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GL 313
Live tank circuit breakers from 145 kV up to 170 kV
Reliable Performance in Low Temperatures

GE’s GL 313 live tank circuit breaker for outdoor installation is designed for temperatures down to -55°C with gas mixture and -40°C with pure SF6, and feature the latest technologies in interrupter chambers and spring-operated mechanisms. Our latest double motion technology effectively reduces the opening energy by approximately 65%. The GL 313 live tank circuit breaker provides a high level of reliability, even under extreme conditions and climates, or in highly active seismic areas.

The GL 313 circuit breaker is preset and pre-filled with SF6 at the factory before shipping. Due to this preassembly, no adjustments are necessary during installation and commissioning of the circuit breaker which allows for quick and easy installation on site with long intervals between maintenance.

GE Advantage

High Quality Components

The GL 313 live tank circuit breaker provides high reliability based in part on high quality components, including:

  • Interrupter chamber with integral double motion technology and self-blast system
  • Pressure relief system for passive protection of both substation and personnel
  • Field-proven, temperature-compensated density monitor with two-stage transducer and three-color dial
  • Easy access to the SF6 filling connection (type DILO)
  • SF6 non-return (check) valve on each pole column
  • Protected opening springs inside each pole column
  • Hot-dip galvanized steel parts
  • Mechanism housing made completely of aluminum
  • Reliable spring-operated mechanism with position indicator clearly visible from outside

Installation and Maintenance

  • Preset at factory before shipping; no adjustments necessary during installation and commissioning
  • Pole units pre-filled with SF6 at factory before shipping
  • Independent disassembly of the interrupter chamber without having to remove the entire pole column


Our live tank circuit breakers meet the requirements of national and international standards. This has been confirmed by comprehensive type tests according to the latest IEC and ANSI standards.


The entire development and production procedures for our live tank circuit breakers are fully compliant with the latest ISO 9001 ISO 14001 and OHSAS 18001 quality standards. This ensures the high quality of our products and services, which is confirmed by regular audits.


Breaker type GL 313 F1/4031 P / GL 313 F3/4031 P
Rated voltage                                 170 kV
Rated frequency  50/60 Hz
Rated normal current  up to 3,150 A
Rated short circuit breaking current  up to 40 kA
Rated short circuit making current  104 kA
Rated duration of short circuit 3 s
Opening time                 28 ms
Break time  50 ms
Closing time            ≤70 ms
Average ambient temperature * -30 °C up to +40 °C
Design altitude * *1,000 m.a.s.l.
* Standard values according to IEC; temperatures down to -55 °C up to +70 °C and/or higher design altitudes available on request.


Circuit Breaker drawing