FR2428931A1 - Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes - Google Patents

Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes

Info

Publication number
FR2428931A1
FR2428931A1 FR7817583A FR7817583A FR2428931A1 FR 2428931 A1 FR2428931 A1 FR 2428931A1 FR 7817583 A FR7817583 A FR 7817583A FR 7817583 A FR7817583 A FR 7817583A FR 2428931 A1 FR2428931 A1 FR 2428931A1
Authority
FR
France
Prior art keywords
relay
rectifying diodes
detector
power line
reed relay
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
FR7817583A
Other languages
French (fr)
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.)
DENISSELLE JEAN CLAUDE
Original Assignee
DENISSELLE JEAN CLAUDE
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 DENISSELLE JEAN CLAUDE filed Critical DENISSELLE JEAN CLAUDE
Priority to FR7817583A priority Critical patent/FR2428931A1/en
Publication of FR2428931A1 publication Critical patent/FR2428931A1/en
Pending 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
    • G01R31/54—Testing for continuity
    • 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
    • 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
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

The detection of breaks in electrical conductors is by measurement of the characteristics of the current in the current in the conductor. The detection is based on the use of a reed relay (N-M) with two or three separate coils wound together (L1, L2, L3). Two such coils (L1, L2) are fed in opposition via rectifying diodes (D1, D2) from the line voltage (E) such that there is normally a positive or relay closed field around the relay. The two windings are finally commoned (S) and taken into the load circuit. A further coil (L3) can be included, this having short circuited terminals ensuring that the relay electrodes normally remain closed. High power lines can be accommodated by use of a suitable low power transformer about 0-2VA at the detector input.
FR7817583A 1978-06-13 1978-06-13 Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes Pending FR2428931A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7817583A FR2428931A1 (en) 1978-06-13 1978-06-13 Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7817583A FR2428931A1 (en) 1978-06-13 1978-06-13 Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes

Publications (1)

Publication Number Publication Date
FR2428931A1 true FR2428931A1 (en) 1980-01-11

Family

ID=9209409

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7817583A Pending FR2428931A1 (en) 1978-06-13 1978-06-13 Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes

Country Status (1)

Country Link
FR (1) FR2428931A1 (en)

Similar Documents

Publication Publication Date Title
US5615075A (en) AC/DC current sensor for a circuit breaker
ES8302963A1 (en) Low voltage circuit breaker with adjustable hybrid triggering.
GB1231108A (en)
KR910017253A (en) Differential protection circuit
GB1001512A (en) Improvements in or relating to electric transformers
ATE3679T1 (en) FULLY INSULATED, METAL ENCLOSED HIGH VOLTAGE SWITCHGEAR WITH SINGLE-LINE CURRENT TRANSFORMERS.
US6445268B1 (en) Instantaneous trip power transformer
FR2428931A1 (en) Detector for power line breaks - uses two or three winding reed relay with associated rectifying diodes
GB923870A (en) Electrical inductive apparatus
US2434214A (en) Protective system for current convertors utilizing differentially connected saturable reactors
JPS5495196A (en) Protective circuit of superconductive coil
KR830008440A (en) Circuit breaker
FR2321208A1 (en) Detection of leakage current to earth - uses differential current transformer whose core is saturated by leakage current
KR830008453A (en) Circuit breaker
SU1061065A2 (en) Device for measuring switch contact insulation resistance
SU1112474A1 (en) Device for differential protecting of three-phase motor
JPS6441871A (en) Insulation degrading detector for electric equipment and cable
SU625257A1 (en) Loading transformer
GB1256011A (en) Apparatus incorporating an electrical isolating transformer
JPS5642322A (en) Main and subsidiary type potential transformer
SU603041A1 (en) Device for protective disconnecting of electric plant
US1251738A (en) Protective system for transformers.
SU611266A1 (en) Power transmission line
SU871236A1 (en) Current transformer
JPS56133992A (en) Braking device for synchronous machine