TWI839219B - Improved device for preventing accidental power outage during fire alarm, firefighting, and emergency equipment operation - Google Patents

Abstract

The main purpose of the present invention is to provide a device that can be used to prevent accidental power outage during the operation of fire alarms, firefighting, and emergency equipment. The improved device for preventing accidental power outage is connected to both the power and load sides of a main low-voltage circuit breaker. When the main circuit breaker is closed and the fire alarms, firefighting, and emergency equipment are activated, the device prevents power interruption caused by the circuit breaker tripping. If the fire alarms, firefighting, and emergency equipment return to normal operation without activation, the device will not cause tripping under loaded conditions when the main circuit breaker is closed and the improved device for preventing accidental power outage is enabled.

The improved device for preventing accidental power outage during fire alarms, firefighting, and emergency equipment operation includes improvements to the traditional practice of using a general low-voltage circuit breaker. In traditional practice, if there is a fault such as an overload or short circuit in the electrical circuit during a fire, the low-voltage circuit breaker would trip, causing power interruption. If an electromechanical automatic switching device were used as an isolation device, the fault would not trip and the accident could not be isolated. The present invention solves this problem by connecting a gate switch with an electric operator or a low-voltage switch with no tripping device to the main low-voltage circuit breaker, and setting up a fire alarm, firefighting, and emergency equipment power state control unit and an automatic switch control unit. When the main low-voltage circuit breaker is closed and a fire occurs, the low-voltage switch with no tripping device is closed. When the fire is extinguished and the main low-voltage circuit breaker is closed, the low-voltage switch with no tripping device is opened, meeting regulatory requirements and providing electrical safety. The present invention offers a simple, safe, and reliable design that ensures uninterrupted power supply and improves the safety of electrical equipment power supply and use.

Description

Improved device for preventing accidental power failure of fire alarm and emergency equipment

The main purpose of the present invention is to provide a device for preventing a false power outage when a fire alarm, fire fighting and emergency equipment is actuated. The improved device for preventing a false power outage of a fire alarm, fire fighting and emergency equipment is connected to the power supply side and the load side of a main low-voltage circuit breaker. When the main circuit breaker is closed and the fire alarm, fire fighting and emergency equipment is actuated, the device is closed to prevent a power outage caused by the main circuit breaker tripping and power outage. In this case, when the fire alarm and emergency equipment does not operate and returns to normal, the main circuit breaker is closed and the improved device for preventing the fire alarm and emergency equipment from being disconnected by mistake is activated, so that it will not be disconnected under load. The improved device for preventing the fire alarm and emergency equipment from being disconnected by mistake includes an improvement in the conventional technology of using a general low-voltage circuit breaker in the event of a fire if there is a fault in the power circuit such as overload or short circuit. The low voltage circuit breaker will trip and cut off the power. If the excitation electric automatic switching switch is used as the isolation device, the fault cannot trip and cut off the power to isolate the accident. This is its defect. The present invention connects a gate switch with an electric operator or a low voltage switch without a tripping function without a tripping element to a main low voltage circuit breaker, and sets a fire alarm and emergency equipment power status control unit, and sets an automatic switching control unit. The unit, when the main low-voltage circuit breaker is closed and a fire occurs, the low-voltage switch without tripping function is put into closing. When the fire is relieved and the main low-voltage circuit breaker is closed, the low-voltage switch without tripping function is opened, meeting the regulatory requirements and power safety functions of regulations, providing a simple, safe and reliable structure, ensuring uninterrupted power supply, and improving the safety of power supply and use of electrical equipment.

