EP3830589A1 - Dispositif de surveillance de contact pour dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation - Google Patents

Dispositif de surveillance de contact pour dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation

Info

Publication number
EP3830589A1
EP3830589A1 EP19778820.1A EP19778820A EP3830589A1 EP 3830589 A1 EP3830589 A1 EP 3830589A1 EP 19778820 A EP19778820 A EP 19778820A EP 3830589 A1 EP3830589 A1 EP 3830589A1
Authority
EP
European Patent Office
Prior art keywords
contact monitoring
monitoring device
triggering
switching
redundant electrical
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.)
Withdrawn
Application number
EP19778820.1A
Other languages
German (de)
English (en)
Inventor
Martin Maier
Uwe Weiss
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP3830589A1 publication Critical patent/EP3830589A1/fr
Withdrawn legal-status Critical Current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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • 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
    • G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit

Definitions

  • the invention relates to a contact monitoring device for a safety-critical triggering device
  • Switchgear with a circuit diagram arranged on a first switching carrier medium for a triggering device and triggering electronics arranged on a second switching carrier medium as well as a method for monitoring this safety-critical triggering device of a switching device.
  • this object is achieved by a contact monitoring device for a safety-critical Auslettesvor direction of a switching device with a trigger device arranged on a first switching medium and a release electronics arranged on a second switching medium.
  • the invention is characterized in that the contact monitoring device has redundant electrical connections which are monitored in such a way that the failure of a redundant electrical connection is already known.
  • the invention is based on a redundant design of the electrical connections.
  • the connection is monitored so that the failure of a redundant connection is already recognized. This can either give a warning that the device needs to be replaced, or it can be triggered immediately via the remaining redundant connection.
  • the essence of the invention is monitoring the redundant connections with the possibility of detecting the failure of a single connection.
  • the release electronics and the magnetic release are not arranged on a structural unit, ie printed circuit board or switch carrier medium, but are coupled via a cable / plug / solder connection.
  • a transistor is driven so that a current flows through the magnetic release and unlocks it. If this connection is broken, can no longer trigger the switching device, which triggers a safety-critical state.
  • connection between the switch carrier media can be set up redundantly by using several cables for the connection via several plug contacts / solder connections. The failure of a single cable / contact then does not affect the function. Nevertheless, the connection must be monitored, as otherwise the individual failure can go unnoticed for a long time and ultimately lead to the failure of the device if another connection fails.
  • a transistor which normally drives the current to trigger the magnetic release is only activated with a short pulse which is not sufficient to trigger the unlocking of the magnetic release.
  • this short pulse is sufficient to lead to a current flow, the course of which depends on the total impedance of the current circuit.
  • This total impedance is formed in addition to the inductance and the resistance of the magnetic release by series resistors. If a connector or cable fails, the total impedance will increase and the current will be slightly smaller.
  • the current is measured and fed to a comparator or an analog-to-digital converter (ADC), for example, for evaluation.
  • ADC analog-to-digital converter
  • the resistors can also be omitted.
  • a capacitance can be connected in parallel to the magnetic release. The current will then rise rapidly, but will flow almost exclusively through this capacity and will not trigger the magnetic trigger.
  • the impedance of the magnetic release itself can also be monitored.
  • the behavior described can be observed in the simulation. With a suitable choice of a comparator threshold, the changed behavior can be registered. Such a comparator is included in many microcontrollers, so that no additional effort arises apart from the series resistors. If the electrical connections have a sufficiently high impedance, these can also be dispensed with.
  • a continuation of this concept according to the invention can consist in the fact that the trigger electronics on the second switching carrier medium have at least one transistor, which can be controlled via a short electrical pulse, which is not sufficient to implement the release of the trigger device.
  • the trigger electronics on the second switching carrier medium have a plurality of series resistors which are electrically connected to the transistor.
  • the total impedance of the tripping electronics is formed by the inductance, the resistance in the tripping device and the plurality of series resistors.
  • a continuation of this concept according to the invention may consist in the failure of a redundant electrical connection being characterized by an increase in the overall impedance or a reduction in the current flow.
  • a special embodiment shows that if a redundant electrical connection fails, the current flow is measured and fed to a comparator or an analog-digital converter (ADC) for evaluation.
  • ADC analog-digital converter
  • the plurality of series resistors is replaced by a suitable line if the impedance is sufficient.
