EP1220258A2 - Zusatzvorrichtung für Niederspannungs-Leistungsschalter - Google Patents

Zusatzvorrichtung für Niederspannungs-Leistungsschalter Download PDF

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Publication number
EP1220258A2
EP1220258A2 EP01204645A EP01204645A EP1220258A2 EP 1220258 A2 EP1220258 A2 EP 1220258A2 EP 01204645 A EP01204645 A EP 01204645A EP 01204645 A EP01204645 A EP 01204645A EP 1220258 A2 EP1220258 A2 EP 1220258A2
Authority
EP
European Patent Office
Prior art keywords
lever
circuit breaker
enclosure
accessory device
coupling
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Withdrawn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
EP01204645A
Other languages
English (en)
French (fr)
Other versions
EP1220258A3 (de
Inventor
Mauro Guerra
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.)
ABB Service SRL
Original Assignee
ABB Service SRL
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 ABB Service SRL filed Critical ABB Service SRL
Publication of EP1220258A2 publication Critical patent/EP1220258A2/de
Publication of EP1220258A3 publication Critical patent/EP1220258A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H01H71/126—Automatic release mechanisms with or without manual release actuated by dismounting of circuit breaker or removal of part of circuit breaker
    • 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
    • H01H2071/0278—Mounting several complete assembled circuit breakers together with at least one of juxtaposed casings dedicated to an auxiliary device, e.g. for undervoltage or shunt trip
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/06—Housings; Casings; Bases; Mountings
    • H01H73/08—Plug-in housings

