FR2559616A1 - AUXILIARY BLOCK FOR REMOTELY CONTROLLING AN ELECTRICAL CIRCUIT BREAKER - Google Patents

Abstract

1. Remote controlled low-voltage circuit breaker constituted by the association of an auxiliary remote opening and closing control block (10) connected with a circuit breaker main block (12) comprising a mechanism with a manual control handle and with an automatic fault trip device, said auxiliary block comprising : - a first remote opening electromagnet associated to a mechanical control link with the circuit breaker main block in order to transmit a trip order of said first electromagnet to the trip device of the mechanism, - a second remote closing electromagnet (34), the movable core (42) of which is connected with the mechanism of the main block by a movement transformation cinematic chain (46), - connecting terminals (22) of the remote control for the supply of said electromagnets, - and an interlock device (74) for the electrical and mechanical locking of the circuit breaker in open position, characterized by the fact that said cinematic chain comprises a transmission system (46) by cable (48) or belt, coupled between the movable core (42) and a drum (50) driving the handle (18) towards the stationary closing position of the circuit breaker when the control coil (36) of the closing electromagnet (34) is energized, and that the drum (50) cooperates with an elastic pull-off means (70) in order to pull back the movable core (42) into the separated position after de-energization of said coil (36).

Description

AUXILIARY REMOTE CONTROL BLOCK OF A CIRCUIT BREAKER

ELECTRIC.

  The invention relates to a low-voltage remote-controlled circuit breaker formed by the combination of an auxiliary remote opening and closing control unit, coupled

  to a main breaker block having a mechanical mechanism

  net manual control and auto-fault trigger, said auxiliary block comprising: - a first remote-opening electromagnet associated with a mechanical control link with the main circuit breaker block to transmit a tripping order of said first electromagnet to the trigger of the mechanism, - a second Q! ectroAmant closing remote whose 13 the movable core is connected to the mechanism of the main block by a kinematic chain of motion transformation, a connection terminal block of the remote control for the supply of said electromagnets, and a lockout device for locking

  electrical and mechanical circuit breaker in open position.

  This modular technique of assembling the auxiliary block

  Remote control at the side of a block

  The main designer imposes manufacturing and design constraints to house the various elements in a given space given by the dimensions of the cabinet.

  each block. There is one einematic chain using an

  Jage complicated to transmit the closing order

  from the second electromagnet to the disjunct block mechanism

  is not suitable for this type of modular apparatus.

  Your present invention aims at perfecting the reality

  the closing level of the auxiliary block of

eommainde. distance from the circuit breaker.

  The disjoneteur têlée ordered according to the invention is caraeté-

  owing to the fact that said driveline comprises a coupled cable or belt transmission system

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  between the moving core and a drive drum of

  the handle towards the stable position of closing the disjunc-

  during the excitation of the control coil of the closing electromagnet, and that the drum cooperates with an elastic return means to return the movable core in the separated position after de-excitation of said coil.

  The use of a simple direct cable transmission

  implementation of the closure stage whose structure

  flat ture meets the requirements of congestion. No auxiliary return spring is required at the closing electromagnet, since the elastic means of the drum automatically returns the moving core.

  in the spread position via the cable.

  The drum is pivotally mounted on a fixed axis extending

  orthogonally to the moving direction of the moving core. The middle part of the system cable

  transmission passes over a return roller

  part of a tensioner. A set screw adjusts the relative position of the tensioner relative to the movable core

and the drum.

  The elastic return means comprises a torsion spring

  threaded on the axis of the drum to solicit this

  deny to an inactive position allowing a command

  Local manual of the circuit breaker handle.

  According to a development of the invention, the main circuit breaker unit has a multipolar structure comprising a stack of poles whose handles are coupled

  mechanically between them by means of a common bar.

  The latter is advantageously secured to an intermediate lever which reproduces at every moment the exact position of the joysticks. The lever is pivotally mounted on the axis of the drum, the latter being arranged to unidirectionally drive the intermediate lever in the closing direction during the excitation of the coil, and to return to the inactive position after de-excitation of the coil. Other benefits and features will come out more

  clearly from the following description of a mode of

  implementation of the invention, given by way of non-limiting example and shown in the accompanying drawings, in which:

  FIG. 1 is a diagrammatic elevational view of

  torn off a remote control circuit breaker according to the invention; FIGS. 2 and 3 show transverse and longitudinal sections of the auxiliary block closure stage

remote control.

  In the figures, an electric remote control auxiliary unit is snap-fastened to a side face of a standard circuit breaker main block 12 to form a remote-controlled three-pole circuit breaker with a molded casing designed to provide remote opening and closing control.

  the protection of a low voltage distribution circuit.

