GL 318 / GL 318X
Live tank circuit breaker up to 800 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 318 and GL 318X 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.
GL 318 / GL 318X
Live tank circuit breaker up to 800 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 318 and GL 318X 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.
High Quality Components
The GL 318 and GL 318X live tank circuit breakers provide high reliability based in part on high quality components, including:
- Single pole operating design
- Four self-blast Interrupter chambers and two spring mechanisms per pole
- Spring mechanism FK3 equipped with a position indicator visible from 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 housings made completely of aluminum
Flexible Options
- 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
- Closing resistors solutions (CL 315D) to limit high and damaging overvoltages
Installation and Maintenance
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Disassembly of interrupter chamber without removal of entire pole column possible
Advanced Testing
The 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 standards.
Certified Quality
GE Vernova’s quality (ISO 9001:2008), environmental (ISO 14001:2004) and occupational health and safety (OHSAS 18001:2007) management systems determine the development and production procedures for the high voltage circuit breakers. These systems ensure the high quality of the products and services, which are confirmed by regular audits.
Specifications
Breaker Type | GL 318 / GL 318D | GL 318X / GL 318XD | ||
---|---|---|---|---|
Number of breaks / phase | 4 | 4 | ||
Rated normal voltage | kV | 800 | 800 | |
Rated normal current* | A | 4,000 | 5,500 | |
Rated frequency | Hz | 50/60 | 50 | |
Rated dielectric withstand (up to 1,000 m)* (to earth / accross open device) | ||||
- At power frequency | kV | 830/1,150 | 830/1,150 | |
- At lightning impulse (1.2 / 50 µs wave) | kV (peak) | 2,100/2,100 (+455) | 2,100/2,100 (+455) | |
- At switching impulse | kV (peak) | 1,550/1,175 (+650) | 1,550/1,175 (+650) | |
Rated short-circuit breaking capacity | ||||
-Periodic component (r.m.s. value) | kA | 50 | 63 | |
First pole-to-clear factor | 1.3 | 1.3 | ||
Peak short-circuit withstand current | kA (peak) | 137 | 173 | |
Rated line-charging capacitive switching | Class C2 | Class C2 | ||
Mechanical endurance | Class M2 | Class M2 | ||
Breaking time | cycles | 2 - 2,3 | 2 - 2,3 | |
* For other values, please contact Grid Solutions. |
Drawings

Recommended Products & services
GL 317 / GL 317X
Live tank circuit breaker up to 550 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 317 and GL 317X 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.
GL 317 / GL 317X
Live tank circuit breaker up to 550 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 317 and GL 317X 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.
High Quality Components
The GL 317 and GL 317X live tank circuit breakers provide high reliability based in part on high quality components, including:
- Single pole operating design
- Two self-blast Interrupter chambers per pole
- Spring mechanism FK3 equipped with a position indicator visible from 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 housings made completely of aluminum
Flexible Options
- 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
- Closing resistors solutions (CL 315D) to limit high and damaging overvoltages
Installation and Maintenance
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Disassembly of interrupter chamber without removal of entire pole column possible
Advanced Testing
The 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 standards.
Certified Quality
GE Vernova’s quality (ISO 9001:2008), environmental (ISO 14001:2004) and occupational health and safety (OHSAS 18001:2007) management systems determine the development and production procedures for the high voltage circuit breakers. These systems ensure the high quality of the products and services, which are confirmed by regular audits.
Specifications
Breaker Type | GL 317 / GL 317D | GL 317X / GL 317XD | ||
---|---|---|---|---|
Number of breaks / phase | 2 | 2 | ||
Rated normal voltage | kV | 550 | 550 | |
Rated normal current | A | 4,000 | 5,500 | |
Rated frequency | Hz | 50/60 | 50 | |
Rated dielectric withstand (up to 1,000 m)* (to earth / accross open device) | ||||
- At power frequency | kV | 620/800 | 620/800 | |
- At lightning impulse (1.2 / 50 µs wave) | kV (peak) | 1,550/1,550 (+315) | 1,550/1,550 (+315) | |
- At switching impulse | kV (peak) | 1,175/900 (+450) | 1,175/900 (+450) | |
Rated short-circuit breaking capacity | ||||
-Periodic component (r.m.s. value) | kA | 50 | 63 | |
First pole-to-clear factor | 1.3 | 1.3 | ||
Peak short-circuit withstand current | kA (peak) | 137 | 173 | |
Rated line-charging capacitive switching | Class C2 | Class C2 | ||
Mechanical endurance | Class M2 | Class M2 | ||
Breaking time | cycles | 2 - 2,3 | 2 - 2,3 | |
* For other value, please contact Grid Solutions. Grading capacitors should be removed depending on required performances. |
Drawings

