Title:
【発明の名称】配電線自動区分開閉装置
Document Type and Number:
Japanese Patent JP3141807
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To disconnect a ground fault section of a distribution line and to recover the sound section quickly by making a decision that its own section is faulty when the absolute value of phase difference of overcurrent generating phase between its own section and an adjacent section on the load side exceeds 90 deg. thereby opening a section switch before the distribution line is reclosed. SOLUTION: When a distribution line 13 is interrupted through a control processing section 34, a serial interface 40 and a communication modem 42, overcurrent information and phase difference information is received from a memory 35 in the following section on the load side through communication with a switch controller 22 in that section. When the overcurrent information is present in its own section and occurrence of overcurrent is detected, the control processing section 34 determines the absolute value of difference between a phase difference of overcurrent generating phase of its own section and a phase difference of overcurrent generating phase of the following section on the load side stored in the memory 35 and makes a decision that its own section is faulty when the absolute value exceeds 90 deg.. Consequently, a section switch 20 is opened before the distribution line is recharged and recovered along with the control output circuit 38 and an open coil 29.
Inventors:
Toshiro Kajima
Application Number:
JP1457397A
Publication Date:
March 07, 2001
Filing Date:
January 09, 1997
Export Citation:
Assignee:
Nissin Electric Co., Ltd.
International Classes:
G01R31/08; H02H3/38; H02H7/26; H02H11/00; H02J3/00; H02J13/00; (IPC1-7): H02H7/26; H02H3/38; H02J3/00; H02J13/00
Domestic Patent References:
| JP4331417A | ||||
| JP4331418A | ||||
| JP5268723A | ||||
| JP425436U | ||||
| JP425435U |
Attorney, Agent or Firm:
Ryutaro Fujita