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GL 314 / GL 314X
Live tank circuit breaker for 245 / 300 kV
Highly Reliable Performance

GE’s GL 314 and GL 314X live tank circuit breakers for outdoor installation feature third generation self-blast interrupter chambers and spring-operated mechanisms (FK). These field–proven interrupter chambers operate on the energy optimized self-blast principle. The FK3 type mechanisms equip the entire range of circuit breakers with more than 180,000 references worldwide.

The GL 314 and GL 314X are field-proven and time-tested in high voltage switchgear, providing high mechanical endurance and very low restrike probability according to IEC 622271-100 class M2 & C2. GE’s live tank circuit breakers provide a high level of reliability, even under extreme conditions and climates, or in highly active seismic areas. The circuit breakers are completely assembled before delivery, allowing for quick, easy installation and commissioning with long intervals between maintenance.

GE Advantage

Customer Benefits

The GL 314 and GL 314X live tank circuit breaker provides high reliability based in part on high quality components, including:

  • Single pole or three pole operating design
  • Self-blast interrupter chambers
  • Spring mechanism FK3 equipped with a position indicator visible from the outside
  • Field-proven, temperature-compensated density monitor with two-stage transducer and three-color dial
  • Easy access to the SF6 filling connection (type DILO)
  • Sealings suitable for temperatures down to -60 °C
  • Hot-dip galvanized steel parts and mechanism housing made completely of aluminum

Optional Components

  • Standard low voltage equipment provided, additional equipment is available
  • Composite insulators are available
  • Seismic dampers for high seismic request can be provided
  • Pressure relief system for passive protection of both substation and personnel
  • RPH3 controller: Pont-on-wave tripping and closing relays
  • CBWatch: compact and modular circuit breaker monitoring solution

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
  • Disassembly of interrupter chamber without removal of entire pole column possible

Advanced Testing

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.

Certified Quality

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 314 GL 314X
Number of breaks / phase   1 1
Rated normal voltage kV 245 / 252 245 300
Rated normal current A 4,400 4,000
Rated frequency Hz 50 60 50 50
Rated dielectric withstand (up to 1,000 m)* (to earth / occross open device)
- At power frequency
- At lightning impulse (1.2 / 50 µs wave)
- At switching impulse

kV (peak)
kV (peak)

1,050/ 1,200

1,050/ 1,200

1,050/ 1,050(+170)
850/700 (+245)
Roted short-circuit breaking capacity
- Periodic component (r.m.s. value)
kA 50 40 63 50
First pole-to-clear factor   1.3 1.5 1.3 1.3
Peak short-circuit withstand current kA (peak) 137 110 173 137
Roted line-charging capac itive switching   Class C2 Class C2
Mechanical endurance   Class M 2 Class M2
Breaking time cycles 2 - 2.3 2 - 2.3
* For other values, please contact us.