WO2016181244A1 - Dispositif de sûreté pour empêcher la désactivation et le réarmement non autorisés d'un disjoncteur - Google Patents

Dispositif de sûreté pour empêcher la désactivation et le réarmement non autorisés d'un disjoncteur Download PDF

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Publication number
WO2016181244A1
WO2016181244A1 PCT/IB2016/052298 IB2016052298W WO2016181244A1 WO 2016181244 A1 WO2016181244 A1 WO 2016181244A1 IB 2016052298 W IB2016052298 W IB 2016052298W WO 2016181244 A1 WO2016181244 A1 WO 2016181244A1
Authority
WO
WIPO (PCT)
Prior art keywords
safety device
circuit breaker
core
solenoid
rotatable lever
Prior art date
Application number
PCT/IB2016/052298
Other languages
English (en)
Inventor
Cristiano Picco
Original Assignee
Cristiano Picco
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 Cristiano Picco filed Critical Cristiano Picco
Publication of WO2016181244A1 publication Critical patent/WO2016181244A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • H01H2071/0285—Provisions for an intermediate device between two adjacent circuit breakers having the same general contour but an auxiliary function, e.g. cooling, isolation, wire guiding, magnetic isolation or screening
    • 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
    • H01H71/1009—Interconnected mechanisms

