計器用変成器の二次側回路の電圧電流位相測定方法

Japanese Patent JP7375398

B2

To provide voltage-current phase measurement of the secondary circuit of a transformer for meters with which, when confirming the connecting state of a transformer for meters or a protective relay in a secondary circuit, it is possible to efficiently confirm the connecting state without charging a main circuit.SOLUTION: In voltage-current phase measurement of the secondary circuit of a transformer for meters for inspecting the connecting state after repair of the secondary circuit in which a protective relay is connected to the transformer for meters, with the transformer for meters attached to a main circuit, in the configuration of voltage-current phase measurement of the secondary circuit of transformer (CT, VT) for meters pertaining to the present invention, the main circuit is placed in a power outage state while the connection of the secondary circuit after repair is maintained, a protective relay test device for applying a three-phase alternating current for test is connected to one end of the repaired secondary circuit, a voltage-current phase difference meter is connected to the other end of the repaired secondary circuit, and the connecting state of the secondary circuit after repair is inspected.SELECTED DRAWING: Figure 1

Ken Tsukada
Hajime Kumagai
Kunihiko Yamaguchi
Kenichi Maruyama
Masayuki Fukuda
Yoshihiro Ohno

JP2019166795A

November 08, 2023

September 13, 2019

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TEPCO Holdings Co., Ltd.

G01R31/58; G01R31/66; H02H3/05; H02H11/00

JP2003189425A
JP2005024263A
JP2003270282A

Kosuke Tobita
Daisuke Suzuki

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