High Voltage Gas Circuit Breakers

Thousands of breakers rated at transmission voltages through 1100kV have been installed and are operating reliably on T&D systems worldwide. Introduced in 1968, 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. At the voltage levels below 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. The 200-SFMT ratings and above utilise Mitsubishi Electric’s highly reliable, zero maintenance,¬†torsion spring-type operating mechanism and interphase linkages. The control cabinet can be mounted on any phase and houses the control circuits.

Our product range:

RATING TYPE
123kV 100SFMT40E 100SFMT63F
100SFMT63F
100SFMT-40SE
145kV 120-SFMT-40E 120SFMT40E
120-SFMT-40SE
120SFMT-50/63F
170kV 140SFMT-50/63F  140-SFMT-50-63F
245kV 200-SFMT-40E 200SFMT63F
200-SFMT-40SE
200-SFMT-50SE
200-SFMT-50F
200-SFMT-63F
362kV 300-SFMT-40E 300SFMT40E
300-SFMT-50E
420kV 400-SFMT-63F 400-SFMT-63F W
550kV 500-SFMT-50E 500SFMT63E
500-SFMT-63E