Definitions

  • the present invention relates to a safety device for preventing unauthorized personnel from manually deactivating and resetting electrical equipment, such as circuit breakers and the like.
  • circuit breaker also called an "automatic circuit breaker"
  • a circuit breaker is also used as protection for electrical installations in combination with a differential circuit breaker.
  • circuit breakers are used as isolating switches for electrical power lines.
  • circuit breakers are used in electrical energy measuring devices, in the present case electronic meters. In an electronic meter, the circuit breaker is housed in a container, in order to protect the electrical conductor clamp screws and other exposed parts of said electronic meter. Thus the user has free access to only the deactivation and reset lever of the circuit breaker.
  • the location of the electrical energy measuring device is governed by the UNI CEI EN 16001 standard and subsequent amendments, and by other regulations, which specify that the housing compartments of said electronic meters must be located outside buildings or in boundary walls.
  • the housing compartments may be closed with locks, provided that they are approved by the electrical energy supplier.
  • the electrical energy meters are located in a compartment as near as possible to an entrance, so as to be accessible to the electrical energy supplier at any time and/or in any circumstances.
  • the meters are housed in cabinets, for aesthetic reasons and for personal safety. The cabinets are not always locked shut and inaccessible to unauthorized persons. In other cases, the meters are mounted on a wall without any protection or guards.
  • Access to meters is required for resetting a circuit breaker if it has tripped as a result of an overload or short circuit.
  • a circuit breaker has to be deactivated in order to carry out work on a downstream electrical circuit. According to the correct procedure, action should be taken on said electronic meter only if required by the consumer, thus avoiding the undesirable consequences of an unauthorized deactivation or reset of the circuit breaker. Unauthorized deactivation may cause problems such as the defrosting of food products, the failure of heating systems to switch on in winter, non-operation of medical apparatus, and the like. In less common cases, the electrical energy meter may be deactivated with malicious intent by third parties, to force the consumer to leave his home.
  • Circuit breakers are also used in public electrical installations (apartments, schools, hospitals and other public premises) and industrial installations.
  • the installations comprise distribution boards, located downstream of the electrical energy meter, having the function of supplying electricity to one or more consumers connected thereto, or disconnecting them in case of a fault or for the purpose of maintenance.
  • a need is felt to prevent deliberate or accidental deactivation or resetting by unauthorized personnel.
  • Various systems are available on the market which partly overcome the aforesaid problems, including, for example, external locking systems which use a padlock to secure the actuating lever of a circuit breaker.
  • a padlock may be maliciously removed with a bolt cutter, thus releasing the locking system.
  • These locking systems are bulky, and in some cases do not allow the protective panel to be closed.
  • the object of the present invention is to overcome the problems of the prior art and to provide a safety device capable of preventing the unauthorized manual deactivation and resetting of electrical contacts and electrical equipment, particularly circuit breakers and the like.
  • a safety device for preventing the unauthorized manual deactivation and resetting of a circuit breaker comprises a casing, an electromechanical locking and release system for locking at least one rotatable lever for actuating the electrical contacts of said circuit breaker, an electrical contact for activating the electromechanical system, and an electronic activating device.
  • the casing can be fastened to a circuit breaker by means of at least one fastening element.
  • the electromechanical locking and release system comprises a solenoid, a core, a rotatable lever and at least one fastening element capable of rotationally fixing the rotatable lever of the safety device to the rotatable lever (or levers) of the circuit breaker.
  • the electrical contact can be actuated by a mechanism of the adjacent circuit breaker.
  • the electronic activating device comprises an electronic coding input device for activating the electromechanical system, and a socket mounted on the casing to receive the electronic coding input device.
  • - Fig. 1 is a perspective view of a safety device combined with a circuit breaker
  • - Fig. 2 and Fig. 3 are perspective views, from different angles, of the safety device of Fig. 1 ;
  • Fig. 4 and Fig. 5 are, respectively, an axonometric view and a side view of the safety device, shown in an open state to illustrate the components inside it;
  • Fig. 6 and Fig. 7 are two perspective views of the safety device, shown in an open state, and of an associated circuit breaker, in the deactivated and reset operating condition respectively;
  • Fig. 8 is a perspective view of a detail of the safety device according to a possible variant of the invention.
  • FIG. 9 is a perspective view of a locking and release system forming part of the safety device, in a deactivated operating condition
  • FIG. 10 is a perspective view of the locking and release system of Fig. 9 in a reset operating condition
  • Fig. 1 1 is a sectional perspective view of the locking and release system of Fig. 9;
  • FIG. 12 is a perspective view of an open safety device from which some internal components have been removed for illustrative purposes;
  • - Fig. 13 and Fig. 14 are, respectively, a side view and a perspective view of a safety device in which some internal components are placed in different positions from those in the examples of Fig. 4 and Fig. 5.
  • the number 1 indicates the whole of a safety device associated with a piece of electrical equipment 2, in this example a circuit breaker 2.
  • the safety device 1 serves to prevent the manual deactivation and resetting of the equipment 2 by unauthorized personnel.
  • the circuit breaker 2 of conventional modular design, is of the multi-pole type formed by a plurality of single-pole circuit breakers 21.
  • Each single-pole circuit breaker 21 has a conventional lever 22, rotatable about a horizontal axis, for actuating electrical contacts inside the circuit breaker 2.
  • the safety device 1 is configured to be mounted adjacent to the circuit breaker 2.
  • the safety device 1 comprises a casing 1 1 which preferably has a shape and dimensions compatible with or similar to those of a single-pole circuit breaker 21.
  • the casing 1 1 has a rear mounting recess or seat 1 12 for attaching the safety device 1 to a conventional DIN guide (not shown).
  • the safety device 1 may have different shapes and dimensions from those illustrated herein, and may have attachment formations or seats which are different, or differently positioned, from those illustrated in this example.
  • front indicates a part of the safety device facing a user standing in front of the safety device
  • rear indicates a part facing a wall on which the safety device is installed.
  • the safety device 1 can be secured mechanically to the circuit breaker 2 by a horizontal upper connecting bar 1 1 1.
  • the connecting bar 1 1 1 may be of plastic material.
  • the upper connecting bar 1 1 1 may have a series of mechanical attachments 162.
  • the upper connecting bar 1 1 1 has a series of electrical connections 161 for drawing current from the mains, upstream of the circuit breaker 2, to supply the safety device 1.
  • the safety device 1 comprises a lever 123, rotatable about a horizontal axis, and at least partially projecting or accessible from one side, defined here as the front side, of the safety device.
  • At least one fastening element 124 preferably in the form of a horizontal bar, fixes the lever 123 rotationally to the lever (or levers) 22 for actuating the circuit breaker 2.
  • the fastening element 124 is a bar with a C-shaped cross section, mounted on the end of the lever 123 of the safety device 1 and on the end of the lever (or levers) 22 of the circuit breaker 2.
  • the fastening element 124 may be configured as a bar or shaft 125 passing through holes made in the levers 123 and 22.
  • the fastening elements 124 and/or 125 serve, in the first place, to fix the levers 123 and 22 to one another rotationally, and, in the second place, to keep the safety device 1 fastened to the circuit breaker 2.
