Asea Brown Boveri

ABB ( is a leader in power and automation technologies that enable utility and industry customers to improve performance while lowering environmental impact. The ABB Group of companies operates in around 100 countries and employs about 145,000 people.

Product Lines

Electric Motors, Geared Motors, Miniature Circuit Breaker, Standard Control Components, Medium & High Voltage Switch Gears, Power Fuses, Transformer, Explosion Proof Luminaires, Power Capacitor.

Type PM, 550 kV, up to 63 kA Power Circuit Breaker

The 550PM breaker includes three interrupter tanks comprised of cast aluminum and/or steel sections. Each factory completed tank assembly incorporates two (or three) serially connected puffer interrupters, a spring-hydraulic operating mechanism, an enclosure with pre-wired externally removable CT's, and a CT terminal block cabinet. During field erection, the pole units are mounted on separate galvanized steel support structures, and the bushings are assembled to each tank. A free-standing powdercoated steel control cabinet, housing the electrical control accessories, completes the arrangement.

Line Entrance Module, LEM

A standard Line Entrance Module (LEM) can be equipped with the follwing high voltage eqipment:

  • CPB Capacitor voltage transformer
  • NVA grounding switch
  • PEXLIM surge arrester

A complete three-phase unit Line Entrance Module, including CVTs, grounding switch and surge arresters has been tested.