Recommended Products & services
GL 316 / GL 316X
Live tank circuit breakers up to 420 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 316 and GL 316X 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.
GL 316 / GL 316X
Live tank circuit breakers up to 420 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 316 and GL 316X 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.
High Quality Components
The GL 316 and GL 316X live tank circuit breakers provide high reliability based in part on high quality components, including:
- Single pole operating design
- Two self-blast Interrupter chambers per pole
- Spring mechanism FK3 equipped with a position indicator visible from 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 housings made completely of aluminum
Flexible Options
- 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
- Closing resistors solutions (CL 315D) to limit high and damaging overvoltages
- Grading capacitors depending on specifications
Installation and Maintenance
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Disassembly of interrupter chamber without removal of entire pole column possible
Advanced Testing
The 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 standards.
Certified Quality
GE Vernova's quality (ISO 9001:2008), environmental (ISO 14001:2004) and occupational health and safety (OHSAS 18001:2007) management systems determine the development and production procedures for the high voltage circuit breakers. These systems ensure the high quality of the products and services, which are confirmed by regular audits.
Specifications
Breaker Type | GL 316 / GL 316D | GL 316X / GL 316XD | |
Number of breaks / phase | 2 | 2 | |
Rated normal voltage | kV | 420 | 420 |
Rated normal current | A | 4,000 | 5,500 |
Rated frequency | Hz | 50/60 | 50 |
Rated dielectric withstand (up to 1,000 m)* (to earth / accross open device) - At power frequency - At lightning impulse (1.2 / 50 µs wave) - At switching impulse | kV kV (peak) kV (peak) | 520/700 1,425/1,425 (+240) 1,050/900 (+345) | 520/700 1,425/1,425 (+240) 1,050/900 (+345) |
Rated short-circuit breaking capacity -Periodic component (r.m.s. value) | kA | 50 | 63 |
First pole-to-clear factor | 1.3 | 1.3 | |
Peak short-circuit withstand current | kA (peak) | 137 | 173 |
Rated line-charging capacitive switching | Class C2 | Class C2 | |
Mechanical endurance | Class M2 | Class M2 | |
Breaking time | cycles | 2 - 2,3 | 2 - 2,3 |
* For other values, please contact Grid Solutions. |
Drawings

Recommended Products & services
GL 315 / GL 315X
Live tank circuit breaker for 362 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 315 and GL 315X 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.
GL 315 / GL 315X
Live tank circuit breaker for 362 kV
Reliable, Economical and Easy-to-Use
GE Vernova’s GL 315 and GL 315X 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.
Flexible Options
- 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
- Closing resistors solutions (CL 315D) to limit high and damaging overvoltages
Installation and Maintenance
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Disassembly of interrupter chamber without removal of entire pole column possible
Advanced Testing
The 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 standards.
Certified Quality
GE Vernova's quality (ISO 9001:2008), environmental (ISO 14001:2004) and occupational health and safety (OHSAS 18001:2007) management systems determine the development and production procedures for the high voltage circuit breakers. These systems ensure the high quality of the products and services, which are confirmed by regular audits.
Specifications
Breaker Type | GL 315 / GL 3150 | GL 315X / GL 315XD | |
Number of breaks / phase | 2 | 2 | |
Rated normal voltage | kV | 362 | 362 |
Rated normal current | A | 4,000 | 5,500 |
Rated frequency | Hz | 50/60 | 50 |
Rated dielectric withstand (up to 1,000 m)* (to earth / accross open device) - At power frequency - At lightning impulse (1.2 / 50 µs wave) - At switching impulse | kV kV (peak) kV (peak) | 450/520 1,175/1,175(+205) 950/800(+295) | 450/520 1,175/1,175(+205) 950/800(+295) |
Rated short-circuit breaking capacity -Periodic component (r.m.s. value) | kA | 50 | 63 |
First pole-to-clear factor | 1.5 | 1.5 | |
Peak short-circuit withstand current | kA (peak) | 137 | 173 |
Rated line-charging capacitive switching | Class C2 | Class C2 | |
Mechanical endurance | Class M2 | Class M2 | |
Breaking time | cycles | 2 - 2,3 | 2 - 2.3 |
* For other values, please contact us. |
Drawings

