(1)Auxiliary contacts selection criteria:
How many required in either normally open (NO) or normally closed (NC) format
Possibility of time delayed auxiliary contacts with certain product range
If not used in standard low power signaling application, details as per main poles required
(2)Coil selection criteria :
Voltage of coil (Note: The coil is often a different voltage to the main poles).
AC or DC voltage:
Frequency of coil if AC If DC coil, low consumption is required (available for certain ratings of TeSys D and TeSys K contactors).
Any additional information available should be provided, such as:
1.Is the contactor to be enclosed, i.e. is an enclosed motor starter required?
2.Specific design requirements (e.g. Modular).
3.Number of operations per hour.
4.Latching operation
5.Environmental considerations such as ambient temperature etc.
6.Are any ancillary parts required such as mechanical interlocks, busbars, thermal overload relays or motor protection circuit breakers?