Definitions

  • the present invention relates to an accessory device for a low-voltage circuit breaker of the draw-out or removable type; more specifically, the expression "low-voltage circuit breaker" is to be understood as referencing a circuit breaker for applications with operating voltages of up to approximately 1000 volts.
  • circuit breakers that are conceived so as to provide performance features that are required in order to ensure the correct operation of the electric circuit in which they are inserted and protect the various users connected thereto against failures or malfunctions that can occur during the normal operating cycle.
  • circuit breakers together with other units possibly associated therewith, such as for example accessory devices used to provide the circuit breaker with additional functions that are auxiliary with respect to the basic ones that are generally performed, are normally used by mounting them on supporting elements, for example DIN guides, and optionally arranging them in appropriate electrical panels or control units.
  • circuit breakers are provided according to various constructive types: among these, one type used in the art is the so-called “draw-out or removable” type.
  • the circuit breaker is provided in two parts: a fixed base part, which is arranged on the supporting element and is provided with terminals for input and output connection to the electric circuit in which the circuit breaker is inserted, and a movable part, which comprises the main contacts of the circuit breaker, contact actuation means, and an actuation lever for resetting the circuit breaker.
  • the two parts are provided with appropriate contact means that allow to electrically and detachably connect the movable part to the fixed part.
  • the aim of the present invention is to provide an accessory device for a low-voltage circuit breaker, of the removable or draw-out type, that allows to ensure that the interventions for separating or coupling the movable part with respect to the fixed part occur in optimum safety conditions even if an operator intervenes without first disarming the circuit breaker.
  • an accessory device for locking the resetting mechanism of a circuit breaker of the draw-out or removable type characterized in that it comprises:
  • the accessory device generally designated by the reference numeral 100, comprises an enclosure 1 that is meant to be connected to the enclosure of a low-voltage circuit breaker of the draw-out or removable type associable therewith, in the manner and for the purposes that will become apparent in detail hereinafter.
  • said circuit breakers of the draw-out or removable type comprise a first part or base 50 and a second movable part 60, which can be mutually electrically coupled/separated.
  • the base 50 has a shaped insulated body 51, which is suitable to be arranged in a fixed position on a supporting element, not shown, for example a DIN-type guide, and is provided with first contact means 52 and with terminals 53 for connection to a power supply circuit; said contact means 52 are advantageously accommodated within the insulating body 51, and except for the opening required to facilitate electrical coupling to the movable part 60, they are surrounded by insulating material.
  • the second part 60 comprises an enclosure 61 that contains, according to solutions that are widely known in the art and therefore are not illustrated in detail, at least one fixed contact and one movable contact that can be mutually coupled/uncoupled, and a mechanism for resetting the circuit breaker itself; in particular, the resetting mechanism comprises actuation means for actuating the movable contact and a resetting lever 62 which protrudes outside the enclosure 61 and is operatively coupled to the actuation means so as to allow manual resetting of the circuit breaker. Furthermore, the base 60 comprises second contact means 63 which protrude outside the enclosure 61 and are suitable to be electrically coupled, in a separable manner, to the first contact means 52.
  • the insulating enclosure 1 which is suitable for connection to the enclosure 61 of the movable part 60 as shown in Figure 5, is realized by means of two mutually coupled half-shells and has a base wall, a top wall, a rear wall, two side walls, and a front wall.
  • the device according to the invention advantageously comprises: an actuating lever 30 which protrudes at least partially outside the insulating enclosure 1, preferably from the rear wall; a kinematic chain, generally designated by the reference numeral 20, which is accommodated inside said insulating enclosure 1 and is operatively coupled to the actuating lever 30; and a lever 10 for coupling to the resetting mechanism of the circuit breaker, which is operatively coupled to the kinematic chain 20 and protrudes at least partially outside the insulating enclosure 1 from one of the two side walls.
  • the coupling lever 10 has a contoured body which is pivoted, at one end, to a pivot 11 of the enclosure 1, and has a first end portion 13 that is suitable to interact operatively with the kinematic chain 20 and at least a portion, for example a pivot (not visible in the Figures), that protrudes transversely outside the enclosure 1, which is suitable for operatively coupling to the resetting mechanism positioned inside the movable part 60 and applying a locking action on it.
  • a spring 14 is operatively associated with the coupling lever 10 and is also positioned on the pivot 11.
  • the actuating lever 30 comprises a shaped body having a first end which is operatively connected to the kinematic chain 20 and a second end 31 that lies opposite the first end and protrudes outside the enclosure 1; said end 31 is suitable to interact with a part of the circuit breaker so as to actuate the chain 20 and cause the coupling lever 10 to release said locking action in the position in which the accessory and the circuit breaker are operatively installed, in the manner which will be described in details hereinafter.
  • the actuating lever 30 has a cantilevered shaped rod-like body in which the second end 31 is substantially T-shaped; notches 34 are furthermore formed in the wings of the T-shaped end 31 and are suitable to facilitate the breakage of said wings.
  • the kinematic chain 20 comprises an interacting lever 21 that is pivoted to a pivot 12 of the enclosure 1, and has a first arm 23 for interacting with the coupling lever 10 and a second arm 24 that is angularly spaced from the first arm 23 and is provided with a shaped end 25; said shaped end 25, which can be optionally colored, when the movable part 60 is coupled to the base 50, is suitable to arrange itself at an opening of the enclosure 1, designated by the reference numeral 2 in Figure 5, and to indicate that the circuit breaker can be reset.
  • the interacting lever 21 has a third arm 22 which is angularly spaced from the first arm 23 and the second arm 24, and is connected to the first end of the actuating lever 30; alternatively, the actuating lever 30 can be coupled directly to the second arm 24, without providing the third arm 22, as shown for example in Figures 1-2.
  • the first end of the lever 31 has a pivot 32 that enters an eye 33 formed in the body of the lever 21.
  • a second spring 26 is associated with the interacting lever 21; in particular, the spring 26 is preferably a spiral spring that acts by traction and has a first end that is connected to a pivot 27 formed on the enclosure 1 and a second end 28 that is anchored to a pivot 29 formed in the body of the interacting lever 21 as shown in Figures 3-4, or in a seat 29 as illustrated instead in Figures 1 and 2.
  • the accessory device 100 is coupled to the movable part 60 of the circuit breaker, coupling the enclosure 1 to the enclosure 61, as shown in Figure 5; in this manner, the pivot of the coupling lever 10 that protrudes from on of the two side walls of the enclosure 1 passes through an appropriate slot formed in the enclosure 61 and couples to the resetting mechanism contained therein, being able to apply a locking action to it.
  • the device 100 is mounted, with reference to a front view of the circuit breaker, to the left of the movable part 60; advantageously, depending on application requirements, the device 100 can also be mounted to the right of the movable part 60; depending on this position, one of the two ends of the T-shaped wing 34 is broken off appropriately so that additional components or devices can be freely mounted next to the device 100.
  • the assembly thus obtained is then coupled to the base 50 of the circuit breaker, which is arranged in a fixed position on a fixing element, for example the DIN guide, with the terminals 53 connected electrically to the electric circuit in which the circuit breaker is inserted.
  • a fixing element for example the DIN guide
  • the length of the actuating lever 30 is such that during the initial step of the coupling between the base 50 and the assembly device 100-fixed part 60, the T-shaped end 34 does not interact with the wall 54 of the base 50 until the contact means 63 are almost fully inserted in the body 51 and are therefore covered by insulating parts; once this condition has been reached, in the final part of the coupling step, in which the contact means 52 are electrically coupled to the contact means 63, the end 31 abuts against the wall 54 and the lever 30 applies a release action and, by virtue of the pivot 32, pushes against the interacting lever 21; by virtue of this thrust, the lever 21 rotates about the pivot 12 and pulls the spring 26.
  • the extraction movement causes the end 31 to no longer be in abutment on the wall 54 already in an initial step of the extraction operation in which the contact means 63 are not yet exposed with respect to the insulating body 51; in this situation, the spring 26 that is subjected to traction pulls the lever 21, which by virtue of the arm 23 pushes against the coupling lever 10 and overcomes the force applied by the spring 14.
  • the lever 10 turns in the direction indicated by the arrow 4 in Figures 2 and 4, moving into a position in which the coupling of its pivot to the resetting mechanism of the circuit breaker and the action of the spring 14 cause the release of the contacts contained in the movable part 60 and prevent actuation of the lever 62, in practice preventing the resetting of the circuit breaker.
  • the accessory device according to the invention fully achieves the intended aim, since it allows to provide interventions in full safety on the circuit breaker; as described above, both during extraction of the movable part from the fixed part and during coupling, the device 100 effectively prevents current from flowing in the circuit breaker if there are exposed live parts and prevents, in such conditions, inappropriate interventions on the lever 62 from causing the resetting of the circuit breaker, thus eliminating or at least reducing considerably the possibility of direct or indirect contact, with consequences that would be extremely dangerous for operators.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Breakers (AREA)
  • Switches With Compound Operations (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Push-Button Switches (AREA)
EP01204645A 2000-12-28 2001-11-29 Zusatzvorrichtung für Niederspannungs-Leistungsschalter Withdrawn EP1220258A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI202852 2000-12-28
ITMI20002852 IT1319717B1 (it) 2000-12-28 2000-12-28 Dispositivo accessorio per interruttore

