Answer / parag bijlani

In star-delta starter, motor starts in star, and after a
time delay ,it switches to delta connections. The star
current is 1/1.732 (square root of 3).

Answer / amit kumar singh

in delta conection motor is direct on line current is
controled by relay in curcuit starting current high so used
high tourq motor as conveyr belt drive,water pump.use for
low hp motor.
in star delta conection current is redused 1/square root of
three, havey hp motor for protection heating low current is
requrid so we use star delta starter. its used for high hp
motor.
component in delta- one contactor,fuse,pushbutoon off-
on,field coil,overload relay.
component in star-3 contactor,fuse,pushbutoon, under
voltage coil,overload relay

why do we have 230v a.c. as general voltage for domestic supply rather than others?

2 Answers  

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What do you mean by Transformer?

9 Answers   Hyundai, NTPC, wbsedcl,

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In a generator (Synchronous) does the rotor speed (frequency) corresponds to the speed of the water (in hydro). does the torque on the turbine relate to the flow of water?

2 Answers  

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what is mean by xlpe swa pvc

5 Answers  

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0 Answers   ABC,

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1 Answers  

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2 Answers  

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Hi frnds :) plz tell me that i have 100 KVA 3 phase generator so by thumb rule 100*1.4 = 144 amps and generaly we can operate at 80% load...so it will 144*0.8 =112 amps.... so now i m confused about single phase load.....if we use that generator only for single phase the that 112 amps is total single phase load or i can give 112 amps at red 112 amps at yellow and 112 amps at blue.... i mean that total single phase load that 100 KVA generator will take is 112+112+112=336 amp ??

2 Answers   FWO,

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which one has maximum efficiency autotransformer or transformer?? and why??

2 Answers  

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List examples of current sources?

0 Answers  

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what are the stresses in circuit breakers ?

0 Answers  

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