JPS5457639A - Inspection for carrier protective relay device - Google Patents

Inspection for carrier protective relay device

Info

Publication number
JPS5457639A
JPS5457639A JP12420377A JP12420377A JPS5457639A JP S5457639 A JPS5457639 A JP S5457639A JP 12420377 A JP12420377 A JP 12420377A JP 12420377 A JP12420377 A JP 12420377A JP S5457639 A JPS5457639 A JP S5457639A
Authority
JP
Japan
Prior art keywords
inspection
circuit
repeating
carrier
terminal device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12420377A
Other languages
Japanese (ja)
Inventor
Masaru Yamaguchi
Yuji Haishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP12420377A priority Critical patent/JPS5457639A/en
Publication of JPS5457639A publication Critical patent/JPS5457639A/en
Pending legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To grasp a mulfunctioning of a transmitter and a transmitting line with a certainty by making a repeating inspection including a tramsmitter and a transmission line.
CONSTITUTION: After trip locks of each terminal being witnessed, an inspection is started from an A terminal of an inspection starting end and auxiliary relays 42 and 44 at the A end operate to transmit a signal repeating instruction to B end. An own end corresponding current is introduced to an addition circuit 31, another end corresponding current is modulated to a high frequency with a FM modulating circuit 14 and is transmitted to a repeating end B end from a carrier end terminal device 21. At the B end an auxiliary relay 45 is operated by a signal repeating instruction, an inspection current is received, demodulated by a FM demodulating circuit 23, modulated to a high frequency in a FM modulating circuit 14 and is repeated to the A end from a carrier end terminal device 21. At the A end a repeated signal from the B end is received at a carrier end terminal device 21 and an adequacy of an inspection is determined at a determination circuit 32
COPYRIGHT: (C)1979,JPO&Japio
JP12420377A 1977-10-17 1977-10-17 Inspection for carrier protective relay device Pending JPS5457639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12420377A JPS5457639A (en) 1977-10-17 1977-10-17 Inspection for carrier protective relay device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12420377A JPS5457639A (en) 1977-10-17 1977-10-17 Inspection for carrier protective relay device

Publications (1)

Publication Number Publication Date
JPS5457639A true JPS5457639A (en) 1979-05-09

Family

ID=14879530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12420377A Pending JPS5457639A (en) 1977-10-17 1977-10-17 Inspection for carrier protective relay device

Country Status (1)

Country Link
JP (1) JPS5457639A (en)

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