Can anyone explain about Control and power circuits of star delta starter & DOL starter ? How it works? please!

Answer Posted / rajendra

DOL- DIRECT ONLINE STARTER
we use one contactor,one thermal o/l relay
in this connection we use the contactors NO contact parallel to contactor coil after stop push button,
when we push start P/B and realease it at this time the NO
contact becames NC and the contactor run continously.

Is This Answer Correct ?    0 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is effect of 5amp fuse on 2mva pry protection of transformer

1368


1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?

2065


Why to keep capacitor bank off while generator running.

1296


what is the IS foe lightning arrester?

1681


hi guys please tell me the procedure for mesuring the coil resistance of 3ph induction motor?

1429






explain the what is a drive ? 0 4 which type motor r use in the celling fan..... PCB plannet 2 13 If stator & rotor of a 3-phase induction motor have different no. of poles, will the motor run or not?? types of drives Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only. ACC 1 41 how the 3phase induction motor is running in 2phase supply with help of capacitor? 1 33 what is the actual difference betwen constructional details and constructional features? 1 20 how does commutator convert a.c to d.c?

4086


pls tell us AC plant are how do work and parts name with picture

1453


what is fault level of power system ?

5096


design of IGBT firing circuit for 11KV

2098


what is the difference between the voltage of 5 volts capacitor and and 5volts battery?

1453


hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar

1541


Can anyone provide with a SLD for HT panel installation for a 33KV line and distribution end has three 1.5MV transformers. Is it suitable to use OCB or VCB and also provide me the suitable rating and its connection diagram.

2888


What is the difference between single core 2 wire and single core 3 wire system? Which application we are using this? and for What purpose we are using this?

1850


Why we use auxillary relay ? what is function of differential relay, directional o/c relay?

1623


What is resonant peak?

683