  • a continuation of this concept according to the invention can consist in the fact that a capacitance is connected in parallel to the trigger device on the first switching medium, so that a short electrical pulse is sufficient to obtain an evaluable current.
  • the redundant electrical connections have to be controlled individually.
  • a teach-in function is formed in the contact monitoring device.
  • the object is also achieved by a method for monitoring a safety-critical tripping device of a switching device with a circuit diagram for a tripping device arranged on a first switching carrier medium and a tripping electronics arranged on a second switching carrier medium, the total impedance in the circuit, which is derived from the circuit diagram for the tripping device and the circuit diagram of the tripping electronics, which are connected to one another via redundant electrical connections, are determined and fed to a comparator or an analog-to-digital converter (ADC) for evaluation.
  • ADC analog-to-digital converter
  • the contact monitoring device for a safety-critical triggering device of a switching device has two switching carrier media which are connected to one another via redundant electrical connections.
  • the release electronics of a magnetic release device are arranged on the first switching carrier medium.
  • the Auslettevor direction is arranged on the second switching medium.
  • the trigger electronics has a transistor, which with a plurality of series resistors is electrically connected.
  • the plurality of series resistors is connected to the tripping device via the electrically redundant connections.
  • a capacitance can be connected in parallel to the triggering device on the switch carrier medium.
  • a shunt can be positioned in front of the transistor.
  • Figure 1 is a circuit diagram of a contact monitoring device according to the invention for a safety-critical tripping device of a switching device.
  • FIG. 2 shows a diagram of a current profile in a simulation with and without line defect of a redundant electrical connection.
  • FIG. 3 shows a circuit diagram of a contact monitoring device according to the invention for a safety-critical triggering device of a switching device with individual control.
  • Fig. 1 shows a contact monitoring device according to the invention for a safety-critical triggering device egg nes switching device.
  • This contact monitoring device has two switch carrier media 1, 2, which are connected to one another via redundant electrical connections 3.
  • the trigger electronics 4 of a magnetic trigger device 5 are arranged on the switching carrier medium 1.
  • the Auslettevor direction 5 is arranged on the second switching medium.
  • the trigger electronics 4 has a transistor 6 which is electrically connected to a plurality of series resistors 7. The majority of series resistors 7 are connected via the trically redundant connections 3 connected to the trigger device 5.
  • a capacitance 8 can be connected to the switching medium 2.
  • a shunt 9 can be positioned in front of the transistor 6.
  • Fig. 2 shows a current profile in a simulation with and without line defect of a redundant electrical connec tion.
  • the curve profile 10 shows the current profile of a clocked redundant electrical connection 3.
  • the curve profile 11 shows the current profile of a defective redundant electrical connection 3.
  • Fig. 3 shows a contact monitoring device according to the invention for a safety-critical triggering device egg nes switching device with individual control.
  • the contact monitoring device has two switch carrier media 12, 13 which are connected to one another via redundant electrical connections 14.
  • the trigger electronics 15 of a magnetic trigger device 16 are arranged on the switching carrier medium 12.
  • the trigger device 16 is arranged on the second switching medium 13.
  • the trigger electronics 15 has a plurality of transistors 17 which are individually electrically connected to the trigger device 16 via the redundant electrical connections 14. Shunts 18 can be positioned in front of the transistors 17.
  • the contact monitoring device according to the invention and the method for monitoring a safety-critical triggering device of a switching device are distinguished by the fact that they monitor the redundant connections the failure of individual redundant connections can be reliably and easily identified by measuring the total impedance.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Keying Circuit Devices (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un dispositif de surveillance de contact destiné à un dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation. Le dispositif de surveillance de contact comprend un schéma de circuit destiné à un dispositif de déclenchement (5, 16) et disposé sur un premier de support de commutation (1, 12) et une électronique de déclenchement (4, 15) disposée sur un deuxième support de commutation (2, 3). L'invention est caractérisée en ce que le dispositif de surveillance de contact comporte des liaisons électriques redondantes (3, 14) qui sont surveillées de manière à déjà détecter la défaillance d'une liaison électrique redondante (3, 14).
EP19778820.1A 2018-09-12 2019-09-11 Dispositif de surveillance de contact pour dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation Withdrawn EP3830589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018215536.4A DE102018215536A1 (de) 2018-09-12 2018-09-12 Kontaktüberwachungseinrichtung für eine sicherheitskritische Auslösevorrichtung eines Schaltgeräts
PCT/EP2019/074193 WO2020053254A1 (fr) 2018-09-12 2019-09-11 Dispositif de surveillance de contact pour dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation

