ES2026088A6 - Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals - Google Patents

Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals

Info

Publication number
ES2026088A6
ES2026088A6 ES9100651A ES9100651A ES2026088A6 ES 2026088 A6 ES2026088 A6 ES 2026088A6 ES 9100651 A ES9100651 A ES 9100651A ES 9100651 A ES9100651 A ES 9100651A ES 2026088 A6 ES2026088 A6 ES 2026088A6
Authority
ES
Spain
Prior art keywords
circuit
lead
comparators
digital signals
current flow
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.)
Expired - Lifetime
Application number
ES9100651A
Other languages
Spanish (es)
Inventor
Peter Schunk
Jorgen Tuschinsky
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.)
KE Kommunikations Elektronik GmbH and Co
Original Assignee
KE Kommunikations Elektronik GmbH and Co
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 KE Kommunikations Elektronik GmbH and Co filed Critical KE Kommunikations Elektronik GmbH and Co
Publication of ES2026088A6 publication Critical patent/ES2026088A6/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/14—Indicating direction of current; Indicating polarity of voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

One of the two comparators coupled to the lead concerned responds acording to the direction of flow of current in the lead directly it reaches a set threshold value. The outputs of the comparators are connected to an evaluating circuit for digital signals galvanically separated from the coupling circuit. The evaluating circuit (A) is supplied from a voltage source also galvanically separated from the coupling circuit. The outputs of both comparators (1,2) are connected to at least one opto-coupler (8) with its receive side coupled to the evaluating circuit to prevent the latter affecting the current detection. The voltage source can be a photo-voltaic coupler. ADVANTAGE - Current flowing in coupling circuit (K) can be kept low. No reaction on current detection from circuit conditions.
ES9100651A 1990-05-04 1991-03-13 Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals Expired - Lifetime ES2026088A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904014267 DE4014267A1 (en) 1990-05-04 1990-05-04 Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals

Publications (1)

Publication Number Publication Date
ES2026088A6 true ES2026088A6 (en) 1992-04-01

Family

ID=6405671

Family Applications (1)

Application Number Title Priority Date Filing Date
ES9100651A Expired - Lifetime ES2026088A6 (en) 1990-05-04 1991-03-13 Current flow detecting circuitry for electrical lead - couples circuit with two comparators to ohmic resistor switched into lead to supply evaluating circuit for digital signals

Country Status (2)

Country Link
DE (1) DE4014267A1 (en)
ES (1) ES2026088A6 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013004146A1 (en) * 2011-07-01 2013-01-10 厦门市老科学技术工作者协会 Online alternating current detection device and method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510387C1 (en) * 1995-03-22 1996-05-23 Siemens Ag Polarity display arrangement for ISDN terminal
DE19636954B4 (en) * 1996-09-11 2005-08-18 Infineon Technologies Ag subscriber circuit
DE19847179B4 (en) * 1998-10-14 2007-11-22 Phoenix Contact Gmbh & Co. Kg Circuit arrangement for detecting a galvanically isolated voltage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460077A1 (en) * 1979-06-26 1981-01-16 Constr Telephoniques Pulse sampler with transformer isolation - detects line current using comparator amplifier to change secondary loading
DE2952462C2 (en) * 1979-12-27 1982-01-21 Siemens AG, 1000 Berlin und 8000 München Monitoring device for identifying the operating status of a consumer
DD267805A1 (en) * 1987-12-08 1989-05-10 Elektroprojekt Anlagenbau Veb window

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013004146A1 (en) * 2011-07-01 2013-01-10 厦门市老科学技术工作者协会 Online alternating current detection device and method
US9279833B2 (en) 2011-07-01 2016-03-08 Xuanlai You Online alternating current detection device and method

Also Published As

Publication number Publication date
DE4014267A1 (en) 1991-11-07

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19991209