Recommended Products & services
GL 314 BPS
Live tank by-pass switch for series capacitor bank applications
Fast Closing By-Pass Switch
GE Vernova’s GL 314 By-Pass Switch (BPS) is designed to close very fast and protect series capacitor banks in case of a fault in the overhead lines. It is equipped with excelled live tank circuit breaker technology such as the third-generation self-blast interrupter chambers and spring-operated mechanisms (FK). These field–proven interrupter chambers operate on the optimized self-blast principle. The FK3 type mechanisms equip the entire range of circuit breakers with more than 180,000 references worldwide.
GL 314 BPS
Live tank by-pass switch for series capacitor bank applications
Fast Closing By-Pass Switch
GE Vernova’s GL 314 By-Pass Switch (BPS) is designed to close very fast and protect series capacitor banks in case of a fault in the overhead lines. It is equipped with excelled live tank circuit breaker technology such as the third-generation self-blast interrupter chambers and spring-operated mechanisms (FK). These field–proven interrupter chambers operate on the optimized self-blast principle. The FK3 type mechanisms equip the entire range of circuit breakers with more than 180,000 references worldwide.
High Quality Components
The GL 314 BPS live tank circuit breaker provides high reliability based in part on high quality components, including:
- Three pole operating design
- One self-blast interrupting unit with guard rings at upper and lower positions
- Supporting column is composed of two to four insulators (depending on the voltage to ground/earth)
- 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 -50 °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
- CBWatch: compact and modular circuit breaker monitoring solution
Installation and Maintenance
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Disassembly of interrupter chamber without removal of entire pole column possible
Advanced Testing
The by-pass switch meets the requirements of national and international standards. This has been confirmed by comprehensive type tests according to the latest versions of IEC standards.
Certified Quality
GE Vernova's quality (ISO 9001:2008), environmental (ISO 14001:2004) and occupational health and safety (OHSAS 18001:2007) management systems determine the development and production procedures for the high voltage switches.
Specifications
TECHNICAL DATA* | ||
---|---|---|
Network frequency | Hz | 50 / 60 |
Insulation level
|
kVp |
750 |
Operating times
|
ms |
28 +/- 2 |
Rated making current | kAp | 120 |
Insertion current | A | 5,000 |
Insertion voltage | kVp | 300 |
Cycles
|
C - 0.2 s - OC - 15s | |
* Standard value, for other, please contact us |
Drawings

Recommended Products & services
GL 314 / GL 314X
Live tank circuit breaker for 245 / 300 kV
Highly Reliable Performance
GE Vernova’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.
GL 314 / GL 314X
Live tank circuit breaker for 245 / 300 kV
Highly Reliable Performance
GE Vernova’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.
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.
Specifications
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 | kV | 460/530 | 460/530 | 460/530 | ||
- At lightning impulse (1.2 / 50 µs wave) | kV (peak) | 1,050/ 1,200 | 1,050/ 1,200 | 1,050/ 1,050(+170) | ||
- At switching impulse | kV (peak) | N/A | N/A | 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. |
Drawings

Recommended Products & services
GL 313
Live tank circuit breakers from 145 kV up to 170 kV
Reliable Performance in Low Temperatures
GE Vernova’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.
GL 313
Live tank circuit breakers from 145 kV up to 170 kV
Reliable Performance in Low Temperatures
GE Vernova’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.
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
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.
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.
Specifications
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. |
Drawings

Recommended Products & services
GL 310, GL 311 and GL 312
Live tank circuit breakers from 100 kV up to 145 kV
Reliable Performance in Low Temperatures
GE Vernova’s GL 310, GL 311 and GL 312 live tank circuit breakers for outdoor installation are designed for temperatures down to -60°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%.
GL 310, GL 311 and GL 312
Live tank circuit breakers from 100 kV up to 145 kV
Reliable Performance in Low Temperatures
GE Vernova’s GL 310, GL 311 and GL 312 live tank circuit breakers for outdoor installation are designed for temperatures down to -60°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%.
High Quality Components
The GL 310, GL 311 and GL 312 live tank circuit breakers provide 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
- Single-pole operated circuit breakers partially pre-assembled before delivery (base frame with the mounted and wired mechanisms)
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
Specifications
Breaker type | GL 310 F1/4031 P/ GL 310 F3/4031 P | GL 311 F1/4031 P/ GL 311 F3/4031 P | GL 312 F1/4031 P/ GL 312 F3/4031 P |
---|---|---|---|
Rated voltage | 100 kV | 123 kV | 145 kV |
Rated frequency | 50/60 Hz | 50/60 Hz | 50/60 Hz |
Rated normal current | up to 3,150 A | up to 3,150 A | up to 3,150 A |
Rated short-circuit breaking current | up to 40 kA | up to 40 kA | up to 40 kA |
Rated short-circuit making current | 104 kA | 104 kA | 104 kA |
Rated duration of short-circuit | 3 s | 3 s | 3 s |
Opening time | 28 ms | 28 ms | 28 ms |
Break time | 50 ms | 50 ms | 50ms |
Closing time | ≤70 ms | ≤70 ms | ≤70 ms |
Average ambient temperature* | -30 °C up to +40 °C | -30 °C up to +40 °C | -30 °C up to +40 °C |
Design altitude* | 1,000 m.a.s.l. | 1,000 m.a.s.l. | 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 |
Drawings

