SF6 density relay does not remove check plus three-way valve

韦弗斯解决方案

应用案例

SF6安全保障专家

专注于SF6气体检测的专业化

135 85763546

SF6 density relay in 550KV switching station of Ha

Project profile

China Coal Hami Power Generation Co., LTD. 2× 660MW domestic supercritical surface type indirect air cooled coal-fired generator group. It is located on the Gobi Desert about 60km south to west of Hami City. The site is located in Nanhu Township, north from Nanhu Township about 30km, northeast from Hami City about 60km. 500KV booster station adopts 3/2 connection, voltage level 500KV, a total of 3 intervals of 9 groups of 27 circuit breakers. The circuit breaker is produced by Suzhou ALSTOM High Voltage Electric Switch Co., LTD. Model: GL317X, rated voltage: 550KV, rated current 4000A, operation time: 2014. The 500KV circuit breaker in the booster station is GL317X type SF6 circuit breaker produced by Suzhou ALSTOM High Voltage Electrical Switch Co., LTD., with a total of 9 groups (3 sets per group).

The circuit breaker SF6 density relay does not remove the check and install the three-way valve to transform into 9 groups of 27, which is suitable for 500KV booster station 5011, 5012, 5013, 5021, 5022, 5023, 5031, 5032, 5033 circuit breaker SF6 density relay transformation.

4.1 Pressure rating: PN64;

4.22. Sealing requirements: the spool is metal sealed (oxidation resistance, corrosion resistance)

4.3 Sealing performance: leakage rate <10-15MPa.m3/s;

4.4 Ambient temperature: -40℃ -100℃;

4.5 Impact resistance :600m/s2,

4.6 Impact time: 11ms;

4.7 Material: Valve body is metal alloy, laser integrated gold-plated needle valve structure; In kind

4.8 Anti-riot pressure test: under 4 times PN, the valve is normal;

4.9 Impact test: After 10000 times of impact, the leakage value is less than 1× 10-8mbar*l/s;

4.10 Rotation test: Install rotation test for thread 500 times, without any change in thread; Corrosion environment test: IEC60068-2-11 standard test.

4.11 Three way valve material requirements: anti-oxidation, corrosion resistance

4.12 Interface: GIS ABB circuit breaker special interface

4.13 Protection level: IP65

4.14 Service life: 10000 times or more (on-line detection of valve switching times)

Meet the National Energy Administration issued in 2014 "Twenty-five key requirements for Preventing Power Production accidents" “ Prevention of GIS and switchgear accidents stipulated in Article 13.1.6, the connection mode between SF6 density relay and circuit breaker body shall meet the requirements of not disassembling check density relay” .