WO2023161250A1 - Dispositif de protection électrique comprenant un module de mesure - Google Patents

Dispositif de protection électrique comprenant un module de mesure Download PDF

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Publication number
WO2023161250A1
WO2023161250A1 PCT/EP2023/054373 EP2023054373W WO2023161250A1 WO 2023161250 A1 WO2023161250 A1 WO 2023161250A1 EP 2023054373 W EP2023054373 W EP 2023054373W WO 2023161250 A1 WO2023161250 A1 WO 2023161250A1
Authority
WO
WIPO (PCT)
Prior art keywords
measuring module
electrical
fuse
protective device
sensor
Prior art date
Application number
PCT/EP2023/054373
Other languages
German (de)
English (en)
Inventor
Gerhard Grosse-Holz
Jürgen Reich
Hans Dieter Storzer
Simon Brose
Original Assignee
EBG innolab GmbH
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 EBG innolab GmbH filed Critical EBG innolab GmbH
Publication of WO2023161250A1 publication Critical patent/WO2023161250A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/12—Adaptation for built-in fuse
    • H01H31/122—Fuses mounted on, or constituting the movable contact parts of, the switch
    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0062—Testing or measuring non-electrical properties of switches, e.g. contact velocity
    • H01H2011/0068—Testing or measuring non-electrical properties of switches, e.g. contact velocity measuring the temperature of the switch or parts thereof
    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H01H2085/0266—Structural association with a measurement device, e.g. a shunt
    • 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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H01H2085/0291—Structural association with a current transformer

