TWM647609U - Improvement device for keylock of electrically driven locking mechanism - Google Patents

Abstract

The main purpose of this invention is to improve the deficiencies and inconveniences of the switch safety lock device in the existing technical skills. It aims to enable remote long-distance locking functionality through electrical drive, addressing the inconvenience caused by the need for personnel to exchange keys over long distances. Additionally, it aims to solve the problem of different manufacturers around the world using various technical means to lock circuit breakers in different positions, which leads to increased production costs and management burdens.

The main technical features of this invention include designing a lock with a key, an externally mounted electrical drive device for locking the low-voltage circuit breaker's trip button switch, or an externally mounted electrical drive device for operating the handle of the low-voltage circuit breaker. These devices facilitate the locking operation of the circuit breaker in its closed, tripped, or locked state.

Description

Improved device for switch safety lock with electric drive locking method

This invention relates to an improved device for a switch safety lock in an electrically driven locking mode, especially a switch locking device that can improve electrical safety performance. The main purpose of this invention is to improve the switch safety lock device in the prior art. The lack and inconvenience of the remote long-distance locking function cannot be achieved by electrical drive, which improves the inconvenience caused by the problem of long-distance key replacement by personnel, and solves the problem that manufacturers around the world adopt in order to lock the circuit breaker at various positions. Different technical means must be used to produce a variety of different products, resulting in increased production costs and management burdens. Its main technical feature is to design a lock with a key, an external electrically driven low-voltage circuit breaker trip button switch locking device or an external electrically driven low-voltage circuit breaker operating handle device to close, open, open and lock the circuit breaker. Lock operation.

Based on the enthusiasm for improving industrial safety and on-site implementation experience, the applicant of this creation has developed a series of new innovations and creations on motor switches and power supply management. More than a dozen of these research and development results have applied for patents and been approved. In particular, the applicant of this invention has provided a series of practical motor switch locking device creations, which can be used in conjunction with motor switches of various brands and models, with good results. The applicant of this creation has this series of new innovations and creations regarding the safety of motor switches, which is a reference In the past, many electrical accidents at home and abroad occurred during the maintenance of motor machinery. The main reason was the lack of practical motor switch locking devices. However, there is no solution for improving the locking device applicable to various conditions.

The Institute of Labor Safety and Health of the Labor Committee of the Executive Yuan published a research report on "Electrical Safety Technical Information" published in 1999 and chaired by Su Wenyuan: "Electric induction accidents have always been one of the main causes of accidental injuries to workers and should be avoided as much as possible to protect worker safety. . The main reason for electric shock accidents is that public institutions and workers have insufficient awareness of electrical safety, which leads to potential dangers such as unsafe environments and unsafe behaviors at the work site." There are two main types of common electrical safety disasters. First, The first is from mechanical equipment that uses electricity, and the second is from negligence in electrical work. In order to remedy the lack of understanding of electrical safety by public institutions and workers and prevent hazards caused by electrical operations, Article 45 of the "Labor Safety and Health Facilities Rules" further mandates that employers use electrical machinery and equipment to have safety facilities. That is to say, for machinery that uses power to operate and poses obvious dangers, an emergency braking device with obvious signs should be installed at an appropriate location to immediately cut off the power and link with the braking system to quickly stop the operation of the machinery in an emergency. In addition, regarding the prevention of hazards caused by electrical work, during power outages, Article 254 of the "Labor Safety and Health Facilities Rules" stipulates that employers must not engage in work on the circuit, the circuit support, or access to the circuit after the circuit is open. When laying, constructing, inspecting, repairing, painting, etc. of work items, after confirming that the circuit is open, an open switch should be used for the circuit. During the operation, it should be "locked" or marked with "No power transmission" or "Power outage in progress." ” or set up facilities to be monitored by surveillance personnel. The first type of disaster caused by the use of electrical mechanical equipment is caused by the fact that most people have insufficient understanding of the principle of electrical safety interruption power. Although Article 254 of the "Labor Safety and Health Facilities Rules" further stipulates that switches with open circuits should be "locked" during operation, so far, the "locked" Regulations are often empty talk without actual implementation.