According to the revised version of Article 841 of the User Electrical Equipment Installation Rules, the circuits supplying power to the motor driving the fire pump shall be monitored to prevent inadvertent isolation of the following specified connections: 3. Isolation equipment dedicated to the fire pump load: (i) The isolation equipment used for the regular power supply shall be the user's main switch and can be locked in the closed position. It shall be located within the range of the fire pump load equipment and away from other buildings or other fire pump power isolation equipment, and at a sufficient distance to prevent accidental simultaneous operation. (ii) When the on-site backup generator is used as a backup power source, its wiring shall comply with the emergency power circuit regulations of Article 976, paragraph 2, and the isolation equipment shall be lockable in the closed position. When a fire occurs, no matter the user is powered by the mains in a normal state or by a backup generator when the mains fails, there must be power to supply the firefighting equipment to prevent the disaster from expanding and causing loss of personnel and property. Generally, most of the isolation equipment that supplies power to the firefighting equipment uses a low-voltage circuit breaker, which can protect the overcurrent components when the line is short-circuited and the equipment is overloaded. When in an abnormal state, the circuit breaker trips and cuts off the power to isolate the accident. Therefore, the low-voltage circuit breaker used in the general traditional power circuit cannot be forced to close and supply power to the firefighting equipment when a fire occurs. This is a problem that cannot be solved in the conventional technology.

According to the revised version of Article 841 of the User Electric Equipment Installation Rules, the circuits supplying power to the motor driving the fire pump should be monitored to prevent inadvertent isolation of the following specified connections: 3. Isolation equipment dedicated to the fire pump load: (a) The isolation equipment used for the regular power supply should be the user's main switch and can be locked in the closed position. It should be located within the range of the fire pump load equipment and away from other buildings or other fire pump power isolation equipment, and have a sufficient distance to prevent accidental simultaneous operation. (b) When the on-site backup generator is used as a backup power source, its wiring should comply with the emergency power circuit regulations of Article 976, paragraph 2, and the isolation equipment should be lockable in the closed position. In order to prevent the above-mentioned low-voltage circuit breaker from tripping and disconnecting the power due to the internal protection element when a fire occurs, there is an instantaneous excitation type automatic switching switch on the market as a switch between the mains and the backup generator. The advantage is that it will not trip and disconnect the power due to overload or short circuit conditions, causing the fire fighting equipment to have no power source. However, the instantaneous excitation type automatic switching switch basically has the arc extinguishing function. It is limited and cannot trip to isolate the accident when a short circuit occurs on the line, or when the equipment is overloaded and overcurrent occurs. The user's main switch or the switch of the backup generator can only protect the line and equipment if it has the protection function for the fault state in the power system loop. The instantaneous excitation automatic switching switch is a problem that cannot be solved in the existing technology.

In order to ensure the stability of power supply, units with strict requirements on power supply quality, such as military defense units, important government agencies, airports, wafer manufacturing plants, chemical plants, steel plants, public transportation and other agencies and business departments generally have backup power supply facilities and equipment, using more than two power sources, or multiple power sources of feeder loop power supply. When planning the power system, at least there are sufficient backup power sources such as generators, uninterruptible power systems, battery packs, solar energy, wind power generation, etc., while general commercial and general community residential buildings, due to space and financial factors, generally cannot require Taiwan Power Company to provide multiple feeder loop power supply, nor can they purchase Expensive power generation equipment. Generally speaking, the main source of electricity for residential and commercial buildings is the Taiwan Electric Power Company. Under certain conditions, backup generators are installed according to the requirements of fire regulations. Under normal conditions, low-voltage circuit breakers with tripping and power-off protection functions are used as the main isolation equipment between the mains and the backup power supply. In the power circuit, whether the fault current on the line or the overload current of the equipment exceeds the characteristic curve of the low-voltage circuit breaker, the low-voltage circuit breaker will perform tripping and power-off to isolate the accident. Therefore, under the functional requirements of fire or emergency conditions for non-interruption of electricity, general low-voltage circuit breakers cannot achieve the function of forced power supply.