Definitions

  • the present invention relates to an electrical protective device, in particular in the form of a fuse strip, with at least one receiving space for a fuse, which has at least one, in particular two, fuse blades for making electrical contact with at least one permanently installed contact of the electrical protective device, with each fuse being assigned a cover and the cover has a window-like opening which can be closed in particular by means of a closure element, the opening being arranged in such a way that one of the safety knives can be electrically contacted through it.
  • sensors that can only detect alternating currents and those that can detect direct and alternating currents.
  • AC sensors are referred to as current transformers in the narrower sense. They usually consist of a ring core and are designed like a transformer.
  • the alternating magnetic field of a conductor through which the alternating current to be measured flows induces an alternating current in the measuring coil which is proportional to the measuring current via the reciprocal turns ratio.
  • direct current sensors can also detect alternating currents and transient processes.
  • the current transformers described above are built correspondingly large and can usually be retrofitted only with difficulty without removing covers or housing parts of the respective electrical device.
  • Electrical devices of this type in particular in the form of fuse strips in cable distribution cabinets, can usually not be retrofitted with appropriate current measuring devices during ongoing operation.
  • Figures 1a and 1b show from DE 10 2017 011 374 previously known electrical (current) measuring devices 5 for low-voltage fuse strips 1, which have electrical fuses for each electrical phase, which are each arranged behind covers 2.
  • the electrical measuring device 5 is arranged in the housing 4a of the fuse strip 1.
  • a disadvantage of these embodiments is that the fuse strip must first be switched off before the measuring device can be mounted and connected.
  • a protective device of the type mentioned is known, for example, from European patent application EP 1 058 283 A2 and German published application DE 199 13 017 A1.
  • Newly installed low-voltage switchgear within the electrical energy supply or industrial plants, are increasingly equipped with appropriate measuring technology for recording electrical variables in addition to the protective devices. It is about low-voltage switchgear that is equipped for selective line protection with, for example, NH fuse switch disconnectors or NH fuse switch-disconnectors that use fuses of the so-called low-voltage, high-performance (NH) type according to DIN 43620/1 (also in English). "Square body fuse” called). These have a body with a rectangular cross section from which a solid, flat blade contact protrudes on opposite sides, which can be inserted into a corresponding receptacle in the base body of the protective device. The fuses are therefore also referred to as fuse inserts.
  • DE 199 13 017 A1 discloses the integration of measuring devices or similar systems in or on the pivotable flaps of such protective devices, each carrying a fuse link. By pivoting a flap, the fuse link with its blade contacts is inserted into the corresponding receptacles in the base body. The flap thus covers the space in which the NH fuse is located.
  • a transformer load disconnector differs from typical NH fuse load disconnectors in that a current transformer is integrated into the disconnector.
  • DE 10 2007 051 419 A1 discloses one LV HRC fuse switch disconnector, in which a current transformer encompasses a connecting element that is attached to the back of the disconnector at its base and connects the receptacle of a blade contact to the busbar.
  • current transformers are already integrated during production of the strip, in that the strip is designed in such a way that a current transformer can be plugged onto the blade contact receptacles, as is described in the application EP 2 546 856 A1.
  • LV HRC fuse links the body of which encompasses the fusible conductor has a lower overall height than the LV HRC fuse links designed according to DIN 43620/1. Due to this lower overall height of the body, there is enough space in the lower part of the NH fused safety edge to attach a special current transformer, adapted to this application, to the blade contact of the fuse, which itself has a grip tab and thus a transformer fuse combination with the dimensions of DIN 43620/ 1 forms. This is disclosed, for example, in DE 199 13 017 A1.
  • Patent application EP 1 058 283 A2 offers a solution for detecting and monitoring the voltage within low-voltage switchgear.
  • both a voltage measurement and a differential voltage measurement are carried out via the NH fuse links within an NH fused isolating switch strip in such a way that the voltage taps within the strip take place directly at the receptacles (contact tongues) for the blade contacts of the fuses.
  • the measuring lines are then routed through the lower part of the bar (base body) to a monitoring system that is mounted directly on the bar.
  • a temperature measurement can also be carried out by simply integrating temperature sensors within the housing of the low-voltage switchgear. By distributing different temperature sensors, the temperature of individual areas can also be recorded in a differentiated manner.
  • the measurement value conversion and processing must be taken into account. In the current state of the art, this is usually done by a central device outside the protective device, with all connections from the sensors to the external central device being realized by cables of appropriate length.
  • EP 1 058 283 A2 the measuring lines are connected to a monitoring unit that is installed above an NH fused load switch.
  • the contact terminals are electrically connected to electrical cables, which allows energy to be tapped during operation of the fuse strip.
  • the fuses 13 each have fuse blades 14a, 14b, which make contact with electrical contacts 15a, 15b fixedly arranged in the fuse strip 10 as soon as the fuse 13 is in the fuse strip 10 is introduced by means of the pivotably mounted covers 17.
  • the fuses 13 are arranged one behind the other in the longitudinal extension direction of the fuse strip 10 and are connected to the outlets and busbars of the fuse strip 10 via the electrical contacts 15a, 15b.
  • the object of the present invention is to provide a simple way of retrofitting or equipping an electrical protective device according to the invention, in particular in the form of a fuse strip described, with a current measuring device.
  • the invention is based on the idea of using the so-called "construction power opening" or other existing openings in the cover in order to determine at least one physical variable through this by means of a measuring module.
  • the measuring module according to the invention can also be pushed onto an exposed safety knife.
  • the measuring module according to the invention will at least be designed to determine the electric current flowing through the associated fuse This can be done by means of a Hall sensor or a current transformer, which is part of the measuring module.
  • the measurement module is advantageously designed in such a way that no separate attachment means are required to attach the measurement module to the electrical protective device. It is particularly advantageous if the measuring module is held on the protective device after installation, e.g. by means of a snap-in connection or form fit.
  • the measuring module is advantageously designed to be small and compact, so that it can be accommodated in the installation space of the electrical protective device itself, such that no further modifications to the protective device are required.
  • the measurement module can have a wide variety of sensors for detecting a number of physical quantities.
  • a Hall sensor, current transformer, position sensor, temperature sensor, acceleration sensor, moisture sensor and/or pressure sensor can be provided as sensors.
