CN202473786U - Control device of breaker and breaker comprising the control device - Google Patents

Abstract

The utility model relates to a control device of a circuit breaker and a circuit breaker comprising the control device. The control device includes a control mechanism. The control mechanism is used to occupy a plurality of positions corresponding to manual mode, remote mode and lock mode, so that in each mode, the circuit breaker can only realize the operation or control corresponding to the corresponding mode, and the operation in other modes is disabled. The control mechanism realizes the separation of local control and remote control of the circuit breaker. The individual operating states of the circuit breaker are not combined with each other, so that the circuit breaker can only operate in a unique operating mode. Therefore, the operator will not be confused about the mode status of the motor driver.

Description

Control device for circuit breaker and circuit breaker including the control device

technical field

The utility model relates generally to electrical switching devices, and more particularly to control devices for circuit breakers.

Background technique

Generally, electrical devices such as switchgear, and circuit breakers in particular, have the function of making and breaking selected circuits from a power source. This is accomplished, for example, by engaging and opening a pair of electrical contacts for each phase of the circuit breaker. Circuit breakers provide protection from sustained overcurrent conditions as well as from very high currents produced by short circuits. Typically, one electrical contact is fixed and the other is movable, for example mounted on a pivotable contact arm. The contact arm is pivoted by the operating mechanism so that the movable contact can engage and disengage from the fixed contact. When an overcurrent or short circuit condition is encountered, the separation of the contacts can be automatically produced by means of the trip mechanism of the circuit breaker.

Furthermore, the above-mentioned engaging and opening functions of the circuit breaker are usually controlled by a control device. The control device is arranged to enable the circuit breaker to be in manual mode, remote mode or locked mode. The control device can be, for example, a motor operator or a motor drive, which is usually fixed to the housing of the circuit breaker. The driving mechanism (such as various forms of actuators) in the control device can interact with the aforementioned operating mechanism to switch on or off the circuit breaker in a corresponding mode.

Patent document WO 01/69622 A1 discloses a control device for a circuit breaker comprising an actuator for occupying a plurality of positions, an "on" button, a "off" button and a selector for occupying Multiple positions, such as the position of the locking actuator, the ON button, and the OFF button. The control unit can also remotely activate the circuit breaker. This patent document is hereby incorporated by reference.

Another known product is eg a circuit breaker from the company ABB. This circuit breaker also has three drive mode states, namely LOCK, AUTO and MANUAL. In manual mode, the electronics are disconnected via a micro switch, enabling the drive to be controlled by two pushbuttons, such as an on and off pushbutton. In automatic mode, the microswitches of the electronics are connected so that the actuator can be controlled by two buttons. In locked mode, the electronics are disconnected via the microswitch and the on button is locked mechanically.

These known products and other similar devices in the prior art are not able to block and limit the control interface (electrical controller and mechanical controller) in independent mode, so there are certain modes combined with each other, which may make the operator Not sure about the state of the drive mode. Therefore, there is a need in the art for a control device that can clearly separate the local control and remote control of the circuit breaker.

Utility model content

The purpose of this utility model is to provide a system capable of blocking and restricting the functions of the control interface (i.e. electrical controller and mechanical controller) in the individual operating modes of the circuit breaker (i.e. manual, remote and lockout modes), thereby realizing Separation of local control and remote control.

According to one aspect of the present invention, a control device for a circuit breaker is provided. The control device includes a control mechanism. The control mechanism is used to occupy a plurality of positions corresponding to manual mode, remote mode and lock mode, so that in each mode, the circuit breaker can only realize the operation or control corresponding to the corresponding mode, and the operation in other modes is disabled.

Preferably, the control means includes an on button and an off button. The on button and off button are respectively used to turn on and off the circuit breaker. The on and off buttons are respectively associated with the control mechanism such that in the respective modes the control mechanism enables or disables the function of the buttons.

Preferably, said control means includes a selection mechanism. The selection mechanism can select the manual mode, remote mode and lockout mode of the circuit breaker accordingly.

Preferably, said control means comprises a motor drive associated with an on button and an off button for operating the circuit breaker on and off.

Preferably, in manual mode the motor drive can only be controlled locally by mechanically operating the on and off buttons. In this manual mode, the motor driver cannot be controlled remotely. In particular, said control mechanism of the invention allows to perform the functions of these buttons.

Preferably, in remote mode only the motor driver can be controlled remotely. The circuit breaker does not enable control of the motor drive by mechanically operating an on or off button associated with the motor drive. These buttons can be pressed, but they have no function in this remote mode. Specifically, the functions of these buttons are disabled by the control mechanism of the present invention.

Preferably, in locked mode, control of the motor drive in both said manual mode and remote mode is disabled. Specifically, remote mode is electronically/electrically blocked. Manual control via mechanical buttons is also disabled like remote mode.

