With the Electrical Interlock (EI kit) installed in a Safety Switch, do the EI contacts OPEN BEFORE the Safety Switch blades open, and CLOSE AFTER the Safety Switch blades close?
Product design features
General Duty, Heavy Duty and Double throw safety switches
Yes, the Electrical Interlock contacts are designed for this sequence of operation.
NOTE: Some customers install the Electrical Interlock in a Safety Switch with the intent of causing downstream contactor contacts to open before the Safety Switch blades open, and close after the Safety Switch blades close. While this can be done in some circumstances, due to variations in size, operating speed, design, and condition of the contactor, we cannot guarantee this sequencing of the Safety Switch blades relative to the contactor contacts.