GL 318 / GL 318X
Live tank circuit breaker up to 800 kV
Reliable, Economical and Easy-to-Use
GE’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. The GL 318 and GL 318X 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. The circuit breakers include a disconnecting option allowing for quick, easy installation. For simplified maintenance, the closing resistor is located in the same gas volume as breaker chamber. |
High Quality Components
The GL 318 and GL 318X live tank circuit breakers provide high reliability based in part on high quality components, including:
Flexible Options
Installation and Maintenance
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’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 - At lightning impulse (1.2 / 50 µs wave) - At switching impulse |
kV kV (peak) kV (peak) |
830/1,150 2,100/2,100 (+455) 1,550/1,175 (+650) |
830/1,150 2,100/2,100 (+455) 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