Answer / moti rgpv

1-:STAR -DELTA STARTOR
2-:COUPLING WITH INDUCTION MOTOR AND REMOVE THE MOTOR
AFTER GETING 80% TO 90% OF SYNCHRONOUS SPEED
3-:USING DAMPER BARS

Answer / mallikarjun

At first , the synchronous motor is coupled with induction
motor then the synchronous motor will run as a induction
motor and then the d.c supply is given to the field winding
of the synchronous motor ,the rotor will tends to magentic
locking with stator rotating field then that synchronous
motor wii run at synchronous speed

Answer / satya

using pony motors
using damper windings

Answer / kesavulu

Generally Synchronous motors are not self starting motors.
A pony motor is required to rotate and D.C extitation is
also required.Liquified rotary starters are used

Answer / thiru

BUT IN THE OPTIONS THESE ARE NOT THERE
OPTIONS.
1)DOL 2)AUTO T/F
3)ANY ONE 4)NO ANS

Answer / moti rgpv

DOL is also correct BUT IT IS NOT WIDELY USE FOR LARGE
RATING FOR SYN. MOTOR.
SO IN OPCTION DOL IS WRITE

Answer / viswanadh.m

auto synchronous starter

Answer / guest

3 point stater

Answer / ed

Across the line Starter.
with time delay relay or current sensing relay or
speed monitor relay to
energize the field when the motor is close to
synchronous speed

For above 600 volt motors, a Circuit Breaker can be
used instead of a starter.

Answer / ravi

VFD STARTERS.

What is the role of a Production Engg in a Industry?????

1 Answers  

What is the difference between type1 and type2 relay protection co-ordination for motor feeders

0 Answers   DAE,

how to find under ground cable fault ??? if our cable size is 95*4 then what will load capacity with far mull

2 Answers   Imdad,

what is vA rating and class of a ct.

0 Answers   L&T,

a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn

0 Answers  

Why Trasformers rated in KVA

13 Answers   College School Exams Tests, HAL, Oil and Gas Jobs,

How to select the Cable size for 550 Amps Load without seeing the cable Catalogue?

8 Answers   Nesma,

As we use capacitior bank in 3ph ckt for improvement of PF, why not we use capacitor in single phase domestric use, at our house their are many inductive equipments,like fan,mixer,tube choke,air conditioner they also draw PF... by using capacitor can they improve PF. if yes--what are advantage and how to connect a capactor in single ph,and which type of capacitor if no- what are disadvantages.

0 Answers  

what is the effect if we add capacitor on DG supply, it has any loss or benefit.

6 Answers  

I have cleared IOCL written exam(Electrical). My intv is on 6/9/2008.can anyone guide me & tellme abt intv questions.

5 Answers   IOCL,

what is the need of representing AC power in sinusoidal waveform? why not in square or rectangular etc...

8 Answers   Lanco,

an off load but energized 11/0.4 KV, 1250 KVA T/F has a power factor of 0.65(capacitive)..!! why is it so, though T/F being an inductive device ??

4 Answers