WO2008110540A2 - Interrupteur, notamment interrupteur-sectionneur à fusibles, et dispositif de protection contre les surtensions d'un tel interrupteur - Google Patents

Interrupteur, notamment interrupteur-sectionneur à fusibles, et dispositif de protection contre les surtensions d'un tel interrupteur Download PDF

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Publication number
WO2008110540A2
WO2008110540A2 PCT/EP2008/052837 EP2008052837W WO2008110540A2 WO 2008110540 A2 WO2008110540 A2 WO 2008110540A2 EP 2008052837 W EP2008052837 W EP 2008052837W WO 2008110540 A2 WO2008110540 A2 WO 2008110540A2
Authority
WO
WIPO (PCT)
Prior art keywords
switch
disconnector
power supply
regulator
voltage limiter
Prior art date
Application number
PCT/EP2008/052837
Other languages
German (de)
English (en)
Other versions
WO2008110540A3 (fr
Inventor
Andreas Fischer
Karl-Hans BÄRNKLAU
Josef Götz
Original Assignee
Siemens Aktiengesellschaft
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 Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2008110540A2 publication Critical patent/WO2008110540A2/fr
Publication of WO2008110540A3 publication Critical patent/WO2008110540A3/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/30—Means for indicating condition of fuse structurally associated with the fuse
    • 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
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/046—Signalling the blowing of a fuse
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device

Definitions

  • Switch in particular fuse switch disconnectors, and overvoltage protection for such a switch
  • the invention relates to a switch, in particular a fuse switch disconnector, and an overvoltage protection for such a switch according to the preambles of claims 1 and 4.
  • Fuse switch disconnectors to protect consumers from short circuit and overcurrents are known. They usually have for each phase of an electric power supply to a fuse that melts in the short-circuit and / or overcurrent event and so interrupts the current flow through the consumer un ⁇ .
  • the condition of the fuses is frequently ⁇ fig monitored by an electronics, which is also powered by the power supply to the load with electric power.
  • a (clocked) switching power supply or a longitudinally regulated power supply unit is used, which rectifies the alternating current of the power supply by means of a rectifier circuit, wherein the rectifier circuit is usually followed by a voltage regulator. If the consumers are a motor or a transformer, surges may occur when the fuses melt, which can damage the voltage regulator of the electronics, for example.
  • the object of the invention is to protect the electronics in the event of short circuit and overcurrent from overvoltages.
  • the object is based on the switch by the features of claim 1 and based on the overvoltage protection solved by the features of claim 4; the Unteran ⁇ claims relate to advantageous embodiments.
  • the solution provides for a voltage limiter to be connected in parallel with the energy regulator and a PTC thermistor in series with the parallel connection of the energy controller and voltage limiter.
  • the PTC or PTC resistor ⁇ he höht in short-circuit and over-current case because of f burn- the high current and the associated heating of the
  • PTC resistor its resistance, which significantly reduces the current through the voltage limiter. In this way, the power dissipation in the voltage limiter reduces dissipated power loss during the presence of an overvoltage.
  • a simple embodiment of the interruption element is a fuse.
  • the energy regulator belongs to a switching power supply ⁇ .
  • a power supply network SN is shown with its phases Ll, L2, L3, N, PE, to which a three-phase motor M is connected as a consumer 1.
  • L2, L3 is connected as a Unterbre ⁇ chungselement 2a, 2b, 2c a fuse switch disconnectors.
  • the interruption elements 2a, 2b, 2c have a Fuse 3, which melts at a short circuit or when an overcurrent occurs and in this way the associated interruption elements 2a, 2b, 2c opens.
  • all three fuses 3 have triggered, ie, all three interruption elements 2a, 2b, 2c are open.
  • a rectifier circuit GS is connected to the three phases Ll, L2, L3 of the power supply network SN.
  • the voltage provided by the rectifier GS after corresponding smoothing is provided by a voltage regulator SR (special energy regulator ER) for supplying the electronics E.
  • SR special energy regulator ER
  • Parallel to the voltage regulator SR is a voltage limiter SB, which is preceded by a PTC resistor PTC.
  • the figure thus shows that the voltage limiter SB are connected in parallel to the voltage regulator SR and these two in series with the PTC resistor PTC.
  • the series connection of voltage limiter SB and PTC thermistor PTC is connected to the two outputs Al, A2 of the rectifier circuit GS.
  • Voltage regulator SR occurring overvoltages intercepted by the voltage limiter SB, wherein the series-connected with the voltage limiter SB PTC thermistor PTC heats up strongly and increases its resistance in accordance with the heating. This limits the current through the voltage limiter ⁇ SB and thus the converted power loss, so that the electronics E is effectively protected in this way from surges.

