JPS57199966A - Detecting method for failure in array of core in quad of quad cable - Google Patents

Detecting method for failure in array of core in quad of quad cable

Info

Publication number
JPS57199966A
JPS57199966A JP56085295A JP8529581A JPS57199966A JP S57199966 A JPS57199966 A JP S57199966A JP 56085295 A JP56085295 A JP 56085295A JP 8529581 A JP8529581 A JP 8529581A JP S57199966 A JPS57199966 A JP S57199966A
Authority
JP
Japan
Prior art keywords
quad
magnetic field
revolving
revolving magnetic
cores
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.)
Granted
Application number
JP56085295A
Other languages
Japanese (ja)
Other versions
JPH0125168B2 (en
Inventor
Fumio Suzuki
Hikari Yasuhara
Izumi Takashima
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.)
Fujikura Ltd
Original Assignee
Fujikura 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 Fujikura Ltd filed Critical Fujikura Ltd
Priority to JP56085295A priority Critical patent/JPS57199966A/en
Publication of JPS57199966A publication Critical patent/JPS57199966A/en
Publication of JPH0125168B2 publication Critical patent/JPH0125168B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Abstract

PURPOSE:To obtain a stable signal free of modulation due to the rotation of a quad by inducing an AC electric signal at each core by using a revolving magnetic field when cores are stranded into a quad, and detecting it by electrostatic coupling at each core before the quad stranding. CONSTITUTION:A revolving magnetic field generation part 15 consists of induction coils 15A-15D arranged radially around a quad cable 14 at pi/2 angle intervals, and pi/2 phase shifting circuit 17 for pi/2 phase shifting, and this generation part 15 produces a revolving magnetic field by using a two-phase alternating current. The revolving speed of this revolving magnetic field is set much higher than the revolving speed of a quad, and this revolving magnetic field induces AC electric signals at cores 2A-2D. Therefore, detected signals are never modulated by the rotation of the quad and an electrostatic detection part 3 and a differential detector 7 detects a fault of the array of the cores in the quad of the quad cable.
JP56085295A 1981-06-03 1981-06-03 Detecting method for failure in array of core in quad of quad cable Granted JPS57199966A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56085295A JPS57199966A (en) 1981-06-03 1981-06-03 Detecting method for failure in array of core in quad of quad cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56085295A JPS57199966A (en) 1981-06-03 1981-06-03 Detecting method for failure in array of core in quad of quad cable

Publications (2)

Publication Number Publication Date
JPS57199966A true JPS57199966A (en) 1982-12-08
JPH0125168B2 JPH0125168B2 (en) 1989-05-16

Family

ID=13854585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56085295A Granted JPS57199966A (en) 1981-06-03 1981-06-03 Detecting method for failure in array of core in quad of quad cable

Country Status (1)

Country Link
JP (1) JPS57199966A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010151816A (en) * 2008-12-23 2010-07-08 Biosense Webster Inc Twisted-pair electrical cable testing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010151816A (en) * 2008-12-23 2010-07-08 Biosense Webster Inc Twisted-pair electrical cable testing

Also Published As

Publication number Publication date
JPH0125168B2 (en) 1989-05-16

Similar Documents

Publication Publication Date Title
CA2061960A1 (en) Electric motor control apparatus and method
CA2308043A1 (en) Method and apparatus for detection, classification and reduction of internal electrical faults in alternating current propulsion machinery using synchronous detection scheme
EP0372937A3 (en) Electrical fault detecting device
TW357268B (en) Vector electricity meters and associated vector electricity metering methods
ES8501887A1 (en) Ultra-high speed protective relay apparatus and method for providing single pole switching
EP0082943A3 (en) Rotational magnetic transducer and transducer-motor assembly using the same
JPS57199966A (en) Detecting method for failure in array of core in quad of quad cable
CN210863782U (en) Shield pump turns to detection device
AU1661283A (en) Induction furnace monitor
JPS54162119A (en) Controller of induction motor
JPS5796272A (en) Zero phase current detection
ES295689U (en) Eddy current probes for detecting faults in structures and methods of detecting such faults.
JPS56153262A (en) Detecting method for short circuited point of wiring pattern
JP2562042B2 (en) Brushless d. c. Inductance sensor for motor
JPS57189554A (en) Stepping motor
JPS54115174A (en) Current detector
SU781553A1 (en) Apparatus for measuring shaft radial runouts
JPS646880A (en) Method for detecting fault section of power cable
EP0067226A1 (en) D.c. generator type non-contact speed sensing device
SU991541A2 (en) Magnetosensitive element for starting remote relay protection system
SU1385107A1 (en) Device for localizing short circuiting of cable conductors
SU1157353A1 (en) Converter for contactless transmission of slowly varying measuring signals from rotary object
SU1157485A1 (en) Method of locating sheathing fault in cable lines
JPS6459053A (en) Online electrostatic defect detector for polyester base
JPS5585261A (en) Partial discharge detector for gas insulated electric appliance