  The protection function, especially against overloads and

  short circuits, is provided by a magnetic trigger

  tothermic located in each pole R, S, T of the circuit breaker block 12, which can be of the type described in the French patent tH 2,350,680. Each pole R, S, T has a pair of terminals 14, 16 connection, separable contacts (no

  represented) and an actuating mechanism (not shown

  tee) of the movable contact between the open and the closed positions. The mechanism cooperates with a joystick 18 of manual control with two stable positions, and with the

  Magnetothermic trigger for automatic tripping

  in case of overload or short circuit. The handles S15 of the various plates R, S, T of the circuit-breaker block 12 are mechanically coupled together by means of a

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  common strip 20, described for example in the patents

  French Nos. 2,494,031 and 2,414,784.

  The open-close control function is performed by the remote control unit 10 equipped with one or two terminal blocks 22 for external connection. The outline of the box 21 of the remote control unit 10 corresponds to that

  circuit breaker block 12 to form after assembly a

  seems monobloc. The assembly of the two modular housings

  blocks 10, 12 intervene by means of a device

  ratcheting described in French Patent No. 2,411,329. The

  side face 24 (FIG 3) of the box 21 of the telecommunication block.

  command 10 has an attachment element 26 of the arrangement

  snap-fastening device, centering studs 28 fitting into conjugate housings of the T-box casing in the contiguous position of the blocks 10, 12, and means 30, 32 for transmitting the triggering movement between the two blocks 10, 12. The transmission means 30, 32 form a first and a second mechanical control link between the mechanism of the circuit breaker block 12 and the opening stage of the remote control block 10. The stage

  of the latter is not part of the invention.

  tion and will not be described later.

  The closing stage of the remote control unit 10 comprises a closing electromagnet 34 (FIG 2 and 3)

  36 control surrounded by a ferromagnetic yoke 38.

  The tubular coil 36 is mounted coaxially on a furnace

  insulating water 40 inside which is arranged a sliding mobile core 42 cooperating by magnetic attraction

  with a fixed core 44 secured to the bolt 38. The elec-

  3-magnet 34 rests on the bottom of boltier 21, and the former

  active tremity 45 of the movable core 42 is connected to the bar

  connecting the shifters 18 of the disjunc-

  12 through a transmission system

46 by flexible cable 48.

  The transmission system 46 includes a link

  unidirectional drum drum 50 with an ex-

  voltage 51 acting on an arm of an intermediate lever 52

  The drum 50 and the intermediate lever 52 are mounted pivotably on a fixed axis 54 arranged in the upper part of the casing.

  21 extending parallel to the bar 20 and orthogonal

  in the direction of movement of the movable core 42. The cable 48 is provided with a tip 56 anchored in a

  clevis 58 pivoting on an auxiliary axis 60 of the drum 50.

  The interamediar part of the cable 48 passes over a roller 62

  deflection member rotatably mounted on an axis 66 of a yoke 64.

  The roller assembly 62 and yoke 64 constitutes a tensioner 65 whose position is adjustable by means of a screw of

setting 68.

  Urn elastic return means urges the drum 50 in a clockwise direction against a stop formed by the

  wall of the housing 21. The elastic means comprises a

  torsion piece 70 threaded on the axis 54, one of the ends

  half of the spring 70 being anchored to the drum 50 and the

  opposite mite taking support on a boss 72 of the box 21.

  The return of the drum 50 to the inactive position is performed automatically after de-energizing the coil 36 of the closing electro-liner 34 and simultaneously causes the return Cu mobile core 42 in the separated position by

  the cable link 48. The layout of the transmission system

  mi.ssion 46 does not require any auxiliary return spring between the fixed 44 and mobile 42 cores of the electromagnet 3S. The internal sink. January 52 follows the bar 20 at the mn-vem; ent opening and closing of the circuit breaker, and reproducre r each moment the exact position of joysticks bCIrC remote control 10 further comprises a c sensing device 74 for the electrical lock and 2r59616

  mechanical circuit breaker in the open position. The disc

  positive padlocking 74 has a slider 76 capable of

  to be moved in a groove 78 located in the upper part of the housing 21 and in the extension of the bar 20. The slide 76 carries a contact system 80 cooperating by sliding with a fixed contact 82 inserted into the electrical supply circuit of

  the electromagnet 34. A compression spring 84

  cite the slide 76 to an unlock position

  (Fig. 3) in which the contacts 80, 82 are closed.

  In the depressed locking position of the slider 76, the contacts 80, 82 are open and prohibit the excitation

  electromagnet 34. The remote closure of the disc

  junction is also mechanically condemned

  cage by the slide 76 of the intermediate lever 52.

  In this position a padlock (not shown) can be inserted into an ear 86 of the slide 76 which

  is locked between two protuberances 88, 90 of the bowl-

tier 21.

  The operation of the remote control circuit breaker is as follows

efore:

  In the absence of an opening or closing order

  tance, the remote control unit 10 is in the rest position. Under the action of the return spring 70, the drum of the transmission system 46 of the closing stage is in the inactive position, shown in phantom in FIG. 2. The cable 48 is biased in the direction of

  arrow F1 and maintains the mobile core 42 of the electronics

  magnet 34 in the separated position. The circuit breaker can be opened and closed manually by the local actuation of

  the bar 20 for coupling the handles 18.

