EP2733719B1 - Déclencheur auxiliaire de déclenchement d'un disjoncteur - Google Patents

Déclencheur auxiliaire de déclenchement d'un disjoncteur Download PDF

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Publication number
EP2733719B1
EP2733719B1 EP13354038.5A EP13354038A EP2733719B1 EP 2733719 B1 EP2733719 B1 EP 2733719B1 EP 13354038 A EP13354038 A EP 13354038A EP 2733719 B1 EP2733719 B1 EP 2733719B1
Authority
EP
European Patent Office
Prior art keywords
latch
blade
auxiliary
circuit breaker
branch
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.)
Active
Application number
EP13354038.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2733719A1 (fr
Inventor
Mickael Bertrand
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric Industries SAS
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 Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP2733719A1 publication Critical patent/EP2733719A1/fr
Application granted granted Critical
Publication of EP2733719B1 publication Critical patent/EP2733719B1/fr
Active 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
    • H01H71/24—Electromagnetic mechanisms
    • 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
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H2083/205—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition having shunt or UVR tripping device with integrated mechanical energy accumulator
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the invention relates to an auxiliary trigger for being associated with a circuit breaker so as to trigger this circuit breaker, which can be a molded case circuit breaker, for example.
  • a circuit breaker generally includes a circuit breaker control mechanism and a trip bar movable between a latching position and a detent position.
  • the circuit breaker also comprises at least one main trigger, which is able to actuate the trip bar out of its snap position.
  • the circuit breaker control mechanism When the trip bar is in the latching position, the circuit breaker control mechanism is held in a passive state where it is inoperative on the tripped or undocked state of the circuit breaker. If it detects an abnormal electrical condition such as a persistent overcurrent or a short circuit, the main trigger operates the trip bar to the breakout position. The displacement of the trip bar to its disengaged position causes a break in the attachment of the circuit breaker control mechanism which is then released, which leads to a tripping of the circuit breaker, that is to say to its opening.
  • the main release can be supplemented by an auxiliary release which, like this main release, is able to cause a break in the snap of the circuit breaker control mechanism.
  • This auxiliary trigger can thus cause an opening of the circuit breaker independently of the position of the main release.
  • Such auxiliary trigger can be electrically controlled, which can be used in particular to allow remote control of the circuit breaker.
  • auxiliary trigger of a first type which continuously detects the presence or absence of a voltage and which is intended to cause a tripping of the circuit breaker if this voltage disappears or falls below a predetermined threshold.
  • auxiliary trip unit MN triggered by lack of voltage or "auxiliary trip unit MN with no voltage”.
  • auxiliary trigger of a second type which is intended to cause tripping of the circuit breaker if an electric current greater than a predetermined level circulates inside this auxiliary trip unit.
  • Such an auxiliary trigger of the second type is commonly referred to as a "current release trigger MX" or "MX current release”.
  • an energy storage mechanism comprises a pivoting latch designed to retain a pallet in a neutral position, against an elastic return tending to tilt the pallet in a movement causing a trigger circuit breaker.
  • the mechanical strength of the unlocking catch must not be too far from a target value. Indeed, if this behavior is too low, there is a risk of accidental stall leading to inadvertent tripping of the circuit breaker. On the other hand, a too high hold of the unlocking hooking makes the risk of a resistance of the hooking to a stall control, and therefore the risk of a non-trigger in the presence of a command order on the contrary. a tripping of this circuit breaker.
  • the holding of the latching unlocking in the auxiliary triggers described in the document US5,512,720 supra is a function of the balance between two elastic reminders. One of these reminders is exerted on the pallet and tends to tilt this pallet in a tripping movement of the circuit breaker. The other reminder involved in the aforementioned balance is exerted on the lock. It is the fact of a spring provided to return the lock to its locking position during a reset of the auxiliary trigger. Copies This is complicated to manufacture and there are significant variations in properties between such copies.
  • the object of the invention is to facilitate the production management of an auxiliary trigger for tripping a circuit breaker.
  • the lock is configured to be able to receive, from the drive part, a thrust acting in the direction of resetting the lock to its locking position.
  • the figure 1 represents an auxiliary trigger 1 according to the invention, and a polyphase circuit breaker D able to be equipped.
  • the auxiliary trigger 1 is a modular optional equipment which circuit breaker D may or may not be provided.
  • circuit breaker D is more precisely a molded case circuit breaker, still referred to by the acronym DBM (molded case circuit breaker). It may however be otherwise without departing from the scope of the invention.
  • DBM molded case circuit breaker
  • the auxiliary trip unit 1 is shown outside the casing of the circuit breaker D.
  • the arrow F schematizes its implementation in a complementary mounting and coupling housing L, the circuit breaker D comprises to receive this auxiliary trigger 1 operably.
  • the auxiliary trigger 1 is shown alone at the figure 2 . It is more specifically a voltmetric trigger, which comprises a casing 2 of assembly and support fixedly or movably of most other components of the auxiliary trigger 1. Some of these other elements form a mechanism for accumulation of energy, including a drive part 3 associated with a pallet 4 pivotally mounted relative to the housing 2 by means of two opposite bearings 5.
  • the energy storage mechanism also comprises one or more elastic actuating members 6, whose function is to actuate the pallet 4 to an active position and thus cause a tripping of the circuit breaker D.