In the existing technology, for equipment that cannot be interrupted in power supply, such as the melting furnace of a steel plant, the process of a chemical plant, the process of a wafer factory, the power supply of an operating room in a hospital, etc., in order to achieve uninterrupted power supply, the isolation device switches used include large gate switches, distribution boxes, safety switch boxes, and low-voltage molded low-voltage circuit breakers without tripping disconnecting components. The above products are installed in the power circuit and can only perform simple closing and The above products do not have sufficient arc extinguishing facilities in their product design, which will result in the failure of starting and closing under load. If they are operated under load, it will cause explosions or even fires. Although there are warning signs, misoperation or misoperation will cause serious accidents. Moreover, the isolation switch equipment does not have an overload trip protection function, which is a problem that cannot be solved by conventional technology.

In summary, low-voltage circuit breakers are generally used for isolation devices in most power equipment on the market. The low-voltage circuit breakers have overload protection functions for lines and equipment, and perform closing and opening functions. However, in special situations, if the circuit requires forced closing and power supply, ordinary low-voltage circuit breakers cannot achieve the forced closing function. If a switch without tripping and disconnecting function is used, although it will not trip and disconnect during power transmission, if it is closed or opened under load, sparks or even explosions will occur, causing industrial safety accidents. Moreover, under normal conditions, it is impossible to achieve the function of isolating equipment protection for lines and equipment. The above-mentioned deficiency cannot be solved in the known technology.

In summary, the low-voltage switch of the isolation equipment has a tripping element when it reaches the normal state, which can achieve the function of protecting the lines and equipment. When a fire occurs, it can force the power supply of the fire-fighting equipment to be forced to be used or the emergency equipment to be used. The improved device for preventing the accidental power outage of the fire alarm and emergency equipment of the present invention can have the functions of starting and closing and protecting by the low-voltage circuit breaker under normal conditions, but in an emergency, it provides a safe and reliable equipment with uninterrupted power supply, so that the electrical equipment can operate normally, prevent accidents, ensure the safety of personnel and prevent equipment and property damage, and improve the safety of electricity use.

To achieve the above-mentioned purpose, an improved device for preventing accidental power off of fire alarm and emergency equipment is provided. A low-voltage switch with a trip-free function actuated by an electric operator is connected to a main low-voltage circuit breaker. The electric operator actuates the low-voltage switch with a trip-free function to achieve the functions of opening and closing. When the main low-voltage circuit breaker is in the closed state, when the fire alarm equipment is actuated, the electric operator actuates the low-voltage switch with a trip-free function to achieve the functions of opening and closing. The electric operator actuates the low-voltage switch without tripping function to close, achieving the function of non-interruption of power supply. Similarly, when the emergency equipment information is actuated, the above actuation principle achieves the function of non-interruption of power supply. When the above abnormal state is released and the main low-voltage circuit breaker is in the closed state, the electric operator actuates the low-voltage switch without tripping function to start and stop, achieving the function of not starting under load.

To achieve the above purpose, the improved device for preventing accidental power failure of the fire alarm and emergency equipment can be provided with an automatic switching control unit, which actuates the electric operator according to the information of the fire alarm and emergency equipment power status control unit to achieve the function of automatic closing and starting.