Preferably, a mechanical locking of the on button may further be provided in the locking mode, for example by means of a mechanical locking mechanism. This provides an extra measure of safety, increasing protection against accidental switch-on. Specifically, the on button is mechanically blocked, it cannot be pressed. Furthermore, the disconnect button is still similar to the disconnect button in remote mode, ie: it can be pressed, but its function is disabled.

Preferably, the control mechanism of the present invention is composed of a plurality of tie rods/pull rods. Preferably, corresponding connecting rods are arranged under the on button and the off button. The tie rod of the control mechanism can make the connecting rod swing to the positions corresponding to the manual mode, the remote mode and the locking mode, so as to realize corresponding functions. When the link is swung to a position corresponding to manual mode, the trip/trip movement of the tie bar is enabled; when the link is swung to a position corresponding to lock mode or remote mode, the The trip/trip movement of the tie bar is disabled.

According to another aspect, there is provided a circuit breaker comprising the control device described above. The circuit breaker is capable of independent functions in a separate mode by means of the control device, thereby completely distinguishing local operation from remote operation.

The utility model realizes the separation of local control and remote control of the circuit breaker through an innovative control mechanism. The individual operating states of the circuit breaker are not combined with each other, ie the circuit breaker can only operate in a unique operating mode. Therefore, the operator will not be confused about the mode status of the motor driver.

Other aspects, features, and advantages of the invention are apparent from the following detailed description, by illustrating exemplary embodiments and implementations, including the best mode contemplated for carrying out the invention. The utility model can also have other different embodiments, and its details can be implemented in various aspects, all of which do not depart from the spirit and scope of the utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not restrictive.

Description of drawings

A full appreciation of the disclosed concept can be obtained from the following description of the preferred embodiments when read in conjunction with the accompanying drawings, in which:

Fig. 1 is a front perspective view of a control device of a circuit breaker according to an exemplary embodiment of the present invention;

Figure 2 is a rear perspective view of the control device in Figure 1;

Figure 3 shows the swing position of the linkage in locked mode and remote mode;

Figure 4 shows the swing position of the linkage in manual mode;

Figures 5-8 respectively show the control device of the circuit breaker in the corresponding mode in a perspective view.

Detailed ways

The concept of the present utility model can be applied to various electrical switching devices, such as but not limited to circuit breakers, network protectors, transfer switches.

Referring to FIG. 1 , there is shown a control device 10 for a circuit breaker according to an exemplary embodiment of the present invention. The control device 10 may be attached to a circuit breaker (not shown). The circuit breaker can be a MCCB type circuit breaker (molded case circuit breaker). A circuit breaker may include a handle operable between ON (connected) and OFF (disconnected) positions such that a contact operating mechanism therein engages and disengages fixed contacts for one or more phases of the circuit breaker. head to make or break the circuit. The control device 10 can operate the switching on and off of the circuit breaker by means of the motor driver 40 .

As shown in FIGS. 1-2 and 5-8 , the control device 10 for a circuit breaker includes a frame assembly or panel assembly 50 . On one side of the frame assembly 50, an on button 1 and an off button 2 are installed. The on button 1 and the off button 2 are respectively used to turn on and off the circuit of the circuit breaker. The on button 1 and the off button 2 are respectively associated with the control mechanism of the control device 10 . Preferably, as shown in FIG. 2 , the control mechanism may be composed of three tie rods/tension rods 3 , 4 , 5 , namely: a first tie rod 3 , a second tie rod 4 and a third tie rod 5 . However, it should be understood that the number of tie rods is not limited to three, but can be changed according to needs. As shown in FIG. 2 , corresponding connecting rods 21 and 22 are arranged under the on button 1 and the off button 2 . Preferably, the control device 10 may also include a selection mechanism 11 . The selection mechanism 11 can select the manual mode, the remote mode and the locking mode of the circuit breaker accordingly. The selection mechanism 11 is mounted to a frame assembly 50 . Preferably, the selection mechanism 11 is provided with at least one tongue 25 (see FIG. 2 ) which is slidably fitted in a corresponding notch 26 provided on the side of the frame assembly 50 . The selection mechanism is also associated with the second tie rod 4 of the control mechanism so as to cooperate with the control mechanism. The tie rods of the control mechanism can cooperate with each other, so that the connecting rods 21, 22 can swing to positions corresponding to the manual mode, the remote mode and the locking mode, so as to realize corresponding functions.

