Mitsubishi Electric Power Products will be featuring tours of its expanded high-voltage factory at the 2008 Finepoint Circuit Breaker Test and Maintenance Training Conference. MEPPI manufactures several transmission and distribution circuit breakers, including dead tank circuit breakers, SFMT series.

Thousands of breakers rated at transmission voltages through 1100kV have been installed and are operating reliably on T&D systems worldwide. Introduced in 1974, the design is based on proven engineering principals and extensive development and testing.

The SFMT features mechanically independent pole-operated, isolated phase dead tanks supported by galvanized steel frames. Each tank houses a single-break puffer interrupter and supports two porcelain or composite bushings.The tanks and bushings are pressurized with SF6 gas.

The frame of each phase also supports the mechanism cabinet. It houses a torsion spring-type operating mechanism and interphase linkages.The control cabinet can be mounted on any phase and houses the control circuits.

The SFMT breaker reflects Mitsubishi Electric's commitment to supply power circuit breakers with extended service lives, that meet or exceed the most demanding specifications for interrupting, insulating, and current-carrying capabilities. The design and performance of all breakers are fully verified in accordance with the procedures of ANSI C 37 and IEC 62271-100, and by Mitsubishi's factory procedures that subject the breakers to conditions that are considerably more comprehensive and severe.

These procedures have confirmed the safety and ruggedness of Mitsubishi breakers. For example, tests confirm Mitsubishi breakers withstand 10,000 mechanical operations and severe seismic forces, and that they operate reliably in extremely low or high temperatures. Users also report extraordinarily low cost of ownership based on exceptional reliability, application flexibility, safety, and ease of maintenance.