According to the international electrotechnical regulations NEC.422.31.(430.102)(440.14), the shunt switch or circuit breaker used as isolating equipment should have a locking device. The isolating equipment is located within the visual range of electrical appliances or can be locked when the circuit is open. The locking device mechanism should be placed in an appropriate position. Its regulatory principles and purposes are to prevent mistaken power transmission and reverse power transmission (as long as it does not affect public safety!):

1. Private indoor distribution boards do not need to be locked.

2. Electricity in public places must be locked.

3. The centralized motor control panel can be locked using the switch handle.

4. There will be dangerous situations after locking. Do not lock! The locking device is to prevent incorrect power supply, reverse power supply, etc. Because there are situations that are invisible to the eyes and may be dangerous, it is necessary to lock them during maintenance to ensure safety. In view of this, all switch manufacturers in the world produce related products. These include plug-in type, internal key type, etc. Similarly, in OSHA, fire laws and regulations, etc., there are mandatory regulations and penalties.

In special places, there are different requirements for switches. For example, in many dangerous places, such as chemical factories, gunpowder depots, gas and liquid factories, military facilities, etc., some electrical switches must be required during power transmission. When the switch is closed, it is not allowed to be accidentally touched or malfunctioned to open the circuit, causing serious losses. For example, if the furnace core is melting high-temperature and high-pressure liquid, it will cause irreparable consequences. Therefore, in some special places, the switch must be locked when the power is on ( Because of the above reasons, manufacturers of circuit breaker switches all over the world also have a device that locks the switch in the ON state and produce another product.

In special places and environments, some special functions are required. For example, in many unmanned computer rooms, the circuit breaker switches in certain circuits must prevent external force from malfunctioning. Power outages may occur, resulting in losses or even accidents. But for this circuit, when an accident occurs, whether it is overload, fault current, ground fault, etc., the circuit breaker must be tripped to avoid damage to the equipment or even a fire! Therefore, the requirements for the above-mentioned latching device are different from the above two states. One is forced to lock in the ON state when the power is turned on, and the other is forced to lock in the power-off state to turn off. The circuit breaker must be able to trip when there is a fault. to isolate accidents.

In many cases of actual power systems, there are many situations where it is necessary to make two circuit breakers lock each other, that is, two circuit breakers interlock, that is, only one of the two circuit breakers is energized, and both cannot be at the same time. Electrification may cause a short circuit accident. Under normal circumstances, most of the above situations use automatic transfer switches (also commonly known as ATS). However, two automatic transfer switches are usually placed side by side on the same chassis, and the circuit breakers must be of the same specification. In actual conditions, All flexible application methods have been lost. If the invention can be used to improve the locking method of the switch safety lock, the long-term inconvenience mentioned above can be solved. However, it must be able to achieve the function of electrical and mechanical locking to meet its safety requirements.

And when the three circuit breakers must be in the locked state, that is, the three circuit breakers are linked to the interlocking Tie function, that is, only two of the three circuit breakers are allowed to be closed and ON at the same time. If the improvement of the switch locking device of this invention can be used, , it can solve long-standing problems. And because it can be locked mechanically and electrically, its absolute reliability can be improved. And through the status contact output, it can be easily identified and increase the convenience and safety of use. This invention also improves the inconvenience and shortcomings of the patented M318184 patent for the locking device of the fuseless switch. It can only lock the trip position, although it meets the requirements of the locking device that must be able to be locked during power outage during maintenance. requirements, but cannot be applied to other situations with different functional requirements mentioned above. In the traditional art, the locking methods in various countries around the world include closing ON and opening and closing OFF. Different methods require different locks and components, which have led to many locking methods. The implementation of heavy safety locks will increase production costs, increase the burden on product management, and cause trouble to owners. The above problems have existed for a long time, and domestic and foreign manufacturers have been unable to properly solve these problems to improve the safety of electrical equipment and operations.

The main purpose of this creation is to improve the lack and inconvenience of the switch safety lock locking device in the conventional technology. It cannot achieve the remote long-distance locking function by electrical drive, and improve the inconvenience caused by the problem of personnel replacing keys over long distances. It is convenient and solves the problem that manufacturers around the world must use different technical means to manufacture various products in different styles in order to lock circuit breakers at various positions, resulting in increased production costs and management burdens. Its main technical feature is to design a lock with a key, an external electrically driven low-voltage circuit breaker trip button switch locking device or an external electrically driven low-voltage circuit breaker operating handle device to close, open, open and lock the circuit breaker. Lock operation.