Specifically, as shown in FIG. 2 , the first tie rod 3 may be provided with a groove 61 at its end. The link 21 may fit in the groove 61 . The third tie rod 5 may also be provided with a groove 63 at its end and a groove 62 on the opposite side of the groove 63 . Link 22 may fit in groove 62 . One end of the second tie rod 4 can fit in the groove 63 , while the other end can fit with the first tie rod 3 . When the link 21 or 22 is swung into a position corresponding to the locked mode or the remote mode, the tripping/tripping movement of the tie rods 3, 4, 5 will be disabled. In contrast to this, when the link 21 or 22 is swung into a position corresponding to the manual mode, the tripping movement of the tie rods 3, 4, 5 will be activated. In this way, the control mechanism is able to enable or disable the function of the buttons 1, 2 in each mode. It should be understood that the cooperation between each tie rod and the connecting rod is not limited to the form of notch, and other suitable forms of cooperation, such as stopper, form fit and so on, are also possible. In addition, a spring may also be provided in the control device to cooperate with the operation of the control mechanism. For example, the spring 31 may be associated at one end with the third tie rod 5 and at the other end with the frame assembly 50 . The spring 32 may be associated at one end with the selection mechanism 11 , and thus with the second tie rod 4 , and at the other end with the frame assembly 50 .

Referring to FIG. 3 , the swing position 6 of the linkage 22 is shown in the locked mode and the remote mode. Referring to Figure 4, the swing position 7 of the link 21 in manual mode is shown. Therefore, in the manual mode, the motor driver 40 can only be controlled locally by mechanically operating the on button 1 and the off button 2 . In this manual mode, the remote control is electronically/electrically disabled so that the motor driver 40 cannot be controlled remotely. In the remote mode, only the motor driver 40 can be remotely controlled. By virtue of the aforementioned prohibition of the tripping movement of the tie rod of the control mechanism in remote mode, the circuit breaker cannot achieve control of the motor drive 40 by mechanically operating the on button 1 or off button 2 associated with the motor drive 40 . Although these buttons can be pressed, they have no function in this remote mode. In the locked mode, control of the motor driver 40 in both the manual mode and the remote mode is disabled. Specifically, remote mode is electronically/electrically blocked. Manual control via mechanical buttons is also disabled like remote mode. Preferably, a mechanical locking of the on button 1 can further be provided in the locking mode, for example by means of a mechanical locking mechanism. This provides an extra measure of safety, increasing protection against accidental closing of the circuit breaker. Specifically, the on button 1 can be mechanically blocked so that it cannot be pressed. Furthermore, disconnect button 2 is still similar to the disconnect button in remote mode, ie: it can be pressed, but its function is disabled.

In this way, the control mechanism of the control device 10 of the present utility model can occupy multiple positions corresponding to the manual mode, the remote mode and the locking mode, so that in each mode, the circuit breaker can only realize the operation or control corresponding to the corresponding mode, and at the same time Operation in other modes is disabled.

In addition, the utility model also provides a circuit breaker including the above-mentioned control device. The circuit breaker is capable of independent functions in a separate mode by means of the control device, thereby completely distinguishing local operation from remote operation. With the help of the utility model, various states of the circuit breaker will not be combined together, so that the operator can clearly distinguish each working mode of the circuit breaker, so as not to cause confusion about the state of the driving mode.

While the embodiments shown in the drawings and described above are presently preferred, it should be understood that such embodiments are provided by way of example only. The invention is not intended to be limited to any particular embodiment, but extends to various modifications falling within the scope of the appended claims. Other modifications will be apparent to those skilled in the art.

Claims (10)

1. A circuit breaker control device (10), characterized in that: the control device (10) includes a control mechanism, and the control mechanism is used to occupy positions corresponding to manual mode, remote mode and lock mode; In any of the modes, the circuit breaker only performs the operation corresponding to the mode. 2. The control device (10) according to claim 1, characterized in that the control device (10) includes an on button (1) and an off button (2), and the on button (1) and Disconnect buttons (2) are respectively associated with said control mechanisms. 3. The control device (10) according to claim 1, characterized in that the control device (10) includes a selection mechanism (11), which is used to select the manual mode, remote mode and lock mode. 4. The control device (10) according to claim 1, characterized in that the control device (10) comprises a motor driver (40), which is connected with the on button (1) and the off button (2) Associated. 5. The control device (10) according to claim 1, characterized in that, the control mechanism is composed of a plurality of tie rods (3, 4, 5). 6 . The control device ( 10 ) according to claim 2 , characterized in that, corresponding connecting rods ( 21 , 22 ) are arranged under the on button ( 1 ) and the off button ( 2 ). 7. The control device (10) according to claim 5, characterized in that, in manual mode, the control mechanism is arranged to allow a tripping movement of the tie rods (3, 4, 5). 8. The control device (10) according to claim 5, characterized in that, in a locked mode or a remote mode, the control mechanism is arranged to inhibit the tripping movement of the tie rods (3, 4, 5). 9. The control device (10) according to Claim 2, characterized in that the control mechanism further comprises an additional mechanical locking mechanism, which mechanically locks the on button (1) in the locking mode. 10. A circuit breaker comprising a control device (10) according to any one of the preceding claims.

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