  • these elastic actuating members 6 are two in number and consist of two traction springs connected in parallel so as to act together in the same direction.
  • the auxiliary trip unit 1 comprises an electromechanical actuating device, which includes an electric coil 7.
  • the auxiliary trip unit 1 also comprises a terminal block 8 supporting two electrical terminals 9 for electrical connection of the coil 7 to unrepresented transmission wires of a online order.
  • the auxiliary trigger 1 is more precisely an auxiliary trigger MN to trigger by lack of voltage.
  • the coil 7 is housed in a support sleeve 11.
  • An axial passage 12 extends longitudinally through the sleeve 11, inside which a fixed core 13 is mounted, as well as a slider comprising a movable core 14 and a pusher 16 fixed rigidly to one another by screwing. This slide is guided to slide in a sliding direction Z-Z '.
  • a compression spring 17 is mounted inside the sheath 11, and is compressed between a shoulder in the fixed core 13 and an end face of the movable core 14. It tends to move the movable core 14 away from the fixed core 13 according to the sliding direction Z-Z '. In other words, the spring 17 forms an elastic return member of the movable core 14 away from the fixed core 13.
  • One end of the pusher 16 protrudes from the movable core 14 so as to form an axially projecting actuating finger. Opposite this actuating finger, a portion of the pusher 16 also protrudes from the movable core 14.
  • the fixed core 13 is traversed by an axial hole through which this portion passes, on which the spring 17 is threaded while being surrounded by the fixed core 13.
  • the axial passage 12 comprises three sections 23, 25 and 26 which succeed each other axially.
  • the section 26 is a median section of smaller diameter interconnecting the sections 23 and 25, which open in two axially opposite directions and which advantageously have the same diameter.
  • the pallet 4 is provided to drive the trigger member 3 for cooperating with a trigger bar to a recess position.
  • a recess of a circuit-breaker control mechanism present in the circuit-breaker D occurs. In a manner known per se, this recess leads to a tripping, and to the opening of the contacts of the circuit breaker. circuit breaker D.
  • the pallet 4 is mounted to tilt around an axis referenced X 1 -X ' 1 .
  • the two traction springs 6 serve to accumulate energy in order to actuate the pallet 4 from its position of the figures 3 and 4 , where the auxiliary trigger 1 is in a neutral armed state.
  • Each spring 6 has two opposite ends, which are bent each to form a hook and which are a fixed anchoring end hooked to a fixed retaining bar 28 and a movable actuating end hooked to a coupling portion 29 from room 4.
  • the pallet 4 comprises a hooking end 30 which is remote from the tilting axis X 1 -X ' 1 , so as to be able to turn about this axis when the pallet 4 is actuated.
  • the energy storage mechanism further comprises a pivoting latch 31, which is carried by a shaft 32 so as to be pivotable about a pivot axis X 2 -X ' 2 substantially parallel to the tilting axis X 1 -X ' 1 .
  • a spring 33 constantly recalls the latch 31 around the pivot axis X 2 -X ' 2 (clockwise on the figures 3 and 4 ).
  • the spring 33 is wound around a bar 34, each end of which is part of one of the bearings 5.
  • Two branches of the spring 33 are permanently resting against the fixed retaining bar 28 which prevents them from tilting around the bar 34 , clockwise to the figure 3 .
  • the latch 31 comprises two branches 40 and 41 angularly offset from one another about the pivot axis X 2 -X ' 2 .
  • the branch 40 is in the path of the pusher 16, which can thus exert on it an actuating thrust of the latch 31 from a locking position to a release position.
  • the branch 40 ends with a pusher 42, which is generally directed towards the part 4 so as to be able to receive an actuating thrust, from this part 4.
  • the latch 31 has a bend 43 whose concavity is turned towards the part 4. Opposite this piece 4, the bend has a protruding back, which defines a receiving zone of a thrust exerted by the pusher 16 at each trigger.
  • the spring 33 comprises an actuating arm 44, through which it acts on the latch 31 by pushing on the branch 40 thereof.
  • the pusher 42 and the elbow 43 together form a hook to which the actuating arm 44 is securely hooked.
  • the branch 41 of the latch 31 forms a gripping finger ending in a gripping head 45 designed to snap the pallet 4 into a neutral position, that is to say in the position of the figure 3 to 5 where the energy storage mechanism is armed.
  • the attachment head 45 has a spout 46 which is the hooking of the piece 4.
  • the spout 46 is generally projecting in a direction A passing through the pivot axis X 2 -X ' 2 . In this way, it has a protruding end 47 where the support of the part 4 is carried out when this part 4 is hooked on the latch 31 in its locking position.
  • the latch 31 has the spout 46
  • the spout 46 is carried by the part 4, in which case it is generally directed in the opposite direction to the pivot axis X 2 -X ' 2 .
  • an electric excitation current constantly travels the coil 7 so that the electromagnetic force generated keeps the movable core 14 against the fixed core 13.
  • the actuating finger formed by an end of the pusher 16 is then at a short distance , called "guard", of the branch 40 of the lock 31.
  • the energy storage mechanism of the auxiliary trigger 1 is armed, insofar as the pallet 4 is hooked to the latch 31 being in its locking position.
  • the latch 31 thus retains the pallet 4 in a neutral position, against a bias exerted by the two springs 6 together.
  • These two springs 6 and store energy able to operate the pallet 4 to an active position.
  • the support of the pallet 4 on the latch 31 is located at the projecting end 47 when the latch 31 performs a locking of the energy storage mechanism in an armed state, as is the case with Figures 3 to 5 . It follows that this lock is stable, unlike a lock resulting from an unlocking hook. A stable snap producing a stable lock is still called a lock. This is a positive snap that is insensitive to variations that may affect different parameters of construction. In other words, a locking latch is safe, without the risk of accidental stall, even in the presence of such variations that may concern the dimensions of the parts and / or position settings and / or the stiffness of the springs.
