Title:
ELECTRIC CURRENT SENSOR, ADJUSTMENT METHOD THEREFOR, TRANSFORMER HAVING SAID ELECTRIC CURRENT SENSOR MOUNTED THEREON, MEASUREMENT SYSTEM FOR ANALYZING OUTPUT OF ELECTRIC CURRENT SENSOR OF TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2021/166313
Kind Code:
A1
Abstract:
Provided is a current transformer type electric current sensor which has a magnetic circuit correction means capable of putting accuracy of voltage detected by electric current measurement in a specification value, and which can be post-fitted to a component and is compatible with mounting to a component having a large diameter. This current transformer type electric current sensor is provided with a substantially annular magnetic core having a gap and a main winding coil that measures an electric current and that is wound around the magnetic core, and is configured to openable/closable at a portion of the gap. The current transformer type electric current sensor is characterized by being provided with an auxiliary winding coil wound around the magnetic core and is characterized in that the auxiliary winding coil can select one of a first connection for connecting the auxiliary winding coil to the main winding coil such that the winding direction of the auxiliary winding coil is the same as that of the main winding coil, a second connection for connecting the auxiliary winding coil to the main winding coil such that the winding direction of the auxiliary winding coil is reverse to that of the main winding coil, and a third connection for connecting the auxiliary winding coil to a magnetic flux adjustment resistor including a 0-Ω resistor instead of connecting the auxiliary winding coil to the main winding coil.
Inventors:
SHIROSUGI TAKATOSHI (JP)
TATEMURA MAKOTO (JP)
IMAGAWA TAKAO (JP)
SATO KOHEI (JP)
NAKANOUE KENJI (JP)
TATEMURA MAKOTO (JP)
IMAGAWA TAKAO (JP)
SATO KOHEI (JP)
NAKANOUE KENJI (JP)
Application Number:
PCT/JP2020/036680
Publication Date:
August 26, 2021
Filing Date:
September 28, 2020
Export Citation:
Assignee:
HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD (JP)
International Classes:
G01R35/00; G01R15/18
Foreign References:
| JPH0514930U | 1993-02-26 | |||
| JPS6060562A | 1985-04-08 | |||
| JPH06273455A | 1994-09-30 | |||
| JP2019078552A | 2019-05-23 | |||
| JP2012068187A | 2012-04-05 | |||
| JP2016181620A | 2016-10-13 | |||
| JP2015201560A | 2015-11-12 | |||
| JPS58148821U | 1983-10-06 | |||
| JP2008235782A | 2008-10-02 | |||
| JP2001058278A | 2001-03-06 | |||
| JP2003279600A | 2003-10-02 | |||
| JP2001349908A | 2001-12-21 |
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
Download PDF:
Previous Patent: SENSOR ELEMENT AND GAS SENSOR
Next Patent: STATIONARY INDUCTION APPARATUS AND TRANSFORMER
Next Patent: STATIONARY INDUCTION APPARATUS AND TRANSFORMER