  • the safety device 1 comprises an electromechanical system 12 for selectively locking or releasing the lever (or levers) 22 for actuating the electrical contacts of the circuit breaker 2 in two fixed angular positions.
  • the electromechanical locking and release system 12 comprises the lever 123, a solenoid 121 and a core 122 translatable inside the solenoid 121.
  • the lever 123 has a cylindrical hub 1231 in which a first and a second radial hole 1232 and 1233 are formed in positions spaced apart angularly.
  • the holes 1232 and 1233 can be engaged, selectively and alternatively, by a front end of the core 122 when the latter is in a frontally extended or displaced position, following the de-energizing of the solenoid 121.
  • the core 122 is received slidably in a cylindrical chamber 1265 formed in a central tubular portion 1264 of a support and guide body 1263 which is used for mounting the solenoid 121 in the safety device 1 and for housing and guiding the core 122.
  • the solenoid 121 is mounted on the radially outer part of the body 1263.
  • the solenoid 121 is supplied with electricity by means of electrical connections 164 running from an electronic circuit board 16, as described below.
  • the support and guide body 1263 may have a front plate 1261 fixed to the front part of the body 1263.
  • the front plate 1261 has a through hole 1262 aligned with the cylindrical chamber 1265.
  • a guide and reinforcement element 1 13, fixed to the casing 1 1 serves to prevent the outer or front part of the core 122, which projects from the body 1263, from being bent if any attempt is made to force the rotation of the lever 123 and/or the lever (or levers) 22 when the core 122 engages one of the holes 1232 and 1233.
  • the guide and reinforcement , element 1 13 may optionally be a rigid element, of plastic material or metal for example, applied to the casing 1 1 of the safety device 1, by gluing for example.
  • the guide and reinforcement element 1 13 may be formed as one piece co-moulded or moulded with the casing 1 1 (Fig. 12).
  • the cylindrical chamber 1265 has a rear shoulder 1266 serving as an opposing wall for a spring 127 interposed between the shoulder 1266 and the rear end of the core 122.
  • the spring 127 tends to push the core 122 into an extended or front position, towards the lever 123, in order to engage one of the holes 1232 or 1233 and keep the lever 123 angularly locked.
  • the casing 1 1 has a side wall 1 14 in which an opening 1 15 is formed, preferably in the form of a curved slot, which allows the passage of an activating pin 23 forming part of a (known) mechanism of the circuit breaker 2 adjacent to the safety device 1.
  • An electrical contact 15 is positioned in the casing 1 1 , near the opening 1 15, for activating the electromechanical system 12, as described below.
  • the electrical contact 15 is electrically connected to an electronic circuit board 16, which is supplied with electricity from one of the electrical connections 161 branching from the connecting bar 1 1 1.
  • the electrical contact 15 may be a strip contact (Fig. 5).
  • the electrical contact 15 may comprise a reed or a magnetoresistor, or a Hall effect sensor, associated for operation with a magnet (not shown) mounted on the pin 23.
  • the electrical contact 15 may comprise a microswitch (Fig. 13). The choice of the type of electrical contact 15 is not to be considered as limiting.
  • the safety device 1 is also provided with an electronic activating device 14, comprising a socket 141 for the insertion of an electronic key 142 adapted to enable the actuation of the locking and release system 12, and consequently to enable the deactivation and/or resetting of the circuit breaker 2.
  • the socket 141 is connected electrically to the electronic circuit board 16, and comprises a decoding circuit board 141 1 for reading the electronic key 142.
  • the decoding circuit board 141 1 stores one or more user codes for the activation of the electromechanical system 12 for locking and release 12. At least one of these user activation codes is also stored in the electronic key 142.
  • the electronic key 142 may store, in addition to the user code, a further code with a skeleton key function.
  • the casing 1 1 may have at least one indicator lamp 13, connected electrically to the electronic circuit board 16.
  • the lamp 13 can signal to the user at least one operating condition, such as the release of the lever (or levers) 22 of the circuit breaker 2.
  • the decoding circuit board 141 1 reads the electronic key 142, recognizes an activation code of the locking and release system 12, and sends an electrical enabling signal to the electronic circuit board 16.
  • the electronic circuit board 16 starts to supply power to the solenoid 121 which, when energized, pulls the core 122 backwards, compressing the spring 127.
  • the core 122 becomes disengaged from the hole 1233 and releases the lever 123.
  • the electronic circuit board 16 can then cause the indicator lamp 13 to light.
  • the indicator lamp 13 informs the user that the safety device 1 is released, and therefore the circuit breaker 2 can be switched to a condition of deactivation of the electrical contacts.
  • the lever (or levers) 22 are lowered to the deactivation position, the lever 123 has its first hole 1232 aligned with the core 122.
  • the electronic circuit board 16 supplies power to the solenoid 121, which retains the core 122 in the retracted position, di sengaging the 1 ever 123.
  • the pin 23 When the circuit breaker 2 is automatically tripped, because of an overload for example, the pin 23 instantly activates the electrical contact 15. This contact sends an electrical enabling signal to the electronic circuit board 16.
  • the electronic circuit board 16 supplies power to the solenoid 121 which, when energized, pulls the core 122 backwards, compressing the spring 127.
  • the core 122 becomes disengaged from the second hole 1233 and immediately releases the lever 123 and the lever (or levers) 22 of the circuit breaker 2, which are free to jump downwards together into the deactivation position.
  • the electronic circuit board 16 is designed to stop the supply of current to the solenoid 121 after a predetermined time interval, of a few seconds for example.
  • the lever 123 In the lowered deactivation position, the lever 123 has its first hole 1232 aligned with the core 122.
  • the solenoid 121 ceases to be supplied with power, the core 122 is free to be pushed forwards by the spring 127; the front end of the core 122 is inserted into the first hole 1232, locking the lever 123 and therefore the lever (or levers) 22 in the lowered angular position of deactivation.
  • the electronic key 142 In order to reset the circuit breaker 2, the electronic key 142 must be inserted into the socket 141.
  • the decoding circuit board 141 1 reads the electronic key 142, recognizes an activation code of the locking and release system 12, and sends an electrical enabling signal to the electronic circuit board 16.
  • the electronic circuit board 16 supplies power to the solenoid 121 which, when energized, pulls the core 122 backwards, compressing the spring 127.
  • the core 122 becomes disengaged from the first hole 1232 and from the lever 123.
  • the electronic circuit board 16 can then cause the indicator lamp 13 to light.
  • the indicator lamp 13 informs the user that the safety device 1 is released, and therefore the circuit breaker 2 can be switched to a condition in which the electrical contacts are reset.
  • the levers 123 and 22 can be raised manually.
  • the electronic circuit board 16 cuts off the power supply to the solenoid 121 after a few seconds.
  • the lever 23 has its second hole 1233 aligned with the core 122.
  • the solenoid 121 ceases to be supplied with power
  • the core 122 is free to be pushed forwards by the spring 127; the front end of the core 122 is inserted into the second hole 1233, locking the lever 123 and therefore the lever (or levers) 22 in the raised angular reset position.
  • the indicator lamp 13 is switched off after a few seconds, indicating that the circuit breaker 2 has again been locked.
  • Fig.13 and Fig.14 show an embodiment of the safety device 1 in which the electronic circuit board 16 is located in a lower position in the casing 1, and the various electrical connections are therefore different from those in the configuration of Fig. 4.
  • the safety device may be adapted for installation on the right-hand side (as in the examples illustrated here) or on the left-hand side of a circuit breaker.