  • the latch 31 When in its locking position, the latch 31 is subjected to two opposite pairs with respect to the pivot axis X 2 -X ' 2 . Undergoing the pulls of the two springs 6, the pallet 4 exerts a first of these two pairs, at the attachment head 45.
  • the actuating arm 44 exerts the second torque on the latch 31.
  • the force exerted by this actuating arm 44 may be chosen so as to be weak. This force may not intervene in the locking made by the latch 31 because this lock is a result of a stable locking or locking.
  • the compression force of the coil first spring 17 becomes greater than the force of attraction of the movable core 14 towards the fixed core 13.
  • the pusher 16 is then driven towards the branch 40 of the latch 31, until pushing this branch 40 at the back of the elbow 43 and thus bring the latch 31 to pivot to its release position.
  • the figure 7 illustrates the resetting of the energy storage mechanism of the auxiliary trip unit 1, after a trip that has led to the state of the figure 6 .
  • This resetting can be done successfully after the coil 7 has been turned back on.
  • the coil 7 produces an electromagnetic force acting on the movable core 14, in the direction of a return of this movable core to the fixed core 13.
  • This electromagnetic force is lower than that exerted by the spring 17 as long as the movable core 14 is too far away from the fixed core 13.
  • the correct re-energization of the coil 7 is insufficient on its own to effectively return the movable core 14 to the fixed core 13.
  • the resetting of the energy storage mechanism of the auxiliary trip unit MN results from a reset of the circuit breaker D.
  • Such a resetting of the circuit breaker D is the result of a manual actuation of the joystick generating a movement, which is transmitted to the pallet 4 so that it tilts to its neutral position. This happens at the figure 7 , where the tilting of the pallet 4 towards its neutral position is symbolized by the arrow B.
  • the pallet 4 exerts a thrust P towards the fixed core 13, on the pusher 42 of the branch 40, which transmits this push P to the pusher 16 of the slider. Transmitted by the branch 40, the thrust P pushes this slider towards the fixed core 13.
  • the coil 7 consumes a low electrical power to create the force just sufficient to maintain the compressed spring 17, the latter may indeed have a very low stiffness and, despite this, be able to actuate the latch 31, possibly through the guard between the pusher 16 and the latch 31.
  • FIG. figure 2 of the document US5,512,720 An auxiliary trigger of the prior art is shown in FIG. figure 2 of the document US5,512,720 , where a reference 40 designates a support and adjustment piece. A compression spring similar to the spring 17 is compressed between this support and adjustment piece and a movable core similar to the movable core 14.
  • the support piece and adjustment provided in the document US5,512,720 is mounted by screwing inside a fixed core similar to the fixed core 13. With this, one can adjust its axial position relative to the fixed core and thus adjust the restoring force exerted by the compression spring.
  • the fixed core 13 of the auxiliary release 1 may be devoid of a support piece and adjustment to adjust the compression ratio of the spring reminding the movable core 14 away from the fixed core 13. This is the case in the example shown and results in an advantage especially in terms of simplification and cost of production. Another choice consisting in allowing an adjustment of the elastic return of the mobile core 14 can also be done without departing from the scope of the invention.
  • auxiliary trigger according to the invention is designated by the reference 101. It is more specifically an auxiliary trigger MX current triggering.
  • auxiliary trigger MX current triggering In what follows, only what is distinguished from the auxiliary trigger 1 is described.
  • a reference used hereinafter to designate a part of the auxiliary trigger 101 analogous or equivalent to a referenced part of the auxiliary trigger 1 is constructed. by increasing by one hundred (100) the reference identifying this part on the auxiliary trigger 1.
  • auxiliary trigger 101 most of the parts of the auxiliary trigger 101 are identical to the parts of the auxiliary trigger 1. This is the case, for example, fixed cores 13 and 113, as well as moving cores 14 and 114.
  • auxiliary trip units 1 and 101 can also be mounted in the same way in the two auxiliary triggers 1 and 101. This is the case, for example, of housings 2 and 102, pallets 4 and 104, springs 6 and 106, sleeves 11 and 111, pushers 16 and 116, latches 31 and 131, bars 34 and 134, and springs 33 and 133.
  • any of the auxiliary trigger 1 to tripping due to lack of voltage MN and the auxiliary trigger 101 to trigger current emission MX can be indifferently mounted operationally in the additional housing mounting and coupling L of the circuit breaker D, which is still advantageous.
  • the circuit breaker D is able to receive indifferently either the auxiliary trigger 1 triggered by lack of voltage MN, or the auxiliary trigger 101 triggered by current emission MX.
  • a difference between the auxiliary triggers 1 and 101 is that the fixed core 13 is fixedly mounted in the section 23, while the fixed core 113 is fixedly mounted in the section 125.
  • auxiliary releases 1 and 101 Another difference between the auxiliary releases 1 and 101 is that the movable core 14 is axially slidably mounted in the section 25, while the movable core 114 is axially slidably mounted in the section 123.
  • the auxiliary trigger 101 is in a neutral armed state, that is to say in the state where the trigger 1 is at the figure 3 .
  • the auxiliary trigger 101 is in a triggered state, that is to say in the state where the trigger 1 is at the figure 6 .
  • the auxiliary trigger 101 to trigger by current emission MX operates in contrast to the auxiliary trigger 1 in that this auxiliary trigger 101 causes a tripping of the circuit breaker D, when a control electric current greater than a predetermined threshold begins to run the coil 107.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP13354038.5A 2012-11-19 2013-10-14 Déclencheur auxiliaire de déclenchement d'un disjoncteur Active EP2733719B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1203097A FR2998416B1 (fr) 2012-11-19 2012-11-19 Declencheur auxiliaire de declenchement d'un disjoncteur

