FR2795860A1 - AUXILIARY SIGNALING MODULE FOR AN ELECTRICAL DEVICE WITH TRIGGER - Google Patents

Abstract

An auxiliary signaling module 10 for an electrical device with a trip unit, in particular a circuit breaker or a differential switch comprises a first OF signaling switch 14 open - closed of the contacts of the device, and a second switch 16 intended to indicate either an OF signaling open-closed switchgear contacts, or an SD signal representative of the armed or tripped state of the switchgear. A signaling lever 58 SD fault signal is mounted on the plate 52 of the mechanism 18, and the movable contact 22 of the second switch 16 is actuated by an intermediate lever 62, which follows the movement of the plate 52 or the signaling lever 58 in function of the setting of a selector 32, respectively for the choice of the OF operating mode open - closed, or SD armed - tripped.

Description

-.f

  AUXILIARY SIGNALING MODULE FOR ELECTRICAL EQUIPMENT

A TRIGGER

  TECHNICAL FIELD OF THE INVENTION The invention relates to an auxiliary signaling module for an electrical device with trip device, in particular a circuit breaker or a differential switch, said module comprising an insulating case containing: - a first switch with movable reversing contact intended for indicate an open OF signaling closed of switchgear contacts, - a second changeover contact switch intended to indicate either an open OF closed signaling of switchgear contacts, or an SD signaling fault signal representative of the armed state, or triggered by the switchgear, - a lever mechanism and rotary plate for actuating the movable contacts of the first and second switches,

  - mechanical connection means for transmitting the open state to the mechanism -

  closed, and the armed state - triggered by the switchgear, and a selector for choosing the operating mode OF or SD of the second switch. State of the art The document EP147605 relates to an auxiliary switchable signaling unit, one of the reversing switches of which can be locked in the latching position by means of a stop pawl cooperating with the control lever, which crosses the front face of the housing. A selector limits the pivoting area of the

stop pawl.

  Document EP 303965 describes an auxiliary signaling unit of the type mentioned, comprising two juxtaposed levers and projecting from the front face of the housing. The first lever is used to activate the mechanism of one of the switch-reversers to allow manual engagement of the latter, and to indicate the position of 21ff 2795860 switching. The second handle is coupled to the circuit breaker handle and is used to

  simultaneous switching on of the auxiliary unit and the circuit breaker.

  Object of the invention The object of the invention consists in producing an auxiliary signaling module having at least one easily switchable switch in open - closed OF version, or armed SD

- sets off.

  The auxiliary signaling module according to the invention is characterized in that a fault signaling lever SD is mounted on the plate of the mechanism, and that the movable contact of the second switch is actuated by an intermediate lever, which follows the movement of the board or the signaling lever depending on the selector setting, respectively for the choice of the operating mode OF open - closed, or

SD armed - triggered.

  According to a preferred embodiment, the intermediate lever is pivotally mounted on an axis whose positioning is modified when the selector is adjusted. The movable contact of the first switch is actuated by the rotary plate, and the signaling lever SD with bistable indicator is pivotally mounted on a pivot of the plate between

  an armed position and a triggered position.

  According to a characteristic of the invention, the selector is coupled to a switching indicator intended to display the operating mode OF-OF or SD-OF from the front face of the housing. The choice of operating mode takes place before coupling with the switchgear. Switching of the selector becomes impossible when the auxiliary signaling module is attached and coupled to the circuit breaker, because the selector is no longer

accessible.

Brief description of the drawings

  Other advantages and characteristics will emerge more clearly from the description which follows.

  follow of an embodiment of the invention given by way of nonlimiting example, and shown in the accompanying drawings in which: - Figures 1, 2 and 3 are elevation views showing the first version of OF-OF operation the auxiliary signaling module according to the invention, respectively in the closed, manual open, and open by release position, the selector being in a first adjustment position; - Figures 4, 5, and 6 are identical views of the previous figures showing the second version of SD-OF operation of the auxiliary signaling module according to the invention, respectively in the closed position, manual opening, and opening by release, the selector being in a second position

adjustment.

  Description of a preferred embodiment

  With reference to FIGS. 1 to 6, an auxiliary signaling module 10 is housed in an insulating box 12 intended to be attached and coupled to an electrical device with trip device, in particular a circuit breaker or a low voltage differential switch. The housing 12 contains two electrical switches 14, 16 actuated by a control mechanism 18, which is controlled by mechanical triggering and

  resetting of the electrical equipment.

  Each switch 14, 16 is provided with a movable contact 20, 22 reverser formed by a flexible metal blade cooperating with a pair of fixed contacts 24, 26; 28, 30 isolated from each other. The first switch 14 on the right permanently indicates an OF signaling of the open-closed state of the switchgear contacts, while the second switch 16 on the left permanently indicates either an open-closed OF signaling, or

  SD signaling fault signal depending on the position of a rotary selector 32.