  • at least the Fuse blade current I and / or the temperature T measured or determined in the receiving space of the fuse or in the area of the fuse blade.
  • one measuring module should be provided for each electrical phase.
  • the measuring modules can be electrically connected to one another and/or to communicate with one another and/or to communicate with one in or on the electrical protective device or in a control cabinet in which the electrical protective device is arranged, or to communicate their data to them send and/or are in electrical connection with it. If they are electrically connected to one another, power can also be tapped off jointly via the phases of the electrical protective device, with which the measuring modules are supplied with power.
  • the measuring modules can also have energy stores, which make them functional even when the protective device is not carrying current. The energy stores can also be of the rechargeable type.
  • the measuring module advantageously has a data processing unit which processes the signal from the at least one sensor.
  • the measurement module can also have a memory, which can be arranged in particular in the data processing unit, which is used to store the determined measurement data.
  • the measuring module has a communication interface, in particular in the form of a radio module, via which the measuring module communicates with a further data processing unit arranged remotely from the measuring module or which transmits the determined data.
  • This further data processing unit can be arranged or integrated on or in the electrical protective device or in a control cabinet in which the electrical protective device is arranged.
  • the measuring module can advantageously have means, in particular an electrical contact, for tapping off energy from the safety knife.
  • means for tapping off energy from the safety knife.
  • two phases of a three-phase network for a voltage tap for the energy supply are used.
  • an electrical connection would have to be provided between at least two measurement modules. If the measuring module is in the form of a current transformer, it does not require any galvanic contact to tap off the energy.
  • the measurement module advantageously has a housing which is designed in such a way that it closes the opening alone or together with the closure element when installed, so that the necessary protection against accidental contact and protection against dirt is provided.
  • the measuring module according to the invention can have at least one leg which extends in the direction of the safety knife and is fastened on or in the housing of the measuring module.
  • a Hall sensor for example, can be arranged on this leg, which is located in the immediate vicinity or next to the safety knife when the measuring module is inserted or installed.
  • the at least one leg can be designed in one or more parts, in particular in two parts, with one leg part being pivotably attached to the other, for example.
  • the leg or legs it is also possible for the leg or legs to be formed from a resilient material and/or to be pivotably mounted on the housing of the measuring module.
  • the legs of the measuring module are designed and their material selection is also adapted to the measuring method used.
  • insulation and/or a distance between the leg(s) and the safety knife should be provided if necessary.
  • the leg can also be made of an electrically and/or magnetically conductive material, which is optionally also encased with a plastic, at least in some areas.
  • electrical connecting lines can be provided along one leg, with which the sensor or sensors are connected to the data processing unit of the measuring module.
  • the measuring module according to the invention can also be designed in such a way that its legs extend on both sides along the safety knife and encompass it, in particular with their free ends touch/contact and form a closed loop around the fuse blade so that the measurement module can form a current transformer.
  • the measuring module can also have at least one interface, in particular in the form of a plug, for the electrical connection to at least one further measuring module or evaluation electronics.
  • the individual measurement modules can be easily wired together.
  • each measuring module it is also possible for each measuring module to be designed with a connecting line with which it can be connected to the other measuring modules and/or an external data processing device.
  • the measuring module has a position sensor, this can advantageously also be used to monitor the switching state of the fuse, since the measuring module also changes its position in space when the fuse is covered.
  • Fig. 2 third embodiment of an electrical protective device according to the prior art with "construction power openings" for each fuse;
  • FIG. 3 shows a detail representation of FIG. 3 without a cover but with a measuring module according to the invention, which is designed as a current transformer;
  • FIG. 5 shows a detail representation of FIG. 3 with a cover and with a mounted measuring module according to the invention according to FIG. 4
  • FIG. 6 shows a detail representation of FIG. 3 with a cover and with a fitted measuring module according to the invention, which has a Hall sensor for current measurement as the sensor;
  • Fig. 7b Measuring module with a Hall sensor and a further sensor for measuring a further physical variable.
  • FIG. 3 shows a detail representation of FIG. 3 without cover 17 but with measuring module 18 according to the invention, which is designed as a current transformer.
  • the measuring module 18 is shown only as a block module and can in reality have a completely different shape and contour.
  • the measuring module 18 has a housing 18a in which, as shown in FIG. 4, a data processing unit 23, optionally also with a memory 24, is arranged. Below the housing 18a, the legs 18s extend in the direction of the safety knife 14b and enclose it with their free ends 18sf, which are connected to one another after the measuring module has been pushed into the opening 17a of the cover 17 from above.
  • the legs 18s are pushed apart by the fuse blade 14b and then spring back towards each other so that their free ends touch and the legs 18s together form a loop around the fuse blade 14b, which is necessary to form a current transformer.
  • the measurement module 18 can transmit either the pure measurement signal or already evaluated or converted data to a remote data processing and evaluation unit.
  • the measuring module can have a communication unit, in particular the data can also be transmitted by radio signal.
  • FIG. 5 shows the embodiment described above with a cover 17 and with a fitted measuring module 18 according to the invention as shown in FIG. 4, with the opening 17a being released by the displaced cover 17b.
  • FIG. 6 shows a further possible embodiment in which the measuring module according to the invention has a Hall sensor for current measurement as the sensor.
  • the measuring module has a Hall sensor for current measurement as the sensor.
  • only one leg 18s is necessary for this, through which the Hall sensor 20 can be placed in the immediate vicinity of the safety knife 14b.
  • the leg 18s can be made shorter.
  • a measuring module 18 with a Hall sensor 20 for current measurement and electrical contacting of the fuse blade 14a is shown in FIG. 7a.
  • the Hall sensor is on the left leg 18s
  • the Hall sensor 20 arranged, wherein the Hall sensor 20 does not come into contact with the fuse blade 14b. This can also be realized by a non-illustrated plastic sheathing of the leg.
  • the second leg 18s' is in electrical contact with the fuse blade 14a, so that the measuring module 18 can be supplied with energy via this contact.
  • FIG. 7b shows a measuring module 18 with a Hall sensor 20, which is arranged on the left leg 18s.
  • a further sensor 21 for measuring a further physical variable, such as the temperature, is arranged on the opposite second leg 18s'.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

