WAT IS MEANT BY COLD AND HOT START OF A MOTOR?? HOW DOES IT
AFFECT A MOTOR'S PERFORMANCE??

Answer Posted / avd

Cold start : Starting the motor when it is cold. Means when
motor stoped and starts after long delay, considered as
cold start. Techanically if motor thermal containt is less
than 50%, it is considered cold.

Hot start : When motor is hot and you give start. Means
stoping the motor and immediately restarting is hot
start.Techanically if the motor thermal containt is more
than 50% and a start is given to motor, it is a hot start.

Effect : Any start of motor will result in increase of
thermal containt. If motor is hot (hot start given) than
motor thermal containt further increase hence there will be
detorioration in the insulation and thus life of motor.

Is This Answer Correct ?    72 Yes 6 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is the voltage between earth to neutral in lift.

1349


what is the use of the circle diagram

4533


why the colour of insultor stack , petticoat is brown. Is it has some technical reason.

1576


which is the most advanced form of SF6 BREAKER?Can we use other gases to quench the arc?

1574


How much of the total hydro power potential has been exploited so far in india?

632






Why is the frequency not changed during transformation of electrical energy in a transformer?

850


In MEP Services what are parts of STP and what are there function?

2943


I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

1374


How we select the vector group of 3phase power transformer?

1988


how to test the electrical panel.ht lt mcc pcc.

3219


In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

1998


when generator short circuit condition, the current how dissipates. or at short circuit voltage not available then current how can flow?

1757


What is the application of Dyn1 and Dyn11 vector group of transformer?

2433


what is the maximum temperature rating of a thhn insulated conductor?

1362


How to Calculate KA Rating of Main LT Panel

1183