Title:
【発明の名称】配電線検相器
Document Type and Number:
Japanese Patent JP3272350
Kind Code:
B2
Abstract:
PURPOSE:To make it possible to confirm the sequence of three phases and a single phase and the connection between the different phases by providing high-voltage detecting parts at the ground reference on the power-supply side and the load side of a bypass circuit, and connecting an in-phase detector and a phase-lag detector to both high-voltage detecting parts through phase detecting switches. CONSTITUTION:A phase detector comprises high-voltage detecting parts PT-C and PT-L for detecting the phase voltages of bypass circuits on the power-supply side and the load side, an in-phase detector 25x and phase-lag detectors 25C, 25L and 25Y. The detector 25C is operated when the phase of a phase voltage VS1 is delayed by 120 deg. behind a phase voltage VR1 (reference input signal). The detector 25C is not operated when the phase advances by 120 deg.. The detector 25L is operated when a phase voltage VS2 is delayed by 120 deg. behind a phase voltage VR2 and is not operated when the phase advances by 120 deg.. The detector 25X is operated when the phase voltages VR1 and VR2 are in-phase and is not operated when the phases are different. The detector 25Y is operated when the phase voltage VR2 is delayed by 120 deg. behind the phase voltage VR1 and is not operated only when the phase advances by 120 deg.. Therefore, the phase inspection of 'good' or 'bad' can be discriminated based on the combinations of the operations of the detectors 25L, 25X and 25Y.
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Inventors:
Keiichi Tanaka
gangnam light
gangnam light
Application Number:
JP12437690A
Publication Date:
April 08, 2002
Filing Date:
May 15, 1990
Export Citation:
Assignee:
KABUSHIKI KAISHA MEIDENSHA
International Classes:
G01R31/02; G01R29/18; H02H11/00; H02J3/04; H02J3/38; (IPC1-7): G01R31/02; G01R29/18; H02H11/00; H02J3/04; H02J3/38
Domestic Patent References:
| JP287934A | ||||
| JP53147332A | ||||
| JP62244239A | ||||
| JP61269615A | ||||
| JP50156970A | ||||
| JP154739U | ||||
| JP6184575U | ||||
| JP326773Y2 |
Attorney, Agent or Firm:
Fujiya Shiga (1 person outside)