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

L'invention concerne un interrupteur, notamment un interrupteur-sectionneur à fusibles, et un dispositif de protection contre les surtensions destiné à un tel interrupteur et permettant de protéger un consommateur (M), notamment un moteur et un transformateur qui est relié à au moins deux phases (Ll, L2, L3) d'une alimentation en courant électrique (SN), notamment d'un réseau d'alimentation et est protégé d'un courant de court-circuit et/ou d'une surintensité par au moins un élément de coupure (2a, 2b, 2c) monté dans chaque phase (Ll, L2, L3). Ledit interrupteur comprend une électronique (E) qui surveille l'état dudit au moins un élément de coupure (2a, 2b, 2c) et qui est reliée à l'alimentation en courant (SN) par un montage redresseur (GS) et un régulateur d'énergie (ER) aval, notamment un régulateur de tension (SR). L'invention vise à protéger l'électronique contre toute surtension en cas de court-circuit et de surintensité. A cet effet, un limiteur de tension (SR) est monté en tant que dispositif de protection contre les surtensions en parallèle au régulateur d'énergie (ER) et une résistance à coefficient de température positif (CTP) est montée en série au montage parallèle du régulateur d'énergie (ER) et du limiteur de tension (SR).
PCT/EP2008/052837 2007-03-12 2008-03-11 Interrupteur, notamment interrupteur-sectionneur à fusibles, et dispositif de protection contre les surtensions d'un tel interrupteur WO2008110540A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007012687.7 2007-03-12
DE102007012687 2007-03-12

Publications (2)

Publication Number Publication Date
WO2008110540A2 true WO2008110540A2 (fr) 2008-09-18
WO2008110540A3 WO2008110540A3 (fr) 2008-10-30

Family

ID=39691305

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/052837 WO2008110540A2 (fr) 2007-03-12 2008-03-11 Interrupteur, notamment interrupteur-sectionneur à fusibles, et dispositif de protection contre les surtensions d'un tel interrupteur

Country Status (1)

Country Link
WO (1) WO2008110540A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103135023A (zh) * 2011-11-28 2013-06-05 西门子公司 在电力网络中检测短路的方法和装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954037A1 (de) * 1999-10-29 2001-05-03 Siemens Ag Verfahren zum Überwachen der Funktionsfähigkeit eines Bauelementes eines elektrischen Gerätes während des Betriebes
WO2005027295A1 (fr) * 2003-09-11 2005-03-24 Siemens Aktiengesellschaft Procede et ensemble circuit pour surveiller des fusibles montes en amont de disjoncteurs de puissance basse tension

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954037A1 (de) * 1999-10-29 2001-05-03 Siemens Ag Verfahren zum Überwachen der Funktionsfähigkeit eines Bauelementes eines elektrischen Gerätes während des Betriebes
WO2005027295A1 (fr) * 2003-09-11 2005-03-24 Siemens Aktiengesellschaft Procede et ensemble circuit pour surveiller des fusibles montes en amont de disjoncteurs de puissance basse tension

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103135023A (zh) * 2011-11-28 2013-06-05 西门子公司 在电力网络中检测短路的方法和装置

Also Published As

Publication number Publication date
WO2008110540A3 (fr) 2008-10-30

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