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  • Control Of Combustion (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un dispositif (1) de sûreté pouvant être fixé à un disjoncteur (2) et doté d'un système électromécanique (12) destiné à verrouiller et à libérer un levier pivotant (22) servant à actionner les contacts électriques du disjoncteur (2). Le système électromécanique comporte un solénoïde (121), un noyau (122), un levier pivotant (123), et un élément (124) de fixation qui solidarise en rotation le levier pivotant (123) du dispositif (1) de sûreté avec le levier pivotant (22) du disjoncteur (2). Un contact électrique (15) peut être actionné par un mécanisme (23) du disjoncteur (2) pour l'activation du système électromécanique (12). Le dispositif (1) de sûreté est muni d'un dispositif électronique (14) d'activation doté d'un dispositif électronique (142) d'entrée de codage servant à activer le système électromécanique (12), et d'un réceptacle (141) servant à recevoir le dispositif électronique (142) d'entrée de codage.
PCT/IB2016/052298 2015-05-13 2016-04-22 Dispositif de sûreté pour empêcher la désactivation et le réarmement non autorisés d'un disjoncteur WO2016181244A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITCN2015A000009 2015-05-13
ITCN2015A000009A ITCN20150009A1 (it) 2015-05-13 2015-05-13 Dispositivo di sicurezza per il disarmo ed il riarmo manuale di un interruttore magnetotermico