In order to achieve the above purpose, this invention creates a switch safety lock improvement device with an electrically driven locking method. In order to improve the conventional technology, the locking operation of the circuit breaker in the closing, opening and closing states can be achieved in an electrically driven manner and complies with the Electricity Act. In accordance with the requirements of laws and regulations on consumer electrical equipment installations, a lock with a key device can be installed. The lock with a key device can be an independent and distributed type or a combination of multiple locks with a key device. When the key-attached device of the lock is activated, the external electrically driven low-voltage circuit breaker trip button switch locking device can be activated or the external electrically driven low-voltage circuit breaker operating handle device can be activated to close, open, open, and lock the circuit breaker. Lock operation function.

In order to achieve the above purpose, this invention creates a switch safety lock improvement device with an electrically driven locking method. In order to improve the conventional technology, the circuit breaker cannot use the shunt trip coil device to lock the tripping position of the circuit breaker, or the circuit breaker cannot use insufficient power to lock the tripping position. The voltage trip coil device is powered on for a long time This may cause the problem of the insufficient voltage trip coil being burned out. Moreover, in the conventional art, the above devices are all internally connected inside the circuit breaker. When the above two trip coils fail, it will cause the trip coil to operate or not operate and the trip cannot be blocked. Or the internal tripping mechanism of the circuit breaker is blocked, causing the circuit breaker to be completely disabled. In order to solve the above problems, this invention provides an external electrically driven low-voltage circuit breaker trip button switch locking device. The external electrically driven low-voltage circuit breaker trip button switch locking device is arranged next to the circuit breaker and outside the circuit breaker. The operation will not affect any internal functions of the circuit breaker and can be operated manually in an emergency, in order to comply with the statutory provisions in the Electrical Equipment and Installation Regulations of the Electricity Act. The locking device of the circuit breaker can be destroyed or destroyed in an emergency. It can be handled urgently to avoid affecting the safety of electricity.

In order to achieve the above purpose, this invention creates an improved device for electrically driven locking switch safety locks. In order to improve the conventional technology, which cannot electrically drive the circuit breaker to the closed and open positions and achieve the positioning locking function, this invention The improved device of the switch safety lock in the electrically driven locking mode can be provided with an external electrically driven low-voltage circuit breaker operating handle device. The external electrically driven low-voltage circuit breaker operating handle device is provided next to the circuit breaker and actuates outside the circuit breaker. , will not affect any function inside the circuit breaker. The electric motor used in the external electrically driven low-voltage circuit breaker operating handle device can be a stepper motor or a servo motor. When the external electrically driven low-voltage circuit breaker operating handle device is activated When reaching the closed or open position, the positioning locking function can be achieved.

An improved device for electrically driven locking switch safety locks, which mainly includes an attached locking selector switch and an external electrically driven low-voltage circuit breaker trip button switch locking device; the attached locking selector switch and the external electrical The driving low-voltage circuit breaker trip button switch locking device is electrically connected. When the attached locking selector switch is activated, the external electric drive The low-voltage circuit breaker trip button switch locking device is activated; the external electrically driven low-voltage circuit breaker trip button switch locking device includes an external power input unit, an electric motor drive unit with an electronic driver, and a linked pressing unit. The external power supply The input unit is electrically connected by an external power supply to provide electric energy to actuate the electrically driven locking switch safety lock improvement device. The electric motor drive unit with an electronic driver is actuated by the external power input unit according to the attached locking selector switch. Provide power to operate an electronic driver inside the electric motor drive unit with an electronic driver. When the electronic driver is activated, it drives an electric motor of the electric motor drive unit with the electronic driver. The electric motor is connected to the linked pressing unit. The interlocking pressing unit acts in conjunction with the electric motor drive unit equipped with an electronic driver to activate the locking function by pressing down or returning upward to release the locking function; wherein the switch safety lock improvement device of the electrically driven locking method can be set next to a low-voltage circuit breaker , when the attached locking selector switch actuates to the locking position, the electric motor drive unit with an electronic driver provides power from the external power input unit to actuate the linkage pressing unit, and when the linkage pressing unit presses the low-voltage circuit breaker downward When a trip test button is pressed, a trip mechanism inside the low-voltage circuit breaker is linked to achieve the function of electrical drive locking to complete the locking. When the attached locking selector switch is in the inactive position, the electric circuit breaker with an electronic driver The motor drive unit is powered by the external power input unit to activate the linkage pressing unit. When the linkage pressing unit returns upward to release the lock, the trip test button of the low-voltage circuit breaker returns and releases to link the tripping mechanism inside the low-voltage circuit breaker. , to achieve the function of unlocking and unlocking.