  The fixed contacts 24, 26 and the movable contact 20 of the first switch 14 are electrically connected to connection terminals 34, 36, 38 housed in cells on the right side face of the housing 12. The fixed contacts 28, 30 and the movable contact 22 of the second switch 16 are electrically connected to connection terminals 40, 42, 44 housed in cells on the left side face of the housing 12. The auxiliary signaling module 10 is provided with a lever 46 pivotally mounted on an axis 48, and connected to the hook for hooking the mechanism 18 by a transmission link 50. The mechanism 18 comprises a plate 52 rotating between two extreme positions which permanently indicates the open-closed state of the contacts of the circuit breaker, and a trip bar 54 for receiving a trip order from the circuit breaker. On the pivot 56 of the plate 52 is rotatably mounted a signaling lever

  58 SD fault signal which permanently indicates the armed-tripped state of the circuit breaker.

  The end of the signaling lever 58 includes for this purpose a visible bistable indicator 60

  from the front face 62 of the housing 12.

  The movable contact 20 of the first switch 14 is actuated by the plate 52, while the movable contact 22 of the second switch 16 is driven by an intermediate lever

  62 pivotally mounted on an axis 64.

  The selector 32 has two stable adjustment positions, and is accessible from the large right side face of the housing 12 constituting the face of contact with the circuit breaker. The setting of the selector 32 is operated manually by means of a screwdriver, and allows the user to choose between two operating modes of the auxiliary signaling module 10, namely a first OF-OF mode, and a second mode. SDOF. The choice of operating mode is made before coupling with the circuit breaker. Switching becomes impossible when the auxiliary signaling module 10 is attached

  and coupled to the circuit breaker, because the selector 32 is no longer accessible.

  Depending on the angular position of the selector 32, the intermediate lever 62 for driving the movable contact 22 of the second switch 16 comes to bear on the plate 52 (Figures 1 to 3) or on the signaling lever 58 SD fault signal (Figures 4 to 6). The change of position of the selector 32 causes a modification of the positioning of the axis 64 of the lever

intermediate 62.

  The selector 32 also drives a switching indicator 66 which displays on the front panel 62 the chosen operation. In OF operation of the second switch 16, the intermediate lever 62 follows the plate 52. In SD operation of the second switch 16, the intermediate lever 62 is driven by the signaling lever 58 SD fault signal. A tension spring 68 is arranged between a fixed point 70 of the housing 12, and the signaling lever 58 SD fault signal. The spring 68 is in the stretched state in the event of non-tripping when the circuit breaker is in the closed position or opened by manual action. The signaling lever 58 SD fault signal is then in the armed position

(Figures 1-2 and 4-5).

  The spring 68 returns to the relaxed state in the event of automatic tripping of the circuit breaker, and requests the signaling lever 58 SD fault signal towards the position

triggered (Figures 3 and 6).

6 2795860

  Operation in OF-OF mode The operation of the auxiliary signaling module 10 in OF-OF version is illustrated in Figures 1-3. The selector 32 is adjusted in a given position which positions the intermediate lever 62 bearing on the plate 52. The second switch 16 indicates, like the first switch 14, the open-closed state OF of the circuit breaker. The setting of the OF-OF operating mode is displayed on the front panel 62 by the

switching 66.

  In FIG. 1, the auxiliary signaling module 10 is in the closed position, and the two movable contacts 20, 22 are in engagement against the fixed contacts 24, 28 both reflecting the positioning of the plate 52 by indicating the state circuit breaker closed. The signaling lever 58 SD fault signal is in the armed position, and the spring 68 is located

in the tense state.

  FIG. 2 represents the phase of manual opening of the circuit breaker, in which the lever 46 of the auxiliary signaling module 10 pivots in an anticlockwise direction, driving the turntable 52 in the same direction. The two movable contacts 20, 22 are moved simultaneously by the plate 52 in the same direction, and come into engagement against the fixed contacts 26, 30 both indicating the open state of the circuit breaker. The signaling lever 58 SD fault signal remains stationary during the manual opening of the circuit breaker, and has no influence on the intermediate lever 62,

  since the movable contact 22 exclusively follows the movement of the plate 52.

  If the circuit breaker trips (Figure 3), the trip bar 54 unlocks the plate 52, which moves to the same position as that shown in Figure 2, but faster. The two movable contacts 20, 22 are moved simultaneously by the plate 52 in the same direction, and come into engagement against the fixed contacts 26, 30 both indicating the open state of the circuit breaker. The signaling lever 58 SD fault signal is biased by the spring 68 towards the tripped position so as to indicate the opening mode of the circuit breaker by tripping. The two switches 14, 16 operate in open-closed OF mode, and the lever

  intermediate 62 follows the plate 52 and not the signaling lever 58 SD fault signal.