To achieve the above-mentioned purpose, an improved device for preventing accidental power off of fire alarm and emergency equipment is connected to the power supply side and the load side of a main low-voltage circuit breaker. The improved device for preventing accidental power off of fire alarm and emergency equipment includes: a low-voltage switch without tripping function, an electric operator, a fire alarm and emergency equipment power status control The low-voltage switch without tripping function is a low-voltage circuit breaker without tripping function, and the low-voltage switch without tripping function is connected in parallel with the power supply side and the load side of the main low-voltage circuit breaker. The low-voltage circuit breaker without tripping function is provided with an operating handle to actuate the electric operator according to the automatic switching control unit. The operating handle achieves the function of actuating closing and starting; the electric operator is externally mounted at the position of the low-voltage switch without tripping function, and the electric operator is electrically connected to the automatic switching control unit to actuate the low-voltage switch without tripping function according to the information of the fire alarm and emergency equipment power state control unit; the fire alarm and emergency equipment power state control unit is provided with at least one of a fire alarm equipment detection signal receiving unit or an emergency equipment power state detection unit, and the fire alarm equipment detection signal receiving unit is electrically connected to an external fire alarm equipment, and when the external fire alarm equipment is actuated, the fire alarm equipment detection signal receiving unit receives the information , and is electrically connected to the automatic switching control unit, the emergency equipment power state detection unit is electrically connected to an emergency equipment forced action unit, when the emergency equipment forced action unit is actuated, the emergency equipment power state detection unit receives information and is electrically connected to the automatic switching control unit; the automatic switching control unit actuates the electric operator according to the command information of the fire alarm and emergency equipment power state control unit to enable the low-voltage switch without tripping function to start and close; wherein the improved device for preventing accidental power failure of fire alarm and emergency equipment is that when the main low-voltage circuit breaker is not in the closed position, the low-voltage switch without tripping function is switched on and off according to the signal of the automatic switching control unit. The information makes the electric operator unable to actuate and force the low-voltage switch without tripping function to close, preventing the low-voltage switch without tripping function from transmitting power alone under load. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is actuated, a message is sent to actuate the automatic switching control unit to actuate the electric operator to close the low-voltage switch without tripping function. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is not actuated, the fire alarm and emergency equipment power status control unit sends a message to actuate the automatic switching control unit to actuate the electric operator to open the low-voltage switch without tripping function.

To achieve the above-mentioned purpose, an improved device for preventing accidental power off of fire alarm and emergency equipment is connected in parallel to the power side and the load side of a main low-voltage circuit breaker. The improved device for preventing accidental power off of fire alarm and emergency equipment includes: a gate switch, an electric operator, a fire alarm and emergency equipment power state control unit, and an automatic switching control unit; the gate switch is connected in parallel with the power side and the load side of the main low-voltage circuit breaker, and the gate switch actuates the electric operator to activate the closing and starting functions according to the automatic switching control unit; the electric operator is externally mounted on the gate switch. The electric operator is electrically connected to the automatic switching control unit according to the information of the fire alarm and emergency equipment power state control unit to actuate the gate switch; the fire alarm and emergency equipment power state control unit is provided with at least one of a fire alarm equipment detection signal receiving unit or an emergency equipment power state detection unit, and the fire alarm equipment detection signal receiving unit is electrically connected to an external fire alarm equipment. When the external fire alarm equipment is actuated, the fire alarm equipment detection signal receiving unit receives the information and is electrically connected to the automatic switching control unit. The emergency equipment power state detection unit is electrically connected to an emergency equipment forced action unit. When the emergency equipment forced action unit is actuated, the emergency equipment power state detection unit receives information and is electrically connected to the automatic switching control unit; the automatic switching control unit actuates the electric operator according to the command information of the fire alarm and emergency equipment power state control unit to enable the gate switch to start and close; wherein the improved device for preventing accidental power failure of the fire alarm and emergency equipment is that when the main low-voltage circuit breaker is not in the closed position, the gate switch enables the power switch to start and close according to the information of the automatic switching control unit. If the electric operator is not actuated, the gate switch cannot be forced to close, preventing the gate switch from transmitting power alone under load. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power state control unit is actuated, a message is sent to activate the automatic switching control unit to activate the electric operator to close the gate switch. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power state control unit is not actuated, the fire alarm and emergency equipment power state control unit sends a message to activate the automatic switching control unit to activate the electric operator to open the gate switch.

1: Improved device to prevent accidental power outages in fire alarm and emergency equipment

2: Main low voltage circuit breaker

3: Power side

4: Load side

5: Low voltage switch without trip function

6: Electric operator

7: Fire alarm and emergency equipment power status control unit

8: Automatic switching control unit

9: Low voltage circuit breaker without trip function

10: Operating handle

11: Fire alarm equipment detection signal receiving unit

12: Emergency equipment power status detection unit

13: External fire alarm equipment

14: Emergency equipment mandatory action unit

15: Gate switch

[Figure 1] is a schematic diagram of the configuration of the first embodiment of the improved device for preventing accidental power failure of fire alarm and emergency equipment of the present invention.