An improved device for electrically driven locking switch safety locks, which mainly includes a lockable closing and opening and closing selector switch and an external electrically driven low-voltage circuit breaker operating handle device; the lockable closing and opening and closing selector switches are connected with the The operating handle device of the external electrically driven low-voltage circuit breaker is electrically connected. When the locking closing and opening selector switch is activated, the external electrically driven low voltage circuit breaker The external electrically driven low-voltage circuit breaker operating handle device is activated; the external electrically driven low-voltage circuit breaker operating handle device includes: an external power input unit, an electric motor drive unit with an electronic driver, and a linked low-voltage circuit breaker operating handle. The external power input unit An external power supply is electrically connected to provide electric energy to operate the electrically driven locking switch safety lock improvement device. The electric motor drive unit with an electronic driver is actuated by the external power supply in accordance with the locking closing and opening selector switch. The unit provides power to operate an electronic driver inside the electric motor drive unit with an electronic driver. When the electronic driver is activated, it drives an electric motor 2 of the electric motor drive unit with an electronic driver. The electric motor 2 is connected to the linked low-voltage circuit breaker. The operating handle of the linked low-voltage circuit breaker operates in conjunction with the electric motor to close the low-voltage circuit breaker toward the power side of the low-voltage circuit breaker or to open and close the low-voltage circuit breaker toward the load side of the low-voltage circuit breaker; wherein The electrically driven locking switch safety lock improvement device can be installed next to the low-voltage circuit breaker. When the locking closing and opening-off selection switch is actuated to the closed position, the electric motor drive unit with an electronic driver is driven by the The external power input unit provides power to actuate the electric motor 2. When the electric motor 2 actuates the operating handle of the linked low-voltage circuit breaker to the power side of the low-voltage circuit breaker, the closing function is achieved. When the locking closing and opening-off selection switch actuates to In the on-off position, the electric motor drive unit equipped with an electronic driver is powered by the external power input unit to operate the electric motor 2. When the electric motor 2 actuates the operating handle of the linked low-voltage circuit breaker to the load side of the low-voltage circuit breaker, it is achieved. On/off function.

1: Improved device for switch safety lock with electric drive locking method

11: Attached locking selector switch

12: External electrically driven low-voltage circuit breaker trip button switch locking device

13:External power input unit

14: Electric motor drive unit with electronic driver

15: Linked pressing unit

16:Electronic driver

17: Electric motor one

18:Low voltage circuit breaker

19: Escape test button

20: Breaking out of the organization

21: External electrically driven low-voltage circuit breaker operating handle device

22: Lockable closing, opening and closing selector switch

23: Linked low-voltage circuit breaker operating handle

24: Electric motor two

25:Power side of low voltage circuit breaker

26:Load side of low voltage circuit breaker

[Figure 1] This is a schematic configuration diagram of the first embodiment of an improved device for switch safety locks with electrically driven locking methods.

[Figure 2] This is the second implementation of an improved device for switch safety locks with electrically driven locking methods. Example configuration diagram

The first implementation example of an improved electrically driven locking switch safety lock device 1 of this invention is shown in Figure 1. It mainly includes an attached locking selector switch 11 and an external electrically driven low-voltage circuit breaker trip button switch lock. Device 12; the locking selection switch 11 is electrically connected to the external electrically driven low-voltage circuit breaker trip button switch locking device 12. When the locking selection switch 11 is activated, the external electrically driven low-voltage circuit breaker trips. The trip button switch locking device 12 is activated; the external electrically driven low-voltage circuit breaker trip button switch locking device 12 includes an external power input unit 13, an electric motor drive unit 14 with an electronic driver, and a linked pressing unit 15. The external The power input unit 13 is electrically connected to an external power supply to provide electric energy to operate the electrically driven locking switch safety lock improvement device 1. The electric motor driving unit 14 with an electronic driver is actuated by the attached locking selector switch 11. The external power input unit 13 provides power to operate an electronic driver 16 inside the electric motor drive unit 14 with an electronic driver. When the electronic driver 16 is activated, it drives an electric motor 17 of the electric motor drive unit 14 with an electronic driver. The electric motor 17 is connected to the interlocking pressing unit 15. The interlocking pressing unit 15 acts in conjunction with the electric motor drive unit 14 equipped with an electronic driver to activate the locking function of pressing down or returning upward to release the locking function; wherein the electrically driven locking method The switch safety lock improvement device 1 can be arranged next to a low-voltage circuit breaker 18. When the latching lock selection switch 11 is actuated to the locking position, the electric motor drive unit 14 with an electronic driver is driven by the external power input unit 13 Power is provided to activate the linkage pressing unit 15. When the linkage pressing unit 15 presses down a trip test button 19 of the low-voltage circuit breaker 18, a tripping mechanism 20 inside the low-voltage circuit breaker 18 is linked to achieve the electrical drive. The lock completes the locking function. When the attached locking type is selected When the switch 11 is in the non-activated position, the electric motor driving unit 14 with an electronic driver provides power from the external power input unit 13 to actuate the interlocking pressing unit 15. When the interlocking pressing unit 15 returns upward to unlock, the low-voltage circuit breaker 18 The reset and release of the trip test button 19 links the trip mechanism 20 inside the low-voltage circuit breaker 18 to achieve the function of unlocking and locking.

