EA002666B1 - Auxiliary indicating module for an electrical switchgear apparatus with a trip device - Google Patents

Abstract

1. An auxiliary indicating module (10) for an electrical switchgear apparatus with a trip device, in particular a differential circuit breaker or switch, said module comprising an insulating case (12) housing: - a first switch (14) with a movable changeover contact (20) designed to provide an open-closed OC indication of the switchgear apparatus contacts, - a second switch (16) with a movable changeover contact (22) designed to provide either an open-closed OC indication of the switchgear apparatus contacts or a fault signal FS indication representative of the loaded or tripped state of the switchgear apparatus, - a mechanism (18) with a handle (46) and rotary plate (52) for actuation of the movable contacts (20,22) of the first and second switches (14, 16), - mechanical linking means to transmit the open-closed state and the loaded-tripped state of the switchgear apparatus to the mechanism (18), - and a selector (32) for choosing the open-closed OC or fault signal FS operating mode of the second switch (16), characterized in that a fault signal FS indicating lever (58) 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 lever follows the movement of the plate (52) or of the indicating lever (58) according to the setting of the selector (32), respectively to choose the open-closed OC or loaded-tripped FS operating mode. 2. The auxiliary indicating module according to claim 1, characterized in that the intermediate lever (62) is pivotally mounted on a spindle (64) the positioning whereof is modified when the setting position of the selector (32) is modified. 3. The auxiliary indicating 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. The auxiliary indicating module according to any one of the claims 1 to 3, characterized in that the fault signal FS indicating lever (58) is pivotally mounted on a pivot (56) of the plate (52) between a loaded position and a tripped position, and is equipped with a bistable indicating flag (60) visible from the front panel (62) of the case (12). 5. The auxiliary indicating module according to any one of the claims 1 to 4, characterized in that the selector (32) is coupled to a switching indicator (66) designed for the operating mode OC-OC or FS-OC to be visualized from the front panel (62) of the case (12). 6. The auxiliary indicating module according to claim 4, characterized in that the indicating lever (58) is urged to the tripped position by a tension spring (68) when tripping of the circuit breaker takes place. 7. The auxiliary indicating module according to any one of the claims 1 to 6, characterized in that the selector (32) is accessible from a large side face of the case (12) before adjoinment of the module to the switchgear unit.

Description

FIELD OF THE INVENTION

The invention relates to an auxiliary indication module for electrical switching equipment with a trip, in particular for a differential disconnector or switch, said module comprising an insulating casing enclosing a first switch with a movable switching contact designed to provide an “open open” indication (ZR) contacts of switching equipment, the second switch with a movable switching contact, designed to provide or indication "lock "open" (ZR) contacts of the switching equipment, or indication of a fault signal (SN) representing the state of the switching equipment - either "under load" or "disengaged", a mechanism with a handle and a rotary plate for actuating the movable contacts of the first and second switches, mechanical means of communication for transmitting the “closed-open” state and the “under load-disconnected” state of the switching equipment to the said mechanism, and a selector for selecting the operation mode of the second switch Phone: “closed-open” (ЗР) or “fault signal” (СН).

State of the art

Document EP 147605 relates to a switchable auxiliary display device, one of which can be fixed in the closed position by means of a locking cam connected to the control handle, this handle passing through the front panel of the housing. The selector allows you to limit the area of articulated rotation of the locking cam.

EP 303965 describes an auxiliary display device of the aforementioned type, including two adjacent handles extending from the front panel of the housing. The first handle serves to actuate the mechanism of one of the rocker switches, allowing the latter to be closed manually, and to indicate the position of the switch. The second handle is connected to the handle of the switch and serves to simultaneously close the auxiliary device and the switch.

SUMMARY OF THE INVENTION

The aim of the invention is the development of an auxiliary display module containing at least one rocker switch, easily translated either into the "closed-open" (ZR) mode or the "fault signal" (CH).

The auxiliary display module according to the invention is characterized in that the indicating lever of the fault signal (CH) is mounted on the mounting base of the mechanism, and in that the movable contact of the second switch is actuated by the intermediate lever following the movement of the mounting base or indicating lever in accordance with the installation position of the selector to select, respectively, the operation mode "closed-open" (ZR), or "fault signal" (CH).

