayed. (d) While providing jumpers ... non-essential (g) Essential loads to be brought to single point. (h) Then connect UPS supply.

Show More

7 views 1 answer



How to Rig a Fishing Pole
Last Answer : How to Rig a Fishing Pole Fishing can be a really exciting outdoor experience, not just a nap in the middle of a lake while holding a complicated stick. Rigging a fishing pole ... these steps, you can prepare your fishing equipment properly for a weekend afternoon of recreation and relaxation.

Show More

11 views 1 answer



How to Build a Pole Barn ?
Last Answer : How to Build a Pole Barn How to Build a Pole Barn One of the simplest installations that you can make in your property is a pole barn. Usually found on agricultural land, a pole barn ... . Pond construction is also helpful if you want to add some extra features for your small household farm.

Show More

5 views 1 answer



With a neat sketch give the working of shaded pole induction motor.
Last Answer : Explanation: It has squirrel cage rotor and salient pole stator. The stator poles are shaded partially by short circuited conductor band to create the phase difference between the fluxes emerging from shaded ... rotating magnetic field in the air-gap and torque is exerted on the squirrel cage rotor.

Show More

269 views 2 answers



State two applications of 1) Shaded pole motor 2) Universal motor
Last Answer : (i)Applications of Shaded pole motor: 1. Small fans 2. Toy motors 3. Hair dryers 4. Ventilators 5. Electric clocks 6. Record players 7. Motorized valves 8. Gramophones 9. Photocopying ... 5. Portable Drilling Machines 6. Electric Shavers 7. Mechanical computing Machines 8. Machine Tools etc.

Show More

125 views 1 answer



A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is
Last Answer : A 50 Hz, 4 pole turboalternator rated at 20 MVA. 13.2 KV has an inertia constant H = 4 KW sec/KVA. The K.E. stored in the rotor at synchronous speed is 80 MJ

Show More

1.6k views 1 answer



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

Show More

196 views 1 answer




Last Answer : Locked rotor current of a shaded pole motor is slightly more than full load current.

Show More

85 views 1 answer




Last Answer : The shaded pole motor is used for low starting torque.

Show More

63 views 1 answer




Last Answer : In case of a shaded pole motor the direction of rotation of the motor is from main pole to shaded pole.

Show More

340 views 1 answer




Last Answer : A shaded pole motor can be used for toys, hair dryers, circulators etc.

Show More

103 views 1 answer




Last Answer : The range of efficiency for shaded pole motors is 5% to 35%.

Show More

120 views 1 answer




Last Answer : In a shaded pole single-phase motor, the revolving field is produced by the use of shading coils.

Show More

207 views 1 answer




Last Answer : In a shaded pole motor, the shading coil usually consist of a single turn of heavy copper wire which is short-circuited and carries only induced current.

Show More

132 views 1 answer




Last Answer : If the field winding of an unloaded salient pole synchronous motor is open circuited, the motor will stop.

Show More

258 views 1 answer




Last Answer : The torque produced in induction type relay (shaded pole structure) is inversely proportional to the square of the current.

Show More

835 views 1 answer



Salient pole rotor is use for which speed?
Last Answer : Salient pole rotor is use for low and medium speed prime movers.

Show More

100 views 1 answer



what will happen when excitation of an unloaded salient pole synchronous motor suddenly gets disconnected?
Last Answer : When excitation of an unloaded salient pole synchronous motor suddenly gets disconnected the motor will stop.

Show More

372 views 1 answer



Explain MOSFET gate drive circuit and totem pole configuration.
Last Answer : MOSFET gate drive circuit: The turning on and turning off of MOSFET can be controlled from gate to source voltage signal. If the gate to source voltage of MOSFET exceeds threshold ... this configuration, the two switches (transistors) are used in totem pole arrangement with a comparator.

Show More

349 views 1 answer