Answer Posted / amit vishwakarma
Star delta starter used for squirrel cage motor,utilises the principle of reducing the starting voltage.all the six terminals( each of two) of 3 phase induction motor are brought to the starter ......
In fact start delta starter is simply a two way switch. The method is based upon the principle that with 3- winding connect in star, the voltage across each winding is 1/√3..i.e.57.7% of the line to line voltage whereas, the same winding connected in delta will have full line to line voltage across each.
The star delta starter connects three stator winding in star across the rate supply voltage at the starting instant. After the motor attain speed, the same winding through a change over switch are connected in delta across the same supply voltage..
Is This Answer Correct ? | 7 Yes | 1 No |
Post New Answer View All Answers
we have 15 ampere variyac but we want 30 ampere variyac what we do
i had aplied Hindustan Petroleum corporation limited for the post of maintenance technician -Electrical,i want model questions,if anybody have please send it or please advice?
How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?
What is the meaning of 40X8X2 busbar dimensions for carring load of 400 Amps
what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.
how many electricity poles are there and what are the names and their sizes.
some basic standard questions on transformer.
typically in power distribution substation. 1- Any idea how would be the graph of capacitor bank consumption verses time through the day . 2- How is the switching ( on and off ) of the capacitor bank, per need?
and gate circuit diagram,amplifier circuit diagram
how to choose cable size with respect to load? how to convert cable size in mm2 to sq.mm?
Comment on the working principle of operation of a single-phase transformer.
In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring
Ratings of power transformer,Distribution transformer.
Dear all i am kumaravel. now in chennai. my work is control and relay panel auto cad designing.up to 11kv to 400kv then question is i am improving my knowledge. i want some books name and auther are available for this C&R panel related. plese any one help me
Explain what is rated speed?