Universal circuit breaker with electrical locking device

Abstract

The utility model provides a universal circuit breaker with an electrical locking device. The universal circuit breaker comprises an under-voltage release, a circuit breaker mechanism and a key switch, a wiring terminal at one end of the key switch is connected to a wire inlet power supply side, a wiring terminal at the other end of the key switch is connected to the under-voltage release, and the under-voltage release is installed on the circuit breaker mechanism; in a working state, the key switch is in a switch-on position, wiring terminals at two ends of the key switch form normally closed contacts, and the under-voltage release is in a power-on state; and in the opening locking state, the key switch is in the off position, the wiring terminals at the two ends of the key switch form normally open contacts, and the under-voltage release is in a power-off state. According to the utility model, the key switch is connected in series between the inlet wire power supply and the under-voltage release, a mechanical opening locking device is not required to be additionally arranged, the opening locking function can be realized through the under-voltage release only by additionally arranging the key switch, the safety of the product is improved, and compared with the traditional opening locking device, the opening locking device has the advantages of low cost, convenience in installation, multiple functions and the like.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a universal circuit breaker with an electrical locking device. Background Technology

[0002] Universal circuit breakers (hereinafter referred to as circuit breakers) are important components of low-voltage electrical appliances. Existing circuit breaker tripping and locking schemes all require the installation of mechanical tripping key locking devices, which are relatively cumbersome to install.

[0003] The undervoltage release is a crucial electrical accessory for circuit breakers. Its function is to release its core when the line voltage Ue drops to 35%–70% of Ue, triggering the circuit breaker's trip shaft and causing the circuit breaker to trip instantaneously. When the system voltage drops below 35% Ue to 0, the undervoltage release locks the circuit breaker mechanism, preventing it from closing. Developing a device that uses the working principle of an undervoltage release to achieve electrical locking of the circuit breaker during tripping is a pressing issue that needs to be addressed to meet the requirements of convenient installation and lightweight design of circuit breakers.

[0004] Patent document CN206727040U discloses a mechanical lock mechanism for tripping interlocking of a universal circuit breaker. It includes a control panel located on the front face of the circuit breaker housing, a manual tripping button on the control panel, and a mechanical lock plate connected to the button that extends synchronously from the control panel during tripping. An elongated hole is formed in the protrusion of the mechanical lock plate extending from the control panel. A lock is fixed to the front face of the control panel, comprising a lock housing, a lock cylinder for inserting a key, and a lock rod driven by the lock cylinder. A locking plate is fixed to the lock rod to prevent the mechanical lock plate from resetting after tripping and is inserted into the elongated hole. While this invention improves the safety performance of the universal circuit breaker to some extent, it requires the installation of a mechanical lock, making installation relatively cumbersome. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a universal circuit breaker with an electrical locking device.

[0006] The universal circuit breaker with an electrical locking device provided by this utility model includes an undervoltage release device, a circuit breaker mechanism, and a key switch.

[0007] One end of the key switch is connected to the incoming power supply side, and the other end of the key switch is connected to the undervoltage release device, which is mounted on the circuit breaker mechanism.

[0008] Operating status: The key switch is in the ON position, the terminals at both ends of the key switch form normally closed contacts, and the undervoltage release is in the energized state;

[0009] Open circuit lockout state: The key switch is in the open position, the terminals at both ends of the key switch form normally open contacts, and the undervoltage release is in a de-energized state.

[0010] Preferably, the key switch includes a rotary switch, which has a trip lock position and a working position;

[0011] When the key switch is in the open lock position, the terminals at both ends of the key switch form normally open contacts; when the key switch is in the working position, the terminals at both ends of the key switch form normally closed contacts.

[0012] Preferably, the key switch includes a first terminal block, a second terminal block, a third terminal block, and a fourth terminal block;

[0013] Both the first and second terminals are connected to the incoming power supply side, and both the third and fourth terminals are connected to the undervoltage release device.

[0014] The first terminal and the third terminal form a first set of contacts, and the second terminal and the fourth terminal form a second set of contacts. In the working state, both the first set of contacts and the second set of contacts are normally closed contacts. In the trip-locked state, both the first set of contacts and the second set of contacts are normally open contacts.

[0015] Preferably, the key switch includes a LAY39 switch.

[0016] Preferably, a face shield is installed on one side of the circuit breaker mechanism, and the key switch is mounted on the face shield.

[0017] Preferably, the undervoltage release is disposed inside the faceplate and mounted on the mounting plate of the circuit breaker mechanism.

[0018] Preferably, the key socket of the key switch and the wiring terminal at one end of the key switch are both located on the side of the mask away from the circuit breaker mechanism;

[0019] The terminal block at one end of the key switch is connected to the incoming power supply side via a connecting wire.

[0020] Preferably, the wiring terminal at the other end of the key switch is located inside the mask and is connected to the undervoltage release device via a connecting wire.

[0021] Preferably, the operating voltage of the undervoltage release device is 35% to 70% of the rated voltage of the circuit breaker mechanism;

[0022] When the system voltage of the circuit breaker mechanism is lower than 35% of the rated voltage, the undervoltage release device will lock the circuit breaker mechanism to prevent the circuit breaker from closing.

