Circuit Breaker Interrupting Rating on Griffin and Lafayette-Packaged Engine Generator Sets Caterpillar

Circuit Breaker Interrupting Rating on Griffin and Lafayette-Packaged Engine Generator Sets

Usage:

Circuit Breaker Interrupting Rating on Griffin and Lafayette-Packaged Engine Generator Sets

CONFIDENTIAL TIBU4513-00

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TECHNICAL INFORMATION BULLETIN	April 13, 2005
Engines	3500 Gas & Diesel
	Component Code(s) 1420

SUBJECT: Circuit Breaker Interrupting Rating on Griffin and Lafayette-Packaged Engine Generator Sets

PROBLEM:

The interrupting current rating for new, R-Series, UL-IEC/CSA circuit breakers is 35,000 Amps at 480 Volts, 60 Hertz (as noted in publication LEHE4891, which was referenced in the October 2004 Product News). The predecessor CM-Series circuit breakers had an interrupting current rating of 85,000 Amps at 480 Volts, 60 Hertz.

SOLUTION:

Determining the necessary interrupting current rating for a specific installation requires a fault current analysis. Assure all project documentation and the selected circuit breakers reflect the proper interrupting current rating. If installations require a new R-Series circuit breaker with an interrupting current rating greater than 35,000 Amps, contact the Application Support Center for assistance.

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ALL RIGHTS RESERVED

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