What is the rating of the number of switching operations of Square D, 400A, Heavy Duty, E-Series Safety Switches? These ratings are also sometimes referred to as Endurance operations and Horsepower-overload operations.

Issue:
Product design feature

Product Line:
Heavy Duty Safety Switches

Environment:
Number of operations

Cause:
Application

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 switching operations for other Heavy Duty Safety Switches:

• For 30-60A series F Heavy Duty safety swtiches, see FA99746
• For 100A series F Heavy Duty safety switches, see FA99790
• For 200A series F Heavy Duty safety switches, see FA99791
• For 600A series E Heavy Duty safety switches, see FA99819
• For 800A series E Heavy Duty safety switches, see FA99821
• For 1200A series E Heavy Duty safety switches, see FA99822

Released for: Schneider Electric USA