Answer / kumar

generally in motor the over voltage,over current,over load &
winding damage problems will occur

Answer / sujit ril

Generally in any motor the following types of problems can
occure in Running condition :

under Voltage ( During motor start ),
over load ( If we couple a pump or compressor over rating
than motor so we put more load on motor during running ),
Some time undercurrent may also.

Rest as Mr. kumar said above winding damage also happen but
it is a physical damage.

All motor those being used in field allways being heated by
some auxilary supply voltage to avoid moisture contamination
on motor winding ( not required during running as being
heated by the main supply voltage ). Otherwise in a long
run the moisture can damage the winding insulation and
winding may be short circuited.

Answer / g.n.d.kennedy

I think, my friends are correct. However, the following
problems shall be consolidatively considered which would
occur for motors.

1. OVER VOLTAGE
2. OVER LOAD ( that is over curren resulting over heat}
3. disconnect of either one or two phase in case of 3 pahse
motor
4. Phase sequence reversal
5. Over speed
6. Earth fault

Answer / mahesh

under load vltg,
over load vltg.

Answer / guest

many type like 1

why names such like dog ,rabbit, osprey,ant are used for conductors.

1 Answers  

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what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.

1 Answers   DVC,

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explain the details about vaccum circut breaker and advantages?

4 Answers   CPCL, Unisol,

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when measure the core loss of three phase distribution transformer or three phase reactor loss, one phase shown negative watt loss. why??

1 Answers  

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what is the safety of ACB & VCB and how can this work and how can the service the ACB & VCB parts name with picture

21 Answers   ABB, ACB, Bharti, Claris Lifesciences, Honda, L&T, RotoPower, Sterling Wilson, Wipro,

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how electrical earthing maintenance done in industry?

1 Answers   L&T,

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what happens when back feeding supply accidently collapses with normal supply ??? How?? [that is sometimes in a substation 11kv feeder if their ws long time permit work, back feeding supply will provide from nearest substation... if accidently after the permit work,they charged the feeder without removing back feeding wat will happen...?]

1 Answers   KSEB,

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what does the transformer connection symbol YNaod1 mean ?

3 Answers  

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why there is a high voltage line in multiplication of 11?i.e.- -66kv,11,kv,22kv

4 Answers   Bhel,

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Why the transformers are rated in KVA ? in new view

3 Answers  

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diff b/w normal grounding and resistance grounding

1 Answers  

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Why does a TV set have two pin plug whereas the moniter of a computer has three pin plug? Isn't the earthing protection required for the TV set

2 Answers  

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