What is the rating of the number of switching operations of Square D, 30 - 60A, General Duty, E-Series Safety Switches? These ratings are also sometimes referred to as Endurance operations and Horsepower-overload operations.

Issue:
Application

Product Line:
GD Safety Switch

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. (see below table):

NUMBER OF OPERATIONS Square D Safety Switches 30 - 60A, General Duty (E-series):

Endurance test number of operations: test standards rated Load* No-Load total (L + NL) UL 6000 4000 10000  * endurance test done at switch rated Load current

HP test number of operations: at rated HP** 50 ** horsepower test - make/break motor inrush/locked rotor current at rated HP

 

Number of switching operations for other General Duty safety switches: For 30-60A series F General Duty safety switches, see FA99707 For 100A series F General Duty safety switches, see FA99734 For 200A series F General Duty safety switches, see FA99735 For 400A series E General Duty safety switches, see FA99736 For 600A series E General Duty safety switches, see FA99737 For 800A series E General Duty safety switches, see FA99761