According to a preferred embodiment of the invention, the intermediate lever is pivotally mounted on a shaft, the position of which changes as the mounting position of the selector changes. The movable contact of the first switch is driven by a rotary plate, and the indicating lever CH with a two-state indication flag is pivotally mounted on the plate between the “under load” and “uncoupled” positions.

In accordance with one of the features of the invention, the selector is associated with a switching indicator designed for visual display on the front panel of the housing of the operating mode (ZR) - (ZR) or (CH) - (ZR). The selection of the operating mode is carried out before the connection with the said equipment. Switching the operating mode after the auxiliary display module is brought into contact and connected to the switch becomes impossible, since the selector is no longer accessible.

Brief description of the accompanying drawings

Other advantages and features will become clearer from the following description of an embodiment of the invention, given as an example only, not limiting generality, and shown in the accompanying drawings, in which FIG. 1-3 are vertical sections illustrating the first embodiment, ZR - ZR, of the auxiliary display module according to the invention, in the closed state, in the position of manual opening and opening by locking, respectively, wherein the selector is set to the first installation position;

FIG. 4-6 are sections identical to those shown in the previous figures, showing the second embodiment (SN) - (ZR) of the auxiliary display module according to the invention, in the closed state, in the position of manual opening and opening by tripping, respectively, wherein the selector is installed in the second installation position.

Description of a preferred embodiment of the invention

According to FIG. 1-6, the auxiliary display module 10 is placed in an insulating casing 12, which must be adjacent and connected to the electrical switching equipment with a trip, in particular, a low-voltage differential switch or disconnector. In the housing 12 there are two electric rocker switches 14, 16, driven by a control mechanism 18, which, with the aim of disengaging and returning the electrical switching equipment to its original state, is controlled by mechanical communications.

Each of the rocker switches 14, 16 is equipped with a movable switching contact 20, 22, which is a flexible metal knife, acting in conjunction with a pair of stationary contacts 24, 26; 28, 30, isolated from one another. The first, right, rocker switch 14 constantly provides an indication of the open or closed state of the contacts of the electrical switching equipment ZR, while the second, left, rocker switch 16 provides either an open or closed indication of the ZR, or an indication of the malfunction signal CH in accordance with which has a rotary selector 32.

The stationary contacts 24, 26 and the movable contact 20 of the first rocker switch 14 are electrically connected to the clamps 34, 36, 38 located in the recesses of the right side of the housing 12. The stationary contacts 28, 30 and the movable contact 22 of the second rocker switch 16 are electrically connected to the clamps 40, 42, 44 located in the recesses of the left side of the housing 12.

The auxiliary display module 10 is provided with a handle 46 pivotally mounted on the shaft 48 and connected to the latch hook of the mechanism 18 by means of the transmission rod 50. The mechanism 18 includes a rotary plate 52 that rotates between two extreme positions, and this plate provides a constant indication of the status of “closed- open ”contacts of the circuit breaker and the trip rod 54 for accepting the trip trip command. The indicating lever 58 of the fault signal (CH), which provides a constant indication of the state of the circuit breaker - “under load” or “uncoupled”, is mounted for rotation on the hinge 56 of the plate 52. At the end of the indicating lever 58 for this purpose there is an indicator flag 60, which has two stable the position visible from the front panel 62 of the housing 12.

The movable contact 20 of the first rocker switch 14 is driven by the plate 52, and the movable contact 22 of the second rocker switch 16 is driven by an intermediate arm 62 pivotally mounted on the shaft 64.

The selector 32 has two stable installation positions, and is accessed from the large right side surface of the housing 12, which is the contact surface to the switch. Installation of the selector 32 is done manually using a screwdriver and allows the user to choose between two modes of operation of the auxiliary display module 10, namely the first mode (ZR) - (ZR) and the second mode (CH) - (ZR). The choice of operating mode is carried out before the module is connected to the switch. Switching the operation mode becomes impossible when the auxiliary display module is adjacent and connected to the switch, as the selector 32 is no longer available.

