Darui Electric recommends:
Power qualification tool equipment SF6 gas vacuuming and filling device process description:
1. SF6 gas recovery
When SF6 is extracted from a gas chamber, the gas automatically flows through the purification filter, is compressed and cooled by the SF6 compressor, and can be stored in the SF6 storage tank in gaseous form or in liquid form under high pressure.
2. SF6 switch vacuuming
The vacuum pump removes air and moisture from the switch, and the outlet of the vacuum pump is open to the atmosphere.
3. Gas filling
Purified and dried SF6 is returned from the storage tank to the evacuated gas chamber until the pressure inside the chamber reaches the set working pressure. The above work is carried out in two steps:
Using the pressure of the SF6 storage tank to make the gas flow to the SF6 switch until the predetermined filling pressure is reached.
2. When the pressure of the SF6 storage tank is balanced with the pressure of the SF6 switch, use the compressor to pressurize and fill until the predetermined filling pressure is reached.
Precautions
a) Before starting the vacuum pump for vacuuming, decide whether to connect the pipeline to discharge outdoors as needed.
b) Before starting the vacuum pump for vacuuming, ensure that the pressure of the device or system to be evacuated is zero gauge pressure or below.
c) When it is necessary to observe the vacuum degree, open the V8 valve, and close the V8 valve at any time after observation.
d) Do not start the SF6 compressor while the vacuum is maintained.
Advantages of components:
(1) Advanced design, complete functions, reasonable structure, and simple and clear operation.
(2) Compression system: adopts SF6 special sealed compressor, no leakage.
(3) The vacuum system adopts a rotary vane vacuum pump with an automatic oil return prevention device.
(4) The purification system adopts the filter of Japan CKD company, with electric heating and built-in high-efficiency adsorbent, the purification effect is more significant (no need to frequently replace the adsorbent).
(5) The electrical system of the device automatically confirms the three-phase power supply and automatically protects against phase loss.
Main configuration:
1. SF6 compressor requirements: CA-0300 sealed compressor
a: Theoretical displacement: 12m3/h
b: Maximum discharge pressure: 2.5Mpa
c: Minimum suction pressure: 50Kpa
d: Maximum suction pressure: 0.35~0.8 Mpa
e: Power: 2.2KW
f: Power supply: 380V 50HZ
2. Vacuum pump adopts: two-stage rotary vane vacuum pump
a: The vacuum pump adopts water cooling
b: Vacuum pumping rate 4L/s
Note: The above information and technical parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.