Recommended Products & services
GL 310 S, GL 311 S & GL 312 S
Live tank circuit breakers from 100 kV up to 145 kV
Reliable Performance in Low Temperatures
GE Vernova's GL 310 S, GL 311 S and GL 312 S live tank circuit breakers for outdoor installation are designed for temperatures down to -30 °C with pure SF₆. They feature the latest technologies in interrupter chambers and spring-operated mechanisms. Our latest single-motion technology provides an optimum solution for applications within this range of minimum temperature.
GL 310 S, GL 311 S & GL 312 S
Live tank circuit breakers from 100 kV up to 145 kV
Reliable Performance in Low Temperatures
GE Vernova's GL 310 S, GL 311 S and GL 312 S live tank circuit breakers for outdoor installation are designed for temperatures down to -30 °C with pure SF₆. They feature the latest technologies in interrupter chambers and spring-operated mechanisms. Our latest single-motion technology provides an optimum solution for applications within this range of minimum temperature.
High performance
- Live tank circuit breakers ensure a high level of reliability
- Even under extreme conditions and climates or in highly active seismic areas, customers can count on live tank circuit breakers made by GE Vernova
Right choice for temperatures down to -30 °C
- Three-pole operated mechanism live tank circuit breakers for outdoor installation are designed for temperatures down to -30 °C and feature the latest technologies in interrupting chambers and spring-operated mechanisms
Reduced gas mass/ environmental impact
- SF₆ volume reduced by 15% compared to previous version while optimizing the internal volume
- CO2 equivalence of gas mass reduced by 29 tons
Safety
- Pressure relief device prevents from injuries and damages in case of over-pressure within the circuit breaker
- Support frame design ensures personnel cannot be injured by cinematic moving parts
- Dedicated tools are designed to assemble and disassemble circuit breaker parts in safe condition
Easy Installation and Light Maintenance
- Preset and pre-filled at factory before shipping - no adjustments necessary during installation and commissioning
- Long maintenance intervals
- Easy access to desiccant bags and simple inspections
- Two-stage transducer densimeters are within easy reach, on the front side of the circuit breaker, for periodic/regular check
Quality and Testing
GE Vernova's live tank circuit breakers meet the latest versions of national and international standards, such as IEC 62271-100. The entire development and production procedures are fully compliant with the latest ISO 9001, ISO 14001 and OHSAS 18001 quality standards.
High Quality Components
The GL 310 S, GL 311 S, and GL 312 S live tank circuit breakers provide high reliability based on high quality components, including :
- Interrupter chamber with self-blast system and reliable single-motion technology
- Reliable spring-operated mechanism with position indicator clearly visible from outside
- Pressure relief system for passive protection of substation and personnel
- Field-proven, temperature-compensated density monitor with two-stage transducer and three-color dial
- Easy access to the SF₆ filling connection (DILO type)
- SF₆ non-return (check) valve on each pole column
- Opening and closing spring in drive
- Steel support frame design prevents corrosion issues and provides high safety for employees and high protection against environmental ingress (e.g. ice)
- Optimum designed cinematic between mechanism and interrupting chamber to increase mechanical energy efficiency and mechanical moving parts reliability
Technical Characteristics
- Spring-operated mechanism / degree of protection : FK 3-1 / IP 55
- Rated operating sequence : O-0.3s-CO-3min-CO resp. CO-15s-CO
- Rated supply voltage : From 24 V up to 250 V dc/ac
Product Options
- CBWatch monitoring system
Specifications
Breaker type | GL 310 S | GL 311 S | GL 312 S |
---|---|---|---|
Rated voltage | 100 kV | 123 kV | 145 kV |
Rated frequency | 50 Hz | 50 Hz | 50 Hz |
Rated normal current | 3,150 A | 3,150 A | 3,150 A |
Rated short-circuit breaking current | 40 kA | 40 kA | 40 kA |
Rated short-circuit making current | 100 kA | 100 kA | 100 kA |
Rated duration of short-circuit | 3 s | 3 s | 3 s |
First Pole to clear factor | 1.3/1.5 | 1.3/1.5 | 1.3/1.5 |
Opening time | 27-37 ms | 27-37 ms | 27-37 ms |
Breaking time | 50-60 ms | 50-60 ms | 50-60 ms |
Closing time | 70 ms | 70 ms | 70 ms |
Average ambient temperature** | -30 °C up to +40 °C | -30 °C up to +40 °C | -30 °C up to +40 °C |
Design altitude* | 1,000 m.a.s.l. | 1,000 m.a.s.l. | 1,000 m.a.s.l. |
Pollution level** | 25 mm/kV | 25 mm/kV | 25 mm/kV |
* Standard values according to IEC. Higher design altitudes available on request | |||
** Other temperatures and pollution levels available on request |
Drawings