Depending on the angle of rotation of the selector 32, the intermediate drive lever 62 of the movable contact 22 of the second switch 16 reaches the stopper formed by the plate 52 (Fig. 1-3) or the indicator lever 58 of the fault signal (CH) (Fig. 4-6). Changing the position of the selector 32 causes a change in the positioning of the shaft 64 of the intermediate lever 62.

In addition, the selector 32 controls the switch indicator 66, which displays the selected mode of operation on the front panel 62. In the operating mode of the SR of the second switch 16, the intermediate lever follows the plate 52. In the operating mode (CH) of the second switch 16, the intermediate lever is actuated by an indicating lever 58 fault signal (CH).

A displacement spring 68 is installed between a fixed point 70 of the housing 12 and the indicating lever 58 of the malfunction signal CH. The spring 68 is in a tense state if the trip did not occur when the switch is in the closed state or has been manually opened. The indicating lever 58 of the fault signal (CH) is then in the “under load” state (Figs. 1-2 and 4-5).

The spring 68 returns to the free state in the event of automatic tripping of the circuit breaker and causes the indicating lever 58 of the malfunction signal CH to switch to the "disengaged" state (Figs. 3 and 6).

Operation in (ЗР) - (ЗР) mode

The operation of the auxiliary display module in embodiment (ZR) - (ZR) is shown in FIG. 1-3. The selector 32 is moved to a predetermined position, in which the intermediate lever 62 is transferred to the plate 52. The second switch 16 indicates the state of "closed - open" (ZR) of the switch, in the same way as the first switch 14. Selecting the set mode (ZR) - ( ЗР) is displayed on the front panel 62 by the switch indicator 66.

In FIG. 1, the auxiliary display unit 10 is in the closed state, and two movable contacts 20, 22 are pressed against the stationary contacts 24, 28, both of which reflect the location of the plate 52, indicating the closed state of the switch. The indicator lever 58 of the malfunction signal (CH) is in the "under load" position, and the spring 68 is in tension.

FIG. 2 represents the manual opening phase of the switch, in which the handle 46 of the auxiliary display unit 10 pivots counterclockwise, driving the rotary plate 52 in the same direction. Two movable contacts 20, 22 are simultaneously shifted in the same direction by the plate 52 and pressed against the stationary contacts 26, 30, both of which indicate an open state of the circuit breaker. The indicator lever 58 of the fault signal (CH) during manual opening of the switch remains stationary and does not have any effect on the intermediate lever 62, since the movable contact 22 only repeats the movement of the plate 52.

In the event of a trip of the circuit breaker (FIG. 3), the trip rod 54 unlocks the plate 52, which moves in the same direction as shown in FIG. 2, but more quickly. Both movable contacts 20, 22 are simultaneously shifted in the same direction by the plate 52 and pressed against the stationary contacts 26, 30, both of which indicate an open state of the circuit breaker. The indicator lever 58 of the malfunction signal CH is translated by the spring 68 to the "disengaged" position so as to indicate the open state of the circuit breaker due to the trip.

Both switches 14, 16 operate in the ZR mode, and the intermediate lever 62 follows the plate 52, and not the indicating lever 58 of the malfunction signal CH. However, the latter is not disconnected, since it indicates the tripping of the circuit breaker.

Operation in (SN) - (ЗР) mode

The operation of the auxiliary display module in the embodiment (CH) - (ZR) is illustrated in FIG. 4-6. The selector 32 is installed using a screwdriver to another position, which changes the location of the hinge shaft 64 of the intermediate lever 62. The latter reaches the stopper formed by the indicating signal 58 of the malfunction signal CH, and the choice of the operating mode (CH) - (ЗР) is indicated on the front panel 62 by an indicator 66 switching, which pivots to the right. The first switch 14, which is controlled by the plate 52, still indicates the closed-open state of the disconnector switchgear ZP, and the second switch 16, which is controlled by the indicating lever 58, indicates the state of the load-disconnected (CH) switch.

In FIG. 4, the auxiliary indication module 10 is in the closed state, and the movable contacts 20, 22 are pressed against the stationary contacts 26, 28. The first switch 14 indicates the closed state of the switch contacts, and the second switch 16 indicates the “under load” state of the switch.

