What is the rating of the number of switching operations of 600 A, heavy duty, E-Series safety switches?

Issue:
Application

Product Line:
HD Safety Switch

Resolution:
For safety switches, the standard for design and testing of the number of switching operations is governed by UL98 and NEMA KS-1.There are two separate tests: (1) endurance test, and (2) horsepower-overload test. The below table shows the minimum number of operations required (OFF to ON to OFF) by UL and NEMA, as well as the number of operations required by Square D.

NUMBER OF OPERATIONS
Square D safety switches (E-series)
600 A, heavy duty

Endurance Test Ops				HP Test Ops
Test Stds	Rated Load*	No Load	Total (L+NL)	At Rated HP**
UL	1000	4000	5000	10
NEMA	1200	4800	6000	10
Square D	1200	4800	6000	10

* endurance test done at switch rated Load current
** horsepower test - make/break motor inrush/locked rotor current at rated HP

Released for:Schneider Electric USA