Title:
VOLTAGE PROTECTION APPARATUS AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/237905
Kind Code:
A1
Abstract:
The present application relates to a voltage protection apparatus and system. The voltage protection apparatus comprises: at least one piezoresistor connected in series between a signal reference ground of a printed circuit board and a first connector, and a high-voltage capacitor connected in series between the signal reference ground and a metal housing. The first connector, the at least one piezoresistor and the high-voltage capacitor are fixed to the printed circuit board, and the first connector is a component for connecting the printed circuit board to an external device. The metal housing used for accommodating a cavity of the printed circuit board is formed on the interior, and the distance between any position on the printed circuit board and any position on an inner surface of the metal housing is greater than or equal to an electrical safety distance. The voltage protection apparatus implements the floating installation of the printed circuit board, and has a smaller electrical safety distance under the same protection voltage requirements, so that the distance between the printed circuit board and the metal housing is reduced, and the apparatus has low costs, good protection performance, high reliability, and is suitable for different use scenarios and different protection voltage requirements.
Inventors:
AN ZHEYING (CN)
CAO WENFEI (CN)
ZHAO ZIFENG (CN)
CAO WENFEI (CN)
ZHAO ZIFENG (CN)
Application Number:
PCT/CN2022/092881
Publication Date:
November 17, 2022
Filing Date:
May 13, 2022
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02H9/04
Foreign References:
| CN112351579A | 2021-02-09 | |||
| CN201663238U | 2010-12-01 | |||
| CN106922080A | 2017-07-04 | |||
| CN110739673A | 2020-01-31 | |||
| CN102735362A | 2012-10-17 | |||
| US20030068926A1 | 2003-04-10 | |||
| CN202110510999A | 2021-05-11 |
Attorney, Agent or Firm:
BEIJING GLOBAL INTELLECTUAL PROPERTY LAW FIRM (CN)
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