L'invention concerne un dispositif de protection électrique (10), en particulier sous la forme d'une bande fusible, comprenant au moins une chambre de réception (12) pour un fusible (13) qui comporte au moins une lame (14a, 14b) de fusible, en particulier deux lames de fusible, permettant la mise en contact électrique d'au moins un contact électrique (15a, 15b) du dispositif de protection électrique (10), ledit contact électrique étant installé de manière fixe. Chaque fusible (13) présente une ouverture de type fenêtre (17a) qui peut être fermée au moyen d'un élément de fermeture (17b), l'ouverture (17a) étant agencée de telle sorte que l'une des lames (14a) de fusible peut être mise en contact électrique à travers l'ouverture. L'invention est caractérisée en ce qu'un module de mesure (18) peut être inséré et/ou enfiché dans l'ouverture (17a).
PCT/EP2023/054373 2022-02-24 2023-02-22 Dispositif de protection électrique comprenant un module de mesure WO2023161250A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022104394.0A DE102022104394A1 (de) 2022-02-24 2022-02-24 Elektrische Schutzeinrichtung mit Messmodul
DE102022104394.0 2022-02-24

Publications (1)

Publication Number Publication Date
WO2023161250A1 true WO2023161250A1 (fr) 2023-08-31

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ID=85328758

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PCT/EP2023/054373 WO2023161250A1 (fr) 2022-02-24 2023-02-22 Dispositif de protection électrique comprenant un module de mesure