[0023] Preferably, it further includes a status indicator module, which is mounted on the mask;

[0024] The status indicator module is linked to the key switch. When the terminals at both ends of the key switch form normally closed contacts, the status indicator module displays the working status. When the terminals at both ends of the key switch form normally open contacts, the status indicator module displays the tripped lockout status.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] This utility model provides an electrical tripping lock device for a universal circuit breaker. A key switch is connected in series between the incoming power supply and the undervoltage release device. The circuit breaker tripping is electrically locked by means of the working principle of the undervoltage release device. There is no need to install a mechanical tripping lock device. Only the key switch needs to be installed to realize the tripping lock function, which improves the safety of the product. Compared with traditional tripping lock devices, it has the advantages of low cost, convenient installation and multiple functions. Attached Figure Description

[0027] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the electrical principle of this utility model;

[0029] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 3 This is a structural schematic diagram of the present invention viewed from the front.

[0031] The diagram shows:

[0032] Undervoltage release 1 First terminal 41

[0033] Circuit breaker mechanism 2 Second terminal 42

[0034] Face mask 3 Third terminal 43

[0035] Key switch 4, fourth terminal 44 Detailed Implementation

[0036] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0037] This utility model discloses a universal circuit breaker with an electrical locking device. A key switch is connected in series between the incoming power supply and the undervoltage release device. The circuit breaker is electrically locked when it is tripped by the working principle of the undervoltage release device. There is no need to install a mechanical tripping locking device. Only the key switch needs to be installed to achieve the tripping locking function, which improves the safety of the product. Compared with traditional tripping locking devices, it has the advantages of low cost, convenient installation and multiple functions.

[0038] The universal circuit breaker with an electrical locking device provided by this utility model includes an undervoltage release device 1, a circuit breaker mechanism 2, and a key switch 4; as shown... Figure 1 The diagram shown is an electrical schematic of the electrical locking device. One end of the key switch 4 is connected to the incoming power supply side, and the other end of the key switch 4 is connected to the undervoltage release device 1. The undervoltage release device 1 is mounted on the circuit breaker mechanism 2.

[0039] Specifically, the key switch 4 includes a rotary switch, which has a trip lock position and a working position; when the key switch 4 is in the trip lock position, the terminals at both ends of the key switch 4 form normally open contacts, and when the key switch 4 is in the working position, the terminals at both ends of the key switch 4 form normally closed contacts. Figure 1 As shown, the key switch 4 includes a first terminal 41, a second terminal 42, a third terminal 43, and a fourth terminal 44. The first terminal 41 and the second terminal 42 are both connected to the incoming power supply side, and the third terminal 43 and the fourth terminal 44 are both connected to the undervoltage release device 1. The first terminal 41 and the third terminal 43 form a first set of contacts, and the second terminal 42 and the fourth terminal 44 form a second set of contacts. In the working state, both the first and second sets of contacts are normally closed contacts; in the tripped and locked state, both the first and second sets of contacts are normally open contacts. In a preferred embodiment, the key switch 4 includes a LAY39 switch or a similar product.

[0040] like Figure 2 , Figure 3The diagram shows the installation structure of this utility model. A faceplate 3 is installed on one side of the circuit breaker mechanism 2, and the key switch 4 is installed on the faceplate 3. The undervoltage release 1 is located inside the faceplate 3 and is installed on the mounting plate of the circuit breaker mechanism 2. The key socket and the wiring terminal at one end of the key switch 4 are both located on the side of the faceplate 3 away from the circuit breaker mechanism 2; the wiring terminal at one end of the key switch 4 is connected to the incoming power supply side via a connecting wire. The wiring terminal at the other end of the key switch 4 is located inside the faceplate 3 and is connected to the undervoltage release 1 via a connecting wire.

[0041] In a preferred embodiment, the operating voltage of the undervoltage release 1 is 35% to 70% of the rated voltage of the circuit breaker mechanism 2; when the system voltage of the circuit breaker mechanism 2 is lower than 35% of the rated voltage, the undervoltage release 1 locks the circuit breaker mechanism 2 to prevent the circuit breaker from closing.

[0042] In a preferred embodiment, the universal circuit breaker with an electrical locking device further includes a status indicator module, which is mounted on the faceplate 3. The status indicator module is linked to the key switch 4. When the terminals at both ends of the key switch 4 form normally closed contacts, the status indicator module displays the working status. When the terminals at both ends of the key switch 4 form normally open contacts, the status indicator module displays the tripped and locked status. Preferably, the status indicator module includes a mechanical indicator window or status indicator light linked to the key switch 4.

[0043] The working principle of this utility model is as follows:

[0044] When the circuit breaker mechanism 2 is in normal working condition, the key switch 4 is in the ON position (represented by symbol I), the terminals at both ends of the key switch 4 are converted to normally closed contacts, and the undervoltage release device 1 is in the energized state. At this time, the circuit breaker mechanism 2 is in normal working condition and can be operated normally for closing and opening.

