This SAE Standard defines the test conditions, procedures, and performance requirements for circuit breakers in ratings up to and including 200 A. The document includes automatic reset, modified reset, and manually reset types of circuit breakers for 12 V and 24 V DC electrical systems. Some circuit breakers may have dual voltage ratings (AC and DC), however, this document evaluates DC performance only.
Rationale
Incorporated requirements of SAE J1625 (Heavy-Duty Circuit Breakers). Changed references that have become obsolete. Clarified use of power supplies vs. batteries, and test condition details. Added monitoring of current during failure (interrupt test) to better capture actual failure mode.
The Truck and Bus Electrical Systems Committee is responsible for initiating, drafting, reviewing, and approving review Standards, Recommended Practices, and Information Reports that pertain to the electrical/electronic power distribution systems, wiring, and other electromechanical [mechatronic] components of trucks, tractor-trailer combinations and ubses over 10,000 lbs. (4500 Kg) GVWR primarily designed for on-highway use, but encompassing limited off-highway operation of vocational vehicles. The Committee reports to the Truck and Bus Electrical/Electronic Steering Committee., standards and information reports concerned with the distribution of electrical energy in trucks, buses, and truck-trailers, including the connections required.
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Circuit Breakers
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