Publications (2)

Publication Number Publication Date
EP1220258A2 true EP1220258A2 (de) 2002-07-03
EP1220258A3 EP1220258A3 (de) 2004-09-22

Family

ID=11446349

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01204645A Withdrawn EP1220258A3 (de) 2000-12-28 2001-11-29 Zusatzvorrichtung für Niederspannungs-Leistungsschalter

Country Status (5)

Country Link
EP (1) EP1220258A3 (de)
CN (1) CN1237568C (de)
AR (1) AR032054A1 (de)
BR (1) BR0106109A (de)
IT (1) IT1319717B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1638122A1 (de) * 2004-09-20 2006-03-22 ABB Schweiz AG Leitungsschutzschalter mit Polleiteranzeige

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512830A1 (de) * 1995-04-06 1996-10-10 Aeg Niederspannungstech Gmbh Verriegelungsgerät

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3861401B2 (ja) * 1997-09-19 2006-12-20 富士電機機器制御株式会社 回路遮断器

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19512830A1 (de) * 1995-04-06 1996-10-10 Aeg Niederspannungstech Gmbh Verriegelungsgerät

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section EI, Week 199925 Derwent Publications Ltd., London, GB; Class X13, AN 1999-293442 XP002289905 & JP 11 096861 A (FUJI ELECTRIC CO LTD) 9 April 1999 (1999-04-09) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 01, 31 January 1997 (1997-01-31) & JP 8 250008 A (TERASAKI DENKI SANGYO KK), 27 September 1996 (1996-09-27) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1638122A1 (de) * 2004-09-20 2006-03-22 ABB Schweiz AG Leitungsschutzschalter mit Polleiteranzeige

Also Published As

Publication number Publication date
CN1237568C (zh) 2006-01-18
CN1362719A (zh) 2002-08-07
IT1319717B1 (it) 2003-11-03
ITMI20002852A1 (it) 2002-06-28
EP1220258A3 (de) 2004-09-22
BR0106109A (pt) 2002-09-10
AR032054A1 (es) 2003-10-22

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