What will happen to the speed of synchronous machine subjected beyond the pull

What will happen to the speed of synchronous machine
subjected beyond the pull out torque?
Are the behavior shown by rotor remains same for both the
alternator and motor?

Question Posted / iamdon

1 Answers
4167 Views
I also Faced
E-Mail Answers

What will happen to the speed of synchronous machine subjected beyond the pull out torque? Are th..

Answer / iamdon

Beyond pull out torque, the speed of synchronous machine
changes from synchronous speed.This is called LOSS OF
SYNCHRONISM or PULLING OUT OF SPEP.

The behaviour shown by the rotor of synchronous machine in
this condition will NOT REMAIN SAME for alternator and
motor as expalined below.

Motor:An increase in the SHAFT LOAD TORQUE beyond the pull
out torque will cause the rotor to lose synchronism and
thus to SLOW DOWN.

Generator:An increse in PRIME MOVER TORQUE beyond the pull
out torque will cause the rotor to lose synchronism and
thus to SPEED UP.

Author:arbelectbit@yahoo.com

Is This Answer Correct ?

2 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

How to test REF relay testing for LV panel as per Kahramaa standard?

0 Answers

What is the Surge for 1.1 Phase Induction Motor(For Eg.1Hp) 2.3 Phase Induction Motor(For Eg.1Hp) 3.AirConditioner(For Eg 1Ton) 4.Refrigerator(For Eg 180Ltr or 160kW) 5.Induction Cooker 4. Ceiling Fan

0 Answers

Material commonly used in making transformer core is A cast iron B mild steel C high silicom steel D high carbon steel

1 Answers

What is evaporator & condencer & compressor

0 Answers Standard Chartered,

Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?

0 Answers

State kirchoff current law?

0 Answers

A 3 phase motor operating off 415V system is developing 20Kw at an efficiency of 0.77 and power factor of 0.73. determine:- a)the line current. b)the phase current if winding are delta connected. c)the phase voltage if winding are star connected.

1 Answers

What the main causes of transient interruptions on Over-Head Distribution Lines?

0 Answers Orion Laboratories,

what is the maximum genarating in india?

17 Answers

How the real power output is controlled in a Generator?

2 Answers

In power generator sets, when they are coverted from 50hz to 60hz, the kva rating after conversion increases. For example, the manufacturer of a perkins 200kva @ 50Hz generator set has mentioned it to become 220kva after converstion to 60hz. What is the relation between the frequency & the KVA rating. Any formula please.

3 Answers

What is difference between incomer & outgoing type Vaccum Circuit Breaker?

2 Answers VBG,

For more Electrical Engineering Interview Questions Click Here