S
sheriff78
I have been called out to replace a DOL starter that somebody fitted last year, It controls a 3 phase motor on an extraction unit. The customer has said that the fan used to start slow and then after 10 secounds it would speed up to full speed. The electrician that changed the starter replaced it with a standard DOL starter that just turns over at a slow speed. I have replaced this with a star/delta starter unit. I was hoping to find some spare cables when i opened up the unit but unfortunaley there wasnt any. So now i am puzzelled as to how it could of ever run at 2 speeds. The motor has got a 3 phase isolator mounted next to it that looks original so how could it of been wired up as star/delta if it only has the one set of cables(red,yellow,Blue)
To get the motor working with the new starter am i right in thinking that i will need 2 sets of cables 1 from the main contactor, and one from the the star/delta contactors. and then remove the links from inside the motor panel.
If this is the case will i need to mount a six pole isolator next to the motor or can i just extend the contol circuit through the isolator so that it cuts off the motor(the motor is mounted outside)
Hopefully this makes sense to somebody.
any help on this would be very appreciated
To get the motor working with the new starter am i right in thinking that i will need 2 sets of cables 1 from the main contactor, and one from the the star/delta contactors. and then remove the links from inside the motor panel.
If this is the case will i need to mount a six pole isolator next to the motor or can i just extend the contol circuit through the isolator so that it cuts off the motor(the motor is mounted outside)
Hopefully this makes sense to somebody.
any help on this would be very appreciated