Publications (1)

Publication Number Publication Date
WO2016181244A1 true WO2016181244A1 (fr) 2016-11-17

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PCT/IB2016/052298 WO2016181244A1 (fr) 2015-05-13 2016-04-22 Dispositif de sûreté pour empêcher la désactivation et le réarmement non autorisés d'un disjoncteur

Country Status (2)

Country Link
IT (1) ITCN20150009A1 (fr)
WO (1) WO2016181244A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112713063A (zh) * 2020-12-25 2021-04-27 广东电网有限责任公司 防误触机构和断路器
WO2021121668A3 (fr) * 2019-12-20 2021-07-29 Eaton Intelligent Power Limited Interrupteurs de circuit pourvus de systèmes de verrouillage et d'étiquetage à commande électronique et systèmes et procédés de distribution électrique associés
US20230060944A1 (en) * 2021-08-31 2023-03-02 Schneider Electric It Corporation Power distribution system and method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209712A1 (fr) * 2000-11-21 2002-05-29 Hager Electro S.A. Dispositif de commande à distance pour appareillage modulaire de protection
FR2840449A1 (fr) * 2002-05-30 2003-12-05 Hager Electro Sas Dispositif de rearmement automatique pour appareillage modulaire de protection a commander
EP1630836A1 (fr) * 2004-08-25 2006-03-01 EATON Corporation Dispositif de verrouillage d'un arbre de déclenchement et appareil de commutation électrique l'utilisant
US20120326814A1 (en) * 2011-06-27 2012-12-27 Schneider Electric Industries Sas Electric Protection Apparatus Comprising at Least One Breaking Module Controlled by a Control Device With Electromagnetic Coil
EP2645393A1 (fr) * 2012-03-30 2013-10-02 Idem Safety Switches Limited Commutateur de sécurité à double inviolabilité

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209712A1 (fr) * 2000-11-21 2002-05-29 Hager Electro S.A. Dispositif de commande à distance pour appareillage modulaire de protection
FR2840449A1 (fr) * 2002-05-30 2003-12-05 Hager Electro Sas Dispositif de rearmement automatique pour appareillage modulaire de protection a commander
EP1630836A1 (fr) * 2004-08-25 2006-03-01 EATON Corporation Dispositif de verrouillage d'un arbre de déclenchement et appareil de commutation électrique l'utilisant
US20120326814A1 (en) * 2011-06-27 2012-12-27 Schneider Electric Industries Sas Electric Protection Apparatus Comprising at Least One Breaking Module Controlled by a Control Device With Electromagnetic Coil
EP2645393A1 (fr) * 2012-03-30 2013-10-02 Idem Safety Switches Limited Commutateur de sécurité à double inviolabilité

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021121668A3 (fr) * 2019-12-20 2021-07-29 Eaton Intelligent Power Limited Interrupteurs de circuit pourvus de systèmes de verrouillage et d'étiquetage à commande électronique et systèmes et procédés de distribution électrique associés
US11342728B2 (en) 2019-12-20 2022-05-24 Eaton Intelligent Power Limited Circuit interrupters with electronically controlled lock out tag out systems and related electrical distribution systems and methods
US11715936B2 (en) 2019-12-20 2023-08-01 Eaton Intelligent Power Limited Circuit interrupters with electronically controlled lock out tag out systems and related electrical distribution systems and methods
CN112713063A (zh) * 2020-12-25 2021-04-27 广东电网有限责任公司 防误触机构和断路器
US20230060944A1 (en) * 2021-08-31 2023-03-02 Schneider Electric It Corporation Power distribution system and method
US11682883B2 (en) * 2021-08-31 2023-06-20 Schneider Electric It Corporation Power distribution system and method

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