Publications (2)

Publication Number Publication Date
EP2733719A1 EP2733719A1 (fr) 2014-05-21
EP2733719B1 true EP2733719B1 (fr) 2015-07-01

Family

ID=47739342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13354038.5A Active EP2733719B1 (fr) 2012-11-19 2013-10-14 Déclencheur auxiliaire de déclenchement d'un disjoncteur

Country Status (5)

Country Link
US (1) US9123495B2 (es)
EP (1) EP2733719B1 (es)
CN (1) CN103839734B (es)
ES (1) ES2545065T3 (es)
FR (1) FR2998416B1 (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD800668S1 (en) * 2015-06-23 2017-10-24 Schneider Electric Industries Sas Electrical circuit breaker
USD789894S1 (en) * 2015-06-23 2017-06-20 Schneider Electric Industries Sas Electrical circuit breaker
CN105070611A (zh) * 2015-08-05 2015-11-18 浙江凯发电气股份有限公司 一种漏电断路器的脱扣机构
CN108417465A (zh) * 2018-04-19 2018-08-17 浙江九策智能电气有限公司 一种漏电断路器的脱扣机构

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1432433A (en) * 1918-06-21 1922-10-17 Westinghouse Electric & Mfg Co Latching device
US5343179A (en) 1993-01-29 1994-08-30 Eaton Corporation Miniaturized solenoid operated trip device
FR2704090B1 (fr) * 1993-04-16 1995-06-23 Merlin Gerin Declencheur auxiliaire pour disjoncteur.
US5946179A (en) * 1997-03-25 1999-08-31 Square D Company Electronically controlled circuit breaker with integrated latch tripping
DE102008030822A1 (de) * 2008-06-30 2010-01-07 Robert Seuffer Gmbh & Co. Kg Schaltvorrichtung mit Auslöseeinrichtung

Also Published As

Publication number Publication date
EP2733719A1 (fr) 2014-05-21
ES2545065T3 (es) 2015-09-08
US9123495B2 (en) 2015-09-01
FR2998416B1 (fr) 2015-01-16
US20140139301A1 (en) 2014-05-22
CN103839734A (zh) 2014-06-04
FR2998416A1 (fr) 2014-05-23
CN103839734B (zh) 2017-12-12

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