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DE (1) DE102022104394A1 (fr)
WO (1) WO2023161250A1 (fr)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1929504A1 (de) * 1969-06-11 1970-12-17 Efen Elektrotech Fab Trennschalter,Lasttrennschalter,Sicherungstrennschalter oder Sicherungslasttrennschalter
DE3411323A1 (de) * 1984-03-28 1985-10-10 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Schaltklappe
DE3639669A1 (de) * 1986-11-20 1988-05-26 Efen Elektrotech Fab Niederspannungs-hochleistungs- sicherungsschaltgeraet mit fensteranordnung
DE19913017A1 (de) 1999-03-23 2000-09-28 Efen Elektrotech Fab Überwachungsgerät in einem Wechselstromkreis
EP1058283A2 (fr) 1999-06-04 2000-12-06 M. Schneider, Schaltgerätebau und Elektroinstallationen Gesellschaft m.b.H. Système de surveillance pour appareils de commutation à basse tension
DE102007051419A1 (de) 2007-10-25 2009-04-30 Efen Gmbh NH-Sicherungslasttrenner mit Stromwandler
EP2259284A2 (fr) 2009-06-04 2010-12-08 EFEN GmbH Unité de convertisseur de courant
US20110163836A1 (en) * 2004-09-13 2011-07-07 Matthew Rain Darr Electronically controlled fusible switching disconnect modules and devices
EP2546856A1 (fr) 2011-07-12 2013-01-16 Jean Müller GmbH Elektrotechnische Fabrik Baguette pour fusibles NH
DE102011052499A1 (de) 2011-08-08 2013-02-14 Tyco Electronics Amp Gmbh Verfahren zur Verbesserung des Übergangswiderstandes in einer elektrischen Verbindung zwischen zwei Kontaktelementen und Bauteil mit einer elektrischen Verbindung zwischen zwei Kontaktelementen
DE102017011374A1 (de) 2017-12-11 2019-06-13 Fachhochschule Südwestfalen Schutzeinrichtung für Niederspannungsanlagen mit integrierter Messelektronik
EP3671785A1 (fr) * 2018-12-19 2020-06-24 Jean Müller GmbH Elektrotechnische Fabrik Agencement d'une partie porteuse et d'une partie supérieure d'un dispositif de commutation doté des composants d'une électronique intégrés dans l'agencement

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1929504A1 (de) * 1969-06-11 1970-12-17 Efen Elektrotech Fab Trennschalter,Lasttrennschalter,Sicherungstrennschalter oder Sicherungslasttrennschalter
DE3411323A1 (de) * 1984-03-28 1985-10-10 Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Schaltklappe
DE3639669A1 (de) * 1986-11-20 1988-05-26 Efen Elektrotech Fab Niederspannungs-hochleistungs- sicherungsschaltgeraet mit fensteranordnung
DE19913017A1 (de) 1999-03-23 2000-09-28 Efen Elektrotech Fab Überwachungsgerät in einem Wechselstromkreis
EP1058283A2 (fr) 1999-06-04 2000-12-06 M. Schneider, Schaltgerätebau und Elektroinstallationen Gesellschaft m.b.H. Système de surveillance pour appareils de commutation à basse tension
US20110163836A1 (en) * 2004-09-13 2011-07-07 Matthew Rain Darr Electronically controlled fusible switching disconnect modules and devices
DE102007051419A1 (de) 2007-10-25 2009-04-30 Efen Gmbh NH-Sicherungslasttrenner mit Stromwandler
EP2259284A2 (fr) 2009-06-04 2010-12-08 EFEN GmbH Unité de convertisseur de courant
EP2546856A1 (fr) 2011-07-12 2013-01-16 Jean Müller GmbH Elektrotechnische Fabrik Baguette pour fusibles NH
DE102011052499A1 (de) 2011-08-08 2013-02-14 Tyco Electronics Amp Gmbh Verfahren zur Verbesserung des Übergangswiderstandes in einer elektrischen Verbindung zwischen zwei Kontaktelementen und Bauteil mit einer elektrischen Verbindung zwischen zwei Kontaktelementen
DE102017011374A1 (de) 2017-12-11 2019-06-13 Fachhochschule Südwestfalen Schutzeinrichtung für Niederspannungsanlagen mit integrierter Messelektronik
EP3671785A1 (fr) * 2018-12-19 2020-06-24 Jean Müller GmbH Elektrotechnische Fabrik Agencement d'une partie porteuse et d'une partie supérieure d'un dispositif de commutation doté des composants d'une électronique intégrés dans l'agencement

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