Title:
GAS DENSITY RELAY WITH ONLINE SELF-CHECKING FUNCTION, AND CHECKING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/218290
Kind Code:
A1
Abstract:
Provided are a gas density relay with an online self-checking function, and a checking method therefor. The gas density relay comprises a gas density relay body, a first pressure sensor, a third pressure sensor, a temperature sensor, a pressure regulation mechanism, an online checking contact signal sampling unit and an intelligent control unit. The gas density relay body comprises: a shell; a first sealed gas chamber, which is in communication with an insulating gas chamber of an electrical device, and a second sealed gas chamber, which is filled with a standard compensation gas, the sealed gas chambers being located inside the shell; and a third gas chamber, which is provided with a signal generator and a signal regulation mechanism, wherein the first pressure sensor is in communication with the first sealed gas chamber, and the third pressure sensor is in communication with a third sealed gas chamber; and the intelligent control unit regulates the rise and fall of the pressure in the third sealed gas chamber by controlling the pressure regulation mechanism, so that the gas density relay body produces a contact action to complete checking work of the gas density relay without the need for a maintenance staff member to perform checking on-site, thereby improving the working efficiency and reducing the sealing requirements of a power grid.
More Like This:
| WO/1999/010780 | METHOD FOR DETECTING MALFUNCTIONS OF A FIRST RELAY |
| WO/2020/020988 | TEST PLUG BLOCK AND TEST TERMINAL BLOCK |
Inventors:
CHEN JIN (CN)
HUANG XIAOBENG (CN)
CHANG MIN (CN)
JIN HAIYONG (CN)
XIA TIEXIN (CN)
HUANG XIAOBENG (CN)
CHANG MIN (CN)
JIN HAIYONG (CN)
XIA TIEXIN (CN)
Application Number:
PCT/CN2021/076136
Publication Date:
November 04, 2021
Filing Date:
February 09, 2021
Export Citation:
Assignee:
SHANGHAI ROYE ELECTRIC CO LTD (CN)
International Classes:
G01R31/327; G01N9/00; H01H35/26; H01H35/32; H01H35/38
Foreign References:
| CN110459431A | 2019-11-15 | |||
| CN110988667A | 2020-04-10 | |||
| CN111446112A | 2020-07-24 | |||
| CN211719506U | 2020-10-20 | |||
| KR101936244B1 | 2019-01-08 | |||
| CN110568350A | 2019-12-13 |
Attorney, Agent or Firm:
SHANGHAI IPOWER LAW FIRM (CN)
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