Romeo Member R Join Date Mar 2014 Location Mumbai Posts 5 Mar 14, 2014 #1 what should be the contactor current rating in star delta starter of star, delta, and main contactor.
what should be the contactor current rating in star delta starter of star, delta, and main contactor.
OZEE Member O Join Date Mar 2006 Location Kansas Posts 1,694 Mar 14, 2014 #2 Depends on the load of the driven motor, doesn't it...
Kidblue Lifetime Supporting Member Join Date May 2003 Location Worcester Posts 698 Mar 14, 2014 #3 Hi, Your question is a little vague, but typically, you can de-rate the contactors and overload by 58% of the full load current. Regards, Rob
Hi, Your question is a little vague, but typically, you can de-rate the contactors and overload by 58% of the full load current. Regards, Rob
Geospark Lifetime Supporting Member Join Date Feb 2012 Location Kildare Posts 3,010 Mar 14, 2014 #4 Hi and welcome to the Forum! Here is a good explaination of reduced voltage star/delta starting for induction motors and the current derating figures for the contactors. George
Hi and welcome to the Forum! Here is a good explaination of reduced voltage star/delta starting for induction motors and the current derating figures for the contactors. George
Romeo Member OP R Join Date Mar 2014 Location Mumbai Posts 5 Mar 14, 2014 #5 thank you all for your suggestions. the motor is of 20HP