Star Delta Timer+Mains Control

A- SDT-M

0 - 30 seconds. Other times on request. 

Operation as per the normal SDT, but with the extra feature of 2 separate instantaneous change-over contacts. These contacts operate 40mS after the star contact closes. A green LED confirms the operation of these contacts. This feature offers the option of the “Star contactor” closing first followed by the “main contactor.” The second spare set of contacts can be used as a starter holding or interlocking contact. This may dispense with contacts on the star & main contactor, etc.