  In the open position of the contacts of the circuit breaker following a trip on fault or a manual opening, the bar 20 is in a stable opening position and the intermediate lever 52 of the transmission system 46 7 2r559616 is supported on the extension 51 of the drum 50. A remote close command can be sent to the terminal 22 of the remote control unit 10, causing the excitation of the coil 36 of the closing electromagnet 34. The mohbile core 42 is attracted (dotted) in FIG 2) against the fixed core 44, and pulls on the cable 48 whose displacement in the direction of the arrow F2 causes the drum 50 to swing from the inactive position to an active position (in dotted line in FIG. 2). The

  the drum 50 is pivoted in the trigonometric direction

  against the return spring 70, so as to drive the intermediate lever 52 and the bar 20 to the closed position of the circuit breaker. In the closed position of the contacts, a reversing contact (not shown) interrupts the supply of the coil 36, and the return spring 70 returns the drum 50 to the inactive position and the movable core 42 to the remote position while the bar 20 remains stationary in the stable position

closure.

  2g In the closed position of the circuit breaker contacts, a remote opening command can be applied to the floor

  opening date. remote control unit 10. The order to open

  Ture is transils in a conventional manner by the means 30, 32 to the trip of the circuit breaker. The closure stage of the block 10 remains at rest during this operation of

  triggered, but can be reactivated as soon as

  Ties are open. ty / vention - it is of course in no way limited to the

  : m..t: more specifically described and

  has been added, but it is well

  :at:. re: any variety remaining within the equiva-

  This electromagnetic system, in particular that in which the transmission system 46 would be replaced, would be replaced by any other flexible transmission of force.

  "1'de = roeture, including a strap, a cour-

f at a time.

8 - 2r59616

Claims (8)

  1. Low-voltage remote-controlled circuit breaker formed by the combination of an auxiliary remote opening and closing control unit coupled to a main block   circuit breaker having a manual joystick mechanism   and an automatic fault trigger, said auxiliary block comprising: a first remote opening electromagnet associated with a mechanical control connection with the main circuit breaker block to transmit a trip command from said first electromagnet to the trip trigger; mechanism, - a second remote locking electromagnet whose movable core is connected to the main block mechanism by a kinematic motion transformation cat, - a terminal block for connecting the remote control for supplying said electromagnets - and a lockout device for the electrical and mechanical locking of the circuit breaker in the open position,   characterized by the fact that said kinematic chain com-   carries a transmission system (46) by cable (48) or belt, coupled between the movable core (42) and a drum (50) driving the handle (18) to the stable position of closure of the circuit breaker when the energizing the control coil (36) of the closing electromagnet (34), and the drum (50) cooperating with an elastic return means to return the movable core (42) to a position   spaced after de-excitation of said coil.   2. Remote-controlled circuit breaker according to claim 1, characterized   characterized in that the movable sliding core (42) is arranged coaxially within the tubular control coil (36) and the drum (50) is mounted   pivoting on a fixed axis (54) extending orthogonal-   to the moving direction of the movable core (42).   3. Remote controlled circuit breaker according to claim 2, characterized   characterized by the fact that the middle part of the cable 2'59616   (48) of the transmission system (46) passes over a deflection roller (62) forming part of a tensioner (65), and a set screw (68) adjusts the relative position   the tensioner (65) relative to the movable core (42) and the drum   bour (50). 4. Remote controlled circuit breaker according to claim 2 or 3, characterized in that the elastic return means comprises a torsion spring (70) threaded on the axis (54).   drum (50) to bias the drum towards a position   inactive enabling a local manual control of the circuit breaker handle.   5. Remote control circuit breaker according to one of the claims   1 to 4, characterized by the fact that, unlike the modern core,   bile (42), the cable (48) has a tip (56)   in a clevis (58) pivoting on an axis (60) to of the drum (50).   6. Multipole RCB according to one of the   Claims 1 to 5, wherein the joysticks   juxtaposed parts of the main circuit breaker block are   mechanically connected to each other by means of a bar-   common ruler, characterized in that the bar (20)   is secured to an intermediate lever (52) which reproduces   at each moment the exact position of the levers (18), and that said lever (52) is pivotally mounted on the axis   (54) of the drum (50), the latter being arranged to drive   her un.directionally the intermediate lever (52)   in the closing direction when the excitation of the   (3) j and return to the inactive position after excit.ation of the coil {36).   7. Remote controlled circuit breaker according to claim 6,   raci: terérised in that the strip (20) for coupling the levers (18) extends parallel to the axis (54) of pivote.ment of the drum (50) and the intermediate lever (52),   and è the axis (66) of the roller (62) for returning the cable (48).   8. Circuit breaker according to one of the claims   1 to 7, characterized in that the device-cade-   basket (74) has a lockable slide (76)   able to block the drum (50) in the inactive position and to condemn the supply of the coil (36) of   the closing electromagnet (34).