Publications (1)

Publication Number Publication Date
EP3830589A1 true EP3830589A1 (fr) 2021-06-09

Family

ID=68072310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19778820.1A Withdrawn EP3830589A1 (fr) 2018-09-12 2019-09-11 Dispositif de surveillance de contact pour dispositif de déclenchement critique en termes de sécurité d'un appareil de commutation

Country Status (6)

Country Link
US (1) US20220050141A1 (fr)
EP (1) EP3830589A1 (fr)
CN (1) CN113056679A (fr)
BR (1) BR112021004548A2 (fr)
DE (1) DE102018215536A1 (fr)
WO (1) WO2020053254A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021128050A1 (de) * 2021-10-27 2023-04-27 WAGO Verwaltungsgesellschaft mit beschränkter Haftung Schaltung mit schalter zum entladen von mit einem sicherheitsgerichteten digitalen eingang verbundenen kapazitiven elementen
US11808820B1 (en) * 2022-08-02 2023-11-07 Apple Inc. Fault detection for redundant connections

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59004817D1 (de) * 1990-07-12 1994-04-07 Elektronik Geraetewerk Gmbh Vorrichtung zur Sicherheitsüberwachung bei Schutzeinrichtungen mit normaler und überhöhter Sicherheit von mehrachsigen Drehbewegungen durchführenden Maschinen.
DE4309007A1 (de) * 1993-03-20 1994-09-22 Elektronik Geraetewerk Gmbh Sicherheitsüberwachungsverfahren bei Schutzeinrichtungen von Maschinen und Vorrichtung zur Durchführung des Verfahrens
DE10325363A1 (de) * 2003-05-23 2005-01-13 Pilz Gmbh & Co. Sicherheitsschaltgerät zum fehlersicheren Abschalten eines elektrischen Verbrauchers sowie entsprechendes Verfahren
EP2357484B1 (fr) * 2010-01-25 2013-03-13 Siemens Aktiengesellschaft Procédé de diagnostic d'une connexion électrique et unité de sortie
DE102011013720A1 (de) * 2011-03-11 2012-09-13 Phoenix Contact Gmbh & Co. Kg Sicherheitsrelais und sicherheitsgerichtetes Kommunikationssystem
DE202012012591U1 (de) * 2012-01-13 2013-07-17 Siemens Aktiengesellschaft Vorrichtung zum Erkennen eines Schaltzustandes eines Schaltkontakts
DE102016200309B3 (de) * 2016-01-13 2017-03-09 Bender Gmbh & Co. Kg Verfahren zum Erkennen einer Unterbrechung eines aktiven Leiters in einem ungeerdeten Gleichspannungs-Stromversorgungssystem
GB201603385D0 (en) * 2016-02-26 2016-04-13 Analog Devices Global A signal conditioning circuit and a relay/Circuit breaker control apparatus including such a signal conditioning circuit

Also Published As

Publication number Publication date
DE102018215536A1 (de) 2020-03-12
CN113056679A (zh) 2021-06-29
US20220050141A1 (en) 2022-02-17
BR112021004548A2 (pt) 2021-06-08
WO2020053254A1 (fr) 2020-03-19

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