Answer / k.prakashchandra

rheostat

Answer / karthik_elec

in this method which is suitable for sepr excited and
shunt, compound motors,in this type speed can regulate by
inserting a variable resistence in the field circuit. speed
is inversily proposional to the field current, in order t
reduce the field current by using the resistor(rheostat)
we can reduce the speed,in this method we can achive minute
speed control, this speed control not affected by the load
means it can be perfoemed by light loads also, disadvantage
is we control the speed very limit range only 1:4

Answer / kvv.surendra

Its is by armature control for below rated and field control for above rated speeds

Answer / harini

if it is separetly field exited machine means will connect
the one rheostat in series with the field.

types of central Air conditioner plant?

0 Answers  

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why does spark appears when we swith on the light

1 Answers  

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n1 =1000 n2 =?;v1 =200:v2 =400

1 Answers   APGenco,

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What is Auto Mains Failure Panel & Auto Synchronizing Panel

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defination of static variable compensator

1 Answers  

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase, before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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1600 KVA ka transformer hi aghar lt side par 800A aur voltage 420 ho to HT side ki cable ki rating keya ho gi?

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How stabilizer works??

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What will happen if we give transformer a dc not ac

5 Answers  

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what will happen if secondary of potential transformer (220kv/110volt) of any metering core or protection core (cables) of any phase got earthed??

1 Answers  

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What happen Grid EARTH plat got cut.

0 Answers   Zuari,

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3phase motor can be used as a Prime mover for alternator.

0 Answers  

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