[0045] When the circuit breaker mechanism 2 is in the open-locked state, the key switch 4 is in the open position (represented by symbol O), the terminals at both ends of the key switch 4 are converted to normally open contacts, and the undervoltage release 1 is in a non-energized state. According to the working principle of the undervoltage release 1, when the undervoltage release 1 is not energized, the circuit breaker mechanism 2 is in the open-locked state. At this time, the circuit breaker mechanism 2 cannot be closed by manual mechanical closing operation or remote electrical closing operation, and the circuit breaker mechanism 2 is always in the open-locked state.

[0046] Working principle of circuit breaker emergency power-off state: When an abnormality occurs at the power supply site, it is often necessary to cut off the power supply of the circuit breaker in an emergency to avoid power accidents. When the circuit breaker mechanism 2 is in the normal working state described above, the operation of switching to the open locking state is performed by rotating the key switch 4 to change it from the on position I to the off position O. This causes the undervoltage release device 1 to lose power momentarily, and the undervoltage release device 1 will instantly trigger the trip shaft of the circuit breaker mechanism 2, thus achieving instantaneous power-off of the circuit breaker mechanism 2.

[0047] This utility model uses the working principle of the undervoltage release device of the circuit breaker to realize the electrical locking of the circuit breaker when it is tripped. It can be achieved simply by adding a key switch, without the need for a mechanical tripping key locking device. At the same time, it can also realize the emergency power cut-off function. Compared with the traditional tripping locking device, it has the advantages of low cost, convenient installation and multiple functions.

[0048] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A universal circuit breaker with an electrical locking device, characterized in that, It includes an undervoltage release device (1), a circuit breaker mechanism (2), and a key switch (4); One end of the key switch (4) is connected to the incoming power supply side, and the other end of the key switch (4) is connected to the undervoltage release device (1). The undervoltage release device (1) is installed on the circuit breaker mechanism (2). Working state: The key switch (4) is in the ON position, the terminals at both ends of the key switch (4) form normally closed contacts, and the undervoltage release device (1) is in the energized state; Opening lockout state: The key switch (4) is in the open position, the terminals at both ends of the key switch (4) form normally open contacts, and the undervoltage release device (1) is in the de-energized state.

2. The universal circuit breaker with an electrical locking device according to claim 1, characterized in that, The key switch (4) includes a rotary switch, which includes a trip lock position and a working position; When the key switch (4) is in the open lock position, the terminals at both ends of the key switch (4) form normally open contacts. When the key switch (4) is in the working position, the terminals at both ends of the key switch (4) form normally closed contacts.

3. The universal circuit breaker with an electrical locking device according to claim 2, characterized in that, The key switch (4) includes a first terminal (41), a second terminal (42), a third terminal (43), and a fourth terminal (44); The first terminal (41) and the second terminal (42) are both connected to the incoming power supply side, and the third terminal (43) and the fourth terminal (44) are both connected to the undervoltage release device (1); The first terminal (41) and the third terminal (43) form a first set of contacts, and the second terminal (42) and the fourth terminal (44) form a second set of contacts. In the working state, both the first set of contacts and the second set of contacts are normally closed contacts. In the tripping and locking state, both the first set of contacts and the second set of contacts are normally open contacts.

4. The universal circuit breaker with an electrical locking device according to claim 1, characterized in that, The key switch (4) includes a LAY39 switch.

5. The universal circuit breaker with an electrical locking device according to claim 1, characterized in that, A face shield (3) is installed on one side of the circuit breaker mechanism (2), and the key switch (4) is installed on the face shield (3).

6. The universal circuit breaker with an electrical locking device according to claim 5, characterized in that, The undervoltage release device (1) is located inside the face shield (3) and is mounted on the mounting plate of the circuit breaker mechanism (2).

7. The universal circuit breaker with an electrical locking device according to claim 6, characterized in that, The key socket of the key switch (4) and the wiring terminal at one end of the key switch (4) are both located on the side of the mask (3) away from the circuit breaker mechanism (2); The terminal block at one end of the key switch (4) is connected to the incoming power supply side via a connecting wire.

8. The universal circuit breaker with an electrical locking device according to claim 6, characterized in that, The wiring terminal at the other end of the key switch (4) is located inside the mask (3) and is connected to the undervoltage release device (1) via a connecting wire.

9. The universal circuit breaker with an electrical locking device according to claim 1, characterized in that, The operating voltage of the undervoltage release device (1) is 35% to 70% of the rated voltage of the circuit breaker mechanism (2); When the system voltage of the circuit breaker mechanism (2) is lower than 35% of the rated voltage, the undervoltage release device (1) locks the circuit breaker mechanism (2) to prevent the circuit breaker from closing.

10. The universal circuit breaker with an electrical locking device according to claim 5, characterized in that, It also includes a status indicator module, which is mounted on the mask (3); The status indicator module is linked with the key switch (4). When the terminals at both ends of the key switch (4) form normally closed contacts, the status indicator module displays the working status. When the terminals at both ends of the key switch (4) form normally open contacts, the status indicator module displays the tripped lockout status.

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