  The latter is not blocked, however, because it indicates that the circuit breaker has tripped.

7- + 2795860

  Operation in SD-OF mode The operation of the auxiliary signaling module 10 in SD-OF version is illustrated in Figures 4-6. The selector 32 is switched by means of a screwdriver to the other position, which modifies the location of the axis 64 of pivoting of the intermediate lever 62. The latter comes to bear on the signaling lever 58 fault signal SD , and the setting of the operating mode SD-OF is displayed on the front panel 62 by the switching indicator 66 which pivots to the right. The first switch 14 controlled by the plate 52 always indicates the open-closed state OF of the circuit breaker, and the second switch 16 controlled by the signaling lever 58 indicates the armed-tripped state SD of the circuit breaker. In FIG. 4, the auxiliary signaling module 10 is in the closed position, and the movable contacts 20, 22 are in engagement against the fixed contacts 26, 28. The first switch 14 indicates the closed state of the contacts of the circuit breaker, and the second

  switch 16 signals the armed state of the circuit breaker.

  During manual opening of the circuit breaker (FIG. 5), the handle 46 of the auxiliary signaling module 10 pivots anticlockwise, driving the turntable 52 in the same direction. The movable contact 20 is actuated towards the fixed contact 26, and the first switch 14 signals the open state of the contacts of the circuit breaker. The signaling lever 58 remains stationary in the armed position, and does not drive the intermediate lever 62 which remains in the same position as that of FIG. 4. The movable contact 22 remains in engagement against the fixed contact 28, and the second switch 16

  confirms the armed state of the circuit breaker.

  If the circuit breaker trips (Figure 6), the trip bar 54 causes the plate 52 to be unlocked, which moves to the same position as that shown in Figure 5, but faster than the handle. The two movable contacts 20, 22 are moved simultaneously in the same direction against the fixed contacts 26, 30, one by the action of the plate 52, and the other by the intermediate lever 62 driven by the signaling lever 58 The first switch 14 signals the open state of the circuit breaker contacts, and the second switch 16 signals the tripping of the circuit breaker following the passage of the signaling lever 58 towards the

triggered position.

  From the position of FIG. 6, the rearming of the auxiliary signaling module is carried out during a manual closing of the circuit breaker which causes the displacement of the plate 52 towards the position of FIG. 4. The rotation of the lever 46 and of the plate 52 in a clockwise direction, drives the signaling lever 58 in the same direction towards the armed position. It is also possible to operate the reset directly by moving the indicator light 60 from the triggered position (figure 6) to the armed position

(figure 4).

Claims (7)

  1. Auxiliary signaling module (10) for an electrical device with trip device, in particular a circuit breaker or a differential switch, said module comprising an insulating housing (12) containing: - a first reversing switch (14) with movable contact (20) intended to indicate an open - closed OF signaling of the switchgear contacts, - a second change-over switch (16) with movable contact (22) intended to indicate either an open-closed OF signaling of the switchgear contacts, or an SD signaling fault signal representative of the armed or tripped state of the switchgear, - a mechanism (18) with lever (46) and rotary plate (52) for actuating the movable contacts (20, 22) of the first and second switches (14, 16), - mechanical connection means for transmitting to the mechanism (18) the open closed state, and the armed state - triggered of the apparatus, - and a selector (32) for the choice of the mode of working ent OF or SD of the second switch (16), characterized in that a signaling lever (58) SD fault signal is mounted on the plate (52) of the mechanism (18), and that the movable contact (22) of the second switch (16) is actuated by an intermediate lever (62), which follows the movement of the plate (52) or the signaling lever (58) according to the setting of the selector (32), respectively for the choice of the operating mode OF open   - closed, or armed SD - triggered.   2. auxiliary signaling module according to claim 1, characterized in that the intermediate lever (62) is pivotally mounted on an axis (64) whose positioning   is modified when the selector (32) is adjusted.   3. auxiliary signaling module according to claim 1 or 2, characterized in that the movable contact (20) of the first switch (14) is actuated by the rotary plate (52) of the mechanism (18).   4. Auxiliary signaling module according to one of claims 1 to 3, characterized in that   that the signaling lever (58) SD fault signal is pivotally mounted on a pivot (56) of the plate (52) between an armed position and a triggered position, and is   equipped with a bistable indicator (60) visible from the front face (62) of the housing (12).   5. Auxiliary signaling module according to one of claims 1 to 4, characterized in that   that the selector (32) is coupled to a switching indicator (66) intended to display the operating mode OF-OF or SD-OF from the front face (62) of the housing (12).   6. auxiliary signaling module according to claim 4, characterized in that the signaling lever (58) is biased towards the position triggered by a spring   traction (68) when the circuit breaker trips.   7. auxiliary signaling module according to one of claims 1 to 6, characterized in   that the selector (32) is accessible from a large lateral face of the housing (12)   before being attached to the apparatus.