[Figure 2] is a schematic diagram of the configuration of the second embodiment of the improved device for preventing accidental power failure of fire alarm and emergency equipment of the present invention.

The first embodiment of the improved device 1 for preventing accidental power off of fire alarm and emergency equipment of the present invention is shown in FIG1. The improved device 1 for preventing accidental power off of fire alarm and emergency equipment is connected in parallel to the power supply side 3 and the load side 4 of a main low-voltage circuit breaker 2. The improved device 1 for preventing accidental power off of fire alarm and emergency equipment includes: a low-voltage switch without trip function; 5, an electric operator 6, a fire alarm and emergency equipment power state control unit 7, and an automatic switching control unit 8; the low-voltage switch 5 without tripping function is a low-voltage circuit breaker 9 without tripping function, the low-voltage switch 5 without tripping function is connected in parallel with the power side 3 and the load side 4 of the main low-voltage circuit breaker 2, and the low-voltage circuit breaker 9 without tripping function is provided with an operator The operating handle 10 is actuated by the automatic switching control unit 8 to achieve the closing and starting functions of the electric operator 6; the electric operator 6 is externally arranged at the position of the low-voltage switch 5 without trip function, and the electric operator 6 is electrically connected to the automatic switching control unit 8 to actuate the low-voltage switch 5 without trip function according to the information of the fire alarm and emergency equipment power state control unit 7; the fire alarm and emergency equipment power state control unit 7 is provided with at least one of a fire alarm equipment detection signal receiving unit 11 or an emergency equipment power state detection unit 12, and the fire alarm equipment detection signal receiving unit 11 is electrically connected to an external fire alarm equipment 13. When the external fire alarm equipment 13 is actuated, the fire alarm equipment 13 is activated. The fire alarm equipment detection signal receiving unit 11 receives the information and is electrically connected to the automatic switching control unit 8. The emergency equipment power state detection unit 12 is electrically connected to an emergency equipment forced action unit 14. When the emergency equipment forced action unit 14 is actuated, the emergency equipment power state detection unit 12 receives the information and is electrically connected to the automatic switching control unit 8. The automatic switching control unit 8 actuates the electric operator 6 according to the command information of the fire alarm and emergency equipment power state control unit 7 to enable the low-voltage switch 5 without tripping function to start and close; wherein the improved device 1 for preventing accidental power failure of the fire alarm and emergency equipment is when the main low-voltage circuit breaker 2 is not in the closed position, the low-voltage switch 5 without tripping function According to the information of the automatic switching control unit 8, the electric operator 6 is not activated and cannot be forced to close the low-voltage switch 5 without tripping function, so as to prevent the low-voltage switch 5 without tripping function from transmitting power alone under load. When the main low-voltage circuit breaker 2 is in the closed position and the fire alarm and emergency equipment power state control unit 7 is activated, the information is sent to activate the automatic switching control unit 8 to make the power The electric operator 6 is actuated to close the low-voltage switch 5 without tripping function. When the main low-voltage circuit breaker 2 is in the closed position, the fire alarm and emergency equipment power status control unit 7 is not actuated. The fire alarm and emergency equipment power status control unit 7 sends information to activate the automatic switching control unit 8 to activate the electric operator 6 to open the low-voltage switch 5 without tripping function.