When manual opening of the disconnector is performed (FIG. 5), the handle 46 of the auxiliary display unit pivots counterclockwise, driving the rotary plate 52 in the same direction. The movable contact 20 is biased towards the stationary contact 26, and the first switch 14 indicates an open state of the contacts of the switch. The indicating lever 58 remains stationary in the “under load” state and does not drive the intermediate lever 62, which remains in the same position as in FIG. 4. The movable contact 22 remains pressed against the stationary contact 28, and the second switch 16 confirms the “under load” state of the switch.

In the event of a trip of the switch (FIG. 6), the trip rod 54 unlocks the plate 52, which moves in the same direction as shown in FIG. 5, but faster than the crank. Both movable contacts 20, 22 are simultaneously shifted in the same direction and pressed against the stationary contacts 26, 30, one of them under the action of the plate 52, and the other by the intermediate lever 62, driven by the indicating lever 58. The first switch 14 indicates an open state contacts of the switch, and the second switch 16 indicates the tripping of the switch after moving the indicating lever 58 to the "disengaged" position.

From the position shown in FIG. 6, the reset of the auxiliary display module occurs when the circuit breaker is manually closed, which causes the plate 52 to move to the position shown in FIG. 4. Turning clockwise the handle 46 and the plate 52 sets the indicating lever 58 in the same direction to the “under load” position. It is also possible to perform a reset directly by moving the indicator flag 60 from the “disengaged” position (FIG. 6) to the “under load” position (FIG. 4).

Claims (7)

1. An auxiliary indication module (10) for electrical switching equipment with a trip, in particular a differential switch or a disconnector, comprising an insulating housing (12) and a first switch (14) located therein with a movable switching contact (20) designed to provide an indication " closed "(ЗР) contacts of switching equipment, the second switch (16) with a movable switching contact (22), designed to provide either an indication of" closed-open "(ЗР) contacts to switching equipment, or indication of a malfunction signal (CH), representing the state of the gear shift installation, is either “under load” or “disengaged”, a mechanism (18) with a handle (46) and a rotary plate (52) for actuating the movable contacts ( 20, 22) of the first and second switches (14, 16), a mechanical means of communication for transmitting the state “closed - open” and “under load - uncoupled” of switching equipment to the mentioned mechanism (18) and a selector (32) for selecting the operating mode of the second switch (16) "lock open-circuited ”(ZR) or“ fault signal ”(CH), characterized in that the indicating lever (58) of the fault signal (CH) is mounted on the rotary plate (52) of the mechanism (18), and the movable contact (22) of the second switch (16) is arranged to be actuated by the intermediate lever (62) following the movement of the plate (52) or the indicating lever (58) in accordance with the installation position of the selector (32), which selects, respectively, the “closed-open” mode of operation ( ЗР) or “under load - disconnected” (СН). 2. The auxiliary display module according to claim 1, characterized in that the intermediate lever (62) is pivotally mounted on the shaft (64), the position of which changes when the installation position of the selector (32) changes. 3. The auxiliary display module according to claim 1 or 2, characterized in that the movable contact (20) of the first switch (14) is configured to actuate the said mechanism (18) by the rotary plate (52). 4. The auxiliary display module according to any one of claims 1 to 3, characterized in that the indicating lever (58) of the fault signal (CH) is pivotally mounted on the hinge (56) of the plate (52) between the “under load” and “uncoupled” positions and equipped with an indication flag (60) having two stable states visible from the front panel (62) of the housing (12). 5. The auxiliary display module according to any one of claims 1 to 3, characterized in that the selector (32) is connected to a switching indicator (66) designed to visually display the operating mode (ZR) - (ZR) and (SN) - (Zr ) from the front panel (62) of the housing (12). 6. The auxiliary display module according to claim 4, characterized in that the indicating lever (58) is moved to the “disconnected” position by the tension spring (68) when the circuit breaker trips. 7. The auxiliary display module according to any one of claims 1 to 6, characterized in that the selector (32) is made accessible from the large right side surface of the housing (12) until the module is attached to the switching equipment.