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Title:
POWER SUPPLY PROTECTION SYSTEM FOR GARAGE
Document Type and Number:
WIPO Patent Application WO/2020/155629
Kind Code:
A1
Abstract:
A power supply protection system for a garage, which is applied to the field of rail traffic. A three-phase electrical line is provided with an input normally-open contact of a garage contactor, and an interlock circuit comprising a coil of the garage contactor and a normally-closed contact of an auxiliary inverter contactor which are connected in series; a coil of the auxiliary inverter contactor is provided in an auxiliary inverter, and a normally-open contact of the auxiliary inverter contactor is provided on a three-phase bus; the coil of the auxiliary inverter contactor and the normally-open contact are used to control whether the auxiliary inverter can be connected to the three-phase bus and the three-phase electrical circuit; and the coil of the garage contactor and the input normally-open contact are used to control whether a garage socket can be connected to the three-phase bus and the three-phase electrical circuit. In conjunction with the interlock circuit, when power is supplied externally, the coil of the auxiliary inverter contactor is energized, and the normally-closed contact of the auxiliary inverter contactor is open, thereby ensuring that the input normally-opened contact of the garage contactor cannot be closed, ensuring that there is only one power supply mode at one time, and ensuring that the situation where a plurality of power sources supply power simultaneously does not occur.

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Inventors:
CHEN SANMENG (CN)
ZHOU ANDE (CN)
XIE HONGBING (CN)
YU JIANSHUN (CN)
DENG XUEWEN (CN)
Application Number:
PCT/CN2019/104894
Publication Date:
August 06, 2020
Filing Date:
September 09, 2019
Export Citation:
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Assignee:
CRRC ZHUZHOU LOCOMOTIVE CO LTD (CN)
International Classes:
H02J3/00
Foreign References:
CN109586292A2019-04-05
CN205725131U2016-11-23
CN201563002U2010-08-25
CN103715759A2014-04-09
CN101951020A2011-01-19
CN106476626A2017-03-08
CN106059053A2016-10-26
JP2008301595A2008-12-11
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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