Sf6 Circuit Breaker Maintenance Manual

Since beginning the circuit breaker replacement project in 2004 itc has ge atb 7 with free standing gas ct ppj replaced or decommissioned 81 sf6 circuit breakers the cost of breaker replacement ranges from 200 000 for a 120kv breaker up tofrom 200 000 for a 120kv breaker up to 500 000 for a 345kv breaker mitsubishi 300sfmt 63e.

Sf6 circuit breaker maintenance manual.

Maintenance of power circuit breakers internet version of this manual created december 1999 hydroelectric research and technical services group the appearance of the internet version of this manual may differ from the original but the contents do not. Although sf6 has very good dielectric property. Sf6 breaker maintenance is dependent on many factors including. This breaker uses sf6 or sulfur hexafluoride as arc quenching or arc extinguisher medium.

The circuit breaker poles contain sf6 at a pressure of 380 kpa for 36kv application and 550kpa for 40 5 kv application. The procedures for handling nonfaulted sf6 are well covered in manufacturer s instruction books. Service retrofitting solutions for abb sf6 gas hpa circuit breaker. But like minimum oil circuit breaker the sf6 cb only utilizes the extinguishing property of the sf6 gas since this page is about the maintenance of sf6 circuit breaker let us go to the topic directly.

These procedures normally consist of removing the sf6 from the circuit breaker filtering and storing it in a gas cart as a liquid and transferring it back to the circuit breaker after the circuit breaker maintenance has been performed. View and download abb sf6 installation and maintenance instructions manual online. The main problem with a sf6 circuit breaker is its. The kit boxes not only minimize the risk for unwanted breakdowns but also prolong the breaker service life and ensure peak performance.

Maintenance of sf6 gas circuit breakers. The following article outlines low voltage circuit breaker preventative maintenance. R mag dead tank vacuum magnetic circuit breaker instruction manual 15 5 kv 1250 2000 3000 3700 a and 27 kv 1250 2000 a. By means of the special spring catches hook the ropes to the circuit breaker hook to the special anchoring points provided in the structure and lift.

Practicing regular maintenance and inspection of your circuit breakers is the best way to counter potential problems that may arise over time due to age and wear. The preventive maintenance kit boxes are designed to make life easier for the customers with sf6 live tank circuit breakers. Sf6 power tool pdf manual download. The circuit breaker application can directly influence the amount and frequency of maintenance that the actual breaker should recieve throughout.