The second embodiment of the improved device 1 for preventing the accidental power off of fire alarm and emergency equipment of the present invention is shown in FIG. 2. The improved device 1 for preventing the accidental power off of fire alarm and emergency equipment is connected in parallel to the power supply side 3 and the load side 4 of a main low-voltage circuit breaker 2. The improved device 1 for preventing the accidental power off of fire alarm and emergency equipment comprises: a gate switch 15, an electric operator 6, a fire alarm and emergency equipment power state control unit 7, and an automatic switching control unit 8; the gate switch 15 is connected in parallel with the power supply side 3 and the load side 4 of the main low-voltage circuit breaker 2, and the gate switch 15 is operated by the electric operator 6 according to the automatic switching control unit 8. The electric operator 6 is externally mounted at the position of the gate switch 15, and the electric operator 6 is electrically connected to the automatic switching control unit 8 to actuate the gate switch 15 according to the information of the fire alarm and emergency equipment power state control unit 7; the fire alarm and emergency equipment power state control unit 7 is provided with at least one of a fire alarm equipment detection signal receiving unit 11 or an emergency equipment power state detection unit 12, and the fire alarm equipment detection signal receiving unit 11 is electrically connected to an external fire alarm equipment 13. When the external fire alarm equipment 13 is actuated, the fire alarm equipment detection signal receiving unit 11 receives the information. , and is electrically connected to the automatic switching control unit 8, the emergency equipment power state detection unit 12 is electrically connected to an emergency equipment forced action unit 14, and when the emergency equipment forced action unit 14 is actuated, the emergency equipment power state detection unit 12 receives information and is electrically connected to the automatic switching control unit 8; the automatic switching control unit 8 actuates the electric operator 6 according to the instruction information of the fire alarm and emergency equipment power state control unit 7 to enable the gate switch 15 to start and close; wherein the improved device 1 for preventing accidental power failure of fire alarm and emergency equipment is when the main low-voltage circuit breaker 2 is not in the closed position, the gate switch 15 is opened and closed according to the automatic switching control The control unit 8 sends information to the electric operator 6 so that it cannot force the gate switch 15 to close, preventing the gate switch 15 from transmitting power alone under load. When the main low-voltage circuit breaker 2 is in the closed position and the fire alarm and emergency equipment power state control unit 7 is actuated, the automatic switching control unit 8 is sent to actuate the electric operator 6 to close the gate switch 15. When the main low-voltage circuit breaker 2 is in the closed position, the fire alarm and emergency equipment power state control unit 7 is not actuated, and the fire alarm and emergency equipment power state control unit 7 sends information to actuate the automatic switching control unit 8 to actuate the electric operator 6 to open the gate switch 15.

In summary, the present invention is an improved device for preventing accidental power outages in fire alarm and emergency equipment, which further improves the stability and safety of the power supply system and has great industrial applicability. In addition, after checking the relevant products on the market and the approved patent announcements, there are no products with the same technical features as the present invention, which also meets the statutory patent application requirements of novelty and advancement. Based on the patent application filed in accordance with the law, I sincerely request the review committee to grant the patent for 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 better embodiment of the present invention, and it cannot be used to limit the scope of the rights of the present invention. All equivalent changes or modifications made according to the spirit of the present invention are still covered by the scope of the patent application of the present invention.

1: Improved device to prevent accidental power outages in fire alarm and emergency equipment

2: Main low voltage circuit breaker

3: Power side

4: Load side

5: Low voltage switch without trip function

6: Electric operator

7: Fire alarm and emergency equipment power status control unit

8: Automatic switching control unit

9: Low voltage circuit breaker without trip function

10: Operating handle

11: Fire alarm equipment detection signal receiving unit

12: Emergency equipment power status detection unit

13: External fire alarm equipment

14: Emergency equipment mandatory action unit

Claims (2)