GL 311 S/312 S – other phase center distance available on request
Recommended Products & services
GL 309g, GL 310g, GL 311g and GL 312g
g³ live tank circuit breakers from 72.5 kV up to 145 kV
GE Vernova’s GL 309g, 310g, GL 311g and GL 312g live tank circuit breakers for outdoor installation are designed for temperatures down to -30°C. These SF₆-free breakers use GE Vernova’s g³ to replace SF₆ as switching gas. They feature the latest technologies in interrupting chambers and spring-operated mechanisms. They are based on GE Vernova’s latest double motion technology which effectively reduces the needed opening energy.
GL 309g, GL 310g, GL 311g and GL 312g
g³ live tank circuit breakers from 72.5 kV up to 145 kV
GE Vernova’s GL 309g, 310g, GL 311g and GL 312g live tank circuit breakers for outdoor installation are designed for temperatures down to -30°C. These SF₆-free breakers use GE Vernova’s g³ to replace SF₆ as switching gas. They feature the latest technologies in interrupting chambers and spring-operated mechanisms. They are based on GE Vernova’s latest double motion technology which effectively reduces the needed opening energy.
High Quality Components
The GL 3109g, GL 310g, GL 311g and GL 312g live tank circuit breakers provide high reliability based on high quality components, including:
- Interrupter chamber with integral double motion technology and self-blast system
- Composite insulator and 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 g³ filling connection (DILO type with g3 specific thread)
- g³ non-return (check) valve on each pole column
- Hot-dip galvanized steel parts
- Rust free mechanism housing made completely of aluminum
- Reliable spring-operated mechanism with position indicator clearly visible from outside
- CBWatch gas monitoring available on request (optional)
Installation, Operation and Maintenance
- As easy on-site installation as with SF₆ CB
- Preset at factory before shipping; no adjustments necessary during installation and commissioning
- Pole units pre-filled with g³ at factory before shipping
- Independent disassembly of the interrupter chamber without having to remove the entire pole column
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 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.
Specifications
Breaker type | GL 309g F3/4031 | GL 310g F3/4031 | GL 311g F3/4031 | GL 312g F3/4031 |
Rated voltage | 72.5 kV | 100 kV | 123 kV | 145 kV |
Rated frequency | 50 Hz | 50 Hz | 50 Hz | 50 Hz |
Rated normal current | up to 3,150 A | up to 3,150 A | up to 3,150 A | up to 3,150 A |
Rated short-circuit breaking current | up to 40 kA | up to 40 kA | up to 40 kA | up to 40 kA |
Rated short-circuit making current | 104 kA | 104 kA | 104 kA | 104 kA |
Rated duration of short-circuit | 3 s | 3 s | 3 s | 3 s |
Opening time | 31 ms | 31 ms | 31 ms | 31 ms |
Break time | 50 ms | 50 ms | 50 ms | 50 ms |
Closing time | 100 ms | 100 ms | 100 ms | 100 ms |
Average ambient temperature | -30 °C up to +40 °C | -30 °C up to +40 °C | -30 °C up to +40 °C | -30 °C up to +40 °C |
Design altitude* | 1,000 m.a.s.l. | 1,000 m.a.s.l. | 1,000 m.a.s.l. | 1,000 m.a.s.l. |
* Standard values according to IEC; Higher design altitudes available on request |
Drawings
