Wye-Delta Starter
Wye-Delta Starter
(OP)
I need to supply wye-delta motor starters for equipment going to Europe. I was shocked by the pricing I received on the units. I thought these where not much more than a standard motor starter with an additional contactor and some timing hardware. Can these be made from individual components?





RE: Wye-Delta Starter
Maybe you should check that you are comparing like with like. Does the starter you've been quoted a price on have extra protective relays (underload as well as overload, electronic protection, motor seal leak or oil in water detection, etc)? Will it be constructed to the same standards as the DOL starter you're comparing with (panel construction and compartment segregation, Ex-rated, some kind of additional mechanical interlocking mechanism between the two contactors)? Does it have extra controls (lamps, pushbuttons, remote comms)?
Maybe the price hike is partly because of the extra cabling requirements to the motor (6 cores instead of 3)?
Can't think of any other possibilities at the moment.... have you gone to more than one manufacturer for a quotation?
RE: Wye-Delta Starter
Thanks for the feedback.
RE: Wye-Delta Starter
http://www.squared.com
RE: Wye-Delta Starter
- these are known as wye-delta (y-delta) based on the order of operations (wye start, delta run)
- minimum of three contactors required (open transition starter): main, start, and run. Four starters are used for a closed transition starter. They clearly show three contactors for the open transition model, 1M, 1S, and 2M. These would be known as main, start, and run respectively. The closed transition model has a fourth contactor 2S.