An improved device for preventing accidental power failure of fire alarm, fire fighting and emergency equipment is connected to the power supply side and the load side of a main low-voltage circuit breaker. The improved device for preventing accidental power failure of fire alarm, fire fighting and emergency equipment comprises: a low-voltage switch without tripping function, an electric operator, a power state control unit of fire alarm, fire fighting and emergency equipment, and an automatic switching control unit; the low-voltage switch without tripping function is a low-voltage circuit breaker without tripping function, the low-voltage switch without tripping function is connected in parallel with the power supply side and the load side of the main low-voltage circuit breaker, and the low-voltage circuit breaker without tripping function is provided with an operating handle to actuate the electric operator according to the automatic switching control unit. The electric operator is externally mounted at the position of the low-voltage switch without tripping function, and the electric operator is electrically connected to the automatic switching control unit to actuate the low-voltage switch without tripping function according to the information of the fire alarm and emergency equipment power state control unit; the fire alarm and emergency equipment power state control unit is provided with at least one of a fire alarm equipment detection signal receiving unit or an emergency equipment power state detection unit, and the fire alarm equipment detection signal receiving unit is electrically connected to an external fire alarm equipment. When the external fire alarm equipment is actuated, the fire alarm equipment detection signal receiving unit receives the information and electrically The emergency equipment power state detection unit is electrically connected to an emergency equipment forced action unit. When the emergency equipment forced action unit is actuated, the emergency equipment power state detection unit receives information and is electrically connected to the automatic switching control unit. The automatic switching control unit actuates the electric operator according to the command information of the fire alarm and emergency equipment power state control unit to enable the low-voltage switch without tripping function to start and close. The improved device for preventing accidental power failure of fire alarm and emergency equipment is configured such that when the main low-voltage circuit breaker is not in the closed position, the low-voltage switch without tripping function is switched on and off according to the information of the automatic switching control unit. The electric operator cannot be actuated to force the low-voltage switch without tripping function to close, preventing the low-voltage switch without tripping function from transmitting power alone under load. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is actuated, a message is sent to actuate the automatic switching control unit to actuate the electric operator to close the low-voltage switch without tripping function. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is not actuated, the fire alarm and emergency equipment power status control unit sends a message to actuate the automatic switching control unit to actuate the electric operator to open the low-voltage switch without tripping function. An improved device for preventing accidental power off of fire alarm and emergency equipment is connected to the power supply side and the load side of a main low-voltage circuit breaker. The improved device for preventing accidental power off of fire alarm and emergency equipment comprises: a gate switch, an electric operator, a fire alarm and emergency equipment power state control unit, and an automatic switching control unit; the gate switch is connected in parallel with the power supply side and the load side of the main low-voltage circuit breaker, and the gate switch activates the electric operator to activate the closing and starting functions according to the automatic switching control unit; the electric operator is externally arranged at the position of the gate switch, The electric operator is electrically connected to the automatic switching control unit to actuate the gate switch according to the information of the fire alarm and emergency equipment power state control unit; the fire alarm and emergency equipment power state control unit is provided with at least one of a fire alarm equipment detection signal receiving unit or an emergency equipment power state detection unit. The fire alarm equipment detection signal receiving unit is electrically connected to an external fire alarm equipment. When the external fire alarm equipment is actuated, the fire alarm equipment detection signal receiving unit receives the information and is electrically connected to the automatic switching control unit. The emergency equipment power state detection unit is electrically connected to an emergency equipment forced action unit. When the emergency equipment forced action unit is actuated, the emergency equipment power state detection unit receives information and is electrically connected to the automatic switching control unit; the automatic switching control unit actuates the electric operator according to the command information of the fire alarm and emergency equipment power state control unit to enable the gate switch to start and close; wherein the improved device for preventing accidental power failure of the fire alarm and emergency equipment is that when the main low-voltage circuit breaker is not in the closed position, the gate switch enables the electric If the operator is not actuated, the gate switch cannot be forced to close, preventing the gate switch from transmitting power alone under load. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is actuated, a message is sent to activate the automatic switching control unit to activate the electric operator to close the gate switch. When the main low-voltage circuit breaker is in the closed position and the fire alarm and emergency equipment power status control unit is not actuated, the fire alarm and emergency equipment power status control unit sends a message to activate the automatic switching control unit to activate the electric operator to open the