Westinghouse DS420C 2000A

The Westinghouse DS420C 2000A air circuit breaker is a robust low‑voltage protection device originally manufactured by Westinghouse Electric & Manufacturing Company for industrial, commercial, and utility electrical distribution systems. Engineered on the durable “DS” breaker platform, the DS420C model is designed to deliver reliable performance for circuits requiring high continuous current capacity, dependable fault interruption, and long‑term operational endurance.

Rated for 2000 A continuous current, the Westinghouse DS420C breaker is often installed as a main feeder, branch circuit protector, or distribution panel feeder in systems operating in the 480–600 V AC range (typical low‑voltage distribution class). Its heavy‑duty mechanical construction provides the strength needed to support frequent switching operations and withstand high fault currents typically found in large industrial facilities, manufacturing plants, and commercial power distribution networks.

The Westinghouse DS420C design incorporates a rugged contact and arc‑quenching assembly that safely interrupts fault currents, protecting downstream equipment and minimizing the risk of damage caused by overloads and short circuits. Many DS‑series breakers, including the Westinghouse DS420C were originally supplied in draw‑out or fixed configurations and may be retrofitted with modern electronic trip units offering enhanced protection characteristics such as LSIG (Long‑time, Short‑time, Instantaneous, Ground‑fault) functions for improved coordination and selectivity within complex electrical networks.

Although Westinghouse no longer manufactures new DS‑series breakers, the Westinghouse DS420C remains in service in many legacy installations and is sought after by electrical system maintainers and switchgear refurbishers due to its proven mechanical reliability. Refurbished or reconditioned DS420C breakers are often tested, serviced, and upgraded with current archaeological trip technology to extend the life of existing switchgear while meeting modern protection standards.

Typical applications include:

Industrial plants and manufacturing facilities
Large commercial buildings
Utility distribution and service entrance panels
Motor control centers and feeder circuits
Retrofit and switchgear modernization projects

The Westinghouse DS420C 2000A breaker’s reputation for durability and dependable interruption performance has made it a long‑standing component of legacy and modernized electrical distribution systems.