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Title:
ON-SITE FAULT DIAGNOSIS INSTRUMENT FOR INTELLIGENT SINGLE-PHASE ELECTRIC ENERGY METER
Document Type and Number:
WIPO Patent Application WO/2021/082531
Kind Code:
A1
Abstract:
Provided is an on-site fault diagnosis instrument for an intelligent single-phase electric energy meter. When a user does not use electricity or when a current signal collected by a current clamp is almost zero, the fault diagnosis instrument can automatically enable a magnetic latching relay (S1) to close, an output end of an isolation power supply unit generates a virtual load current, and current sampling of the virtual load current can be completed by an intelligent single-phase electric energy meter to be tested and the fault diagnosis instrument. The fault diagnosis instrument can solve the problem of complicated wiring that occurs when a user does not use electricity and an external electric load needs to be connected, and can complete the requirements of on-site fault diagnosis in time, thereby greatly improving the working efficiency of on-site power operation and maintenance personnel.

Inventors:
GU ZHANLEI (CN)
LIU YONGGUANG (CN)
LU LIJUN (CN)
WANG YAN (CN)
XU XIAONA (CN)
SUN BIN (CN)
WU ZHULIN (CN)
YANG LIN (CN)
Application Number:
PCT/CN2020/102504
Publication Date:
May 06, 2021
Filing Date:
July 16, 2020
Export Citation:
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Assignee:
XJ METERING CO LTD (CN)
XJ GROUP CORP (CN)
International Classes:
G01R35/04
Domestic Patent References:
WO2017158385A12017-09-21
Foreign References:
CN2938136Y2007-08-22
CN203572957U2014-04-30
CN102944864A2013-02-27
CN203849399U2014-09-24
CN204142951U2015-02-04
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)
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