The second implementation example of the electrically driven locking switch safety lock improvement device 1 of this invention is shown in Figure 2. It mainly includes a lockable closing and opening selector switch 22 and an external electrically driven low-voltage circuit breaker operating handle. Device 21; the lockable closing and opening and closing selector switch 22 is electrically connected to the external electrically driven low-voltage circuit breaker operating handle device 21. When the lockable closing and opening and closing selector switch 22 is activated, the external electrically driven The low-voltage circuit breaker operating handle device 21 is activated; the external electrically driven low-voltage circuit breaker operating handle device 21 includes: an external power input unit 13, an electric motor drive unit 14 with an electronic driver, and a linked low-voltage circuit breaker operating handle 23. The external power input unit 13 is electrically connected to the external power supply to provide electric energy to operate the electrically driven locking switch safety lock improvement device 1. The electric motor drive unit 14 with an electronic driver is closed, opened and closed in accordance with the locking type. When the selection switch 22 is activated, the external power input unit 13 provides power to activate an electronic driver 16 inside the electric motor drive unit 14 with an electronic driver. When the electronic driver 16 is activated, it drives one of the electric motor drive units 14 with an electronic driver. The second electric motor 24 is connected to the interlocking low-voltage circuit breaker operating handle 23. The interlocking low-voltage circuit breaker operating handle 23 moves in conjunction with the second electric motor 24, and moves the low-voltage circuit breaker to the power side 25 of the low-voltage circuit breaker. 18 closes or activates the function of opening and breaking the low-voltage circuit breaker 18 to the load side 26 of the low-voltage circuit breaker; the switch safety lock improvement device 1 of the electrically driven locking mode can be set next to the low-voltage circuit breaker 18. When the attached When the lock-type closing and opening-off selection switch 22 is actuated to the closed position, the electric motor drive unit 14 with an electronic driver is driven by the external electric motor. The source input unit 13 provides power to actuate the electric motor 24. When the electric motor 24 actuates the linked low-voltage circuit breaker operating handle 23 to the low-voltage circuit breaker power side 25, the closing function is achieved. When the locking type is closed, opened and closed, When the selector switch 22 actuates to the on-off position, the electric motor drive unit 14 with an electronic driver provides power from the external power input unit 13 to actuate the second electric motor 24. When the second electric motor 24 actuates the linked low-voltage circuit breaker operating handle When 23 reaches the load side 26 of the low-voltage circuit breaker, the on-off function is achieved.

In summary, this invention has created an improved device for switch safety locks with electrically driven locking methods, which further improves the stability and safety of the circuit breaker panel in the power supply system and has great industrial applicability. Furthermore, after checking the related products on the market and approved patent announcements, we found no products with the same essential technical features as this creation, which also meet the statutory patent application requirements of novelty and advancement. I have filed a patent application in accordance with the law, and I sincerely request your review committee to grant the patent in this case as soon as possible to ensure the rights and interests of the applicant. However, what is disclosed in this case is only a preferred embodiment of this invention and cannot be used to limit the scope of rights of this invention. Any equivalent changes or modifications made in accordance with the spirit of this invention are still covered by the patent application scope of this invention. middle.

1: Improved device for switch safety lock with electric drive locking method

11: Attached locking selector switch

12: External electrically driven low-voltage circuit breaker trip button switch locking device

13:External power input unit

14: Electric motor drive unit with electronic driver

15: Linked pressing unit

16:Electronic driver

17: Electric motor one

18:Low voltage circuit breaker

19: Escape test button

20: Breaking out of the organization

Claims (2)

An improved device for electrically driven locking switch safety locks, which mainly includes an attached locking selector switch and an external electrically driven low-voltage circuit breaker trip button switch locking device; the attached locking selector switch and the external electrical The external electrically driven low-voltage circuit breaker trip button switch and locking device is electrically connected. When the locking selector switch is actuated, the external electrically driven low-voltage circuit breaker trip button switch and locking device is actuated; the external electrically driven low-voltage circuit breaker trip button The switch locking device includes an external power input unit, an electric motor drive unit with an electronic driver, and a linked pressing unit. The external power input unit is electrically connected by an external power supply to provide electric energy to actuate the switch safety lock of the electrically driven locking method. As the power source of the device, the electric motor drive unit with an electronic driver operates according to the latch-type locking selector switch. The external power input unit provides power to operate an electronic driver inside the electric motor drive unit with an electronic driver. The electronic driver operates. When driving an electric motor of the electric motor driving unit with an electronic driver, the electric motor is connected to the interlocking pressing unit, and the interlocking pressing unit acts in conjunction with the electric motor driving unit having an electronic driver, and presses down to lock or Reset upward to release the locking function; The improved device of the electrically driven locking switch safety lock can be placed next to a low-voltage circuit breaker. When the attached locking selector switch is actuated to the locking position, the electric motor drive unit with an electronic driver is powered by the external power supply. The input unit provides power to actuate the linkage pressing unit. When the linkage pressing unit presses down a trip test button of the low-voltage circuit breaker, a tripping mechanism inside the low-voltage circuit breaker is linked to achieve the locking of the electrical appliance drive. function, when the latching selector switch is in the inactive position, the electrical The electric motor drive unit of the sub-driver is powered by the external power input unit to operate the linkage pressing unit. When the linkage pressing unit returns upward to release the lock, the trip test button of the low-voltage circuit breaker returns and releases the linkage inside the low-voltage circuit breaker. The tripping mechanism achieves the function of unlocking and unlocking. An improved device for electrically driven locking switch safety locks, which mainly includes a lockable closing and opening and closing selector switch and an external electrically driven low-voltage circuit breaker operating handle device; the lockable closing and opening and closing selector switches are connected with the The external electrically driven low-voltage circuit breaker operating handle device is electrically connected. When the locking closing and opening selector switch is activated, the external electrically driven low-voltage circuit breaker operating handle device is activated; the external electrically driven low-voltage circuit breaker operating handle is activated. The device includes: an external power input unit, an electric motor drive unit with an electronic driver, and a linked low-voltage circuit breaker operating handle. The external power input unit is electrically connected to the external power supply to provide electrical energy to actuate the switch safety of the electrically driven locking method. The power supply of the lock improvement device. The electric motor drive unit with an electronic driver operates according to the lock-type closing and opening selector switch. The external power input unit provides power to operate an electronic driver inside the electric motor drive unit with an electronic driver. , when the electronic driver is activated, it drives an electric motor 2 of the electric motor drive unit with an electronic driver. The electric motor 2 is connected to the linked low-voltage circuit breaker operating handle, and the linked low-voltage circuit breaker operating handle is linked to move according to the two electric motors. The function of activating the low-voltage circuit breaker to the power side of the low-voltage circuit breaker to close the low-voltage circuit breaker or activating the low-voltage circuit breaker to the load side of the low-voltage circuit breaker; wherein the electrically driven locking mode switch safety lock improvement device can be installed on the low-voltage circuit breaker Next to the device, when the locking closing and opening and closing selector switches are moved to the closed position, the device The electric motor drive unit equipped with an electronic driver is powered by the external power input unit to operate the electric motor 2. When the electric motor 2 actuates the operating handle of the linked low-voltage circuit breaker to the power side of the low-voltage circuit breaker, the closing function is achieved. When the attached When the lock-type closing and on-off selector switches are actuated to the on-off position, the electric motor drive unit with an electronic driver is provided with power by the external power input unit to actuate the electric motor two. When the electric motor two actuates, the linked low-voltage circuit breaker operates. When the handle reaches the load side of the low-voltage circuit breaker, the on-off function is achieved.

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