{}

Our Brands

Impact-Company-Logo-English Black-01-177x54

Schneider Electric USA Website

Welcome to our website.

How can we help you today?

What is the rating of the number of switching operations of Square D, 400 A, general duty, E-Series safety switches?

Issue:
Product Design Features

Product Line:
General Duty Safety Switches

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.
Endurance Test Numbers of OpsHP Test Number of Ops
Test StandardsRated Load*No LoadTotal (L+NL)At Rated HP**
UL10005000600010
NEMA10005000600010
Square D10005000600010
* endurance test done at switch rated Load current
** horsepower test - make/break motor inrush/locked rotor current at rated HP

Schneider Electric USA

Explore more
Range:
Users group

Discuss this topic with experts

Visit our Community for first-hand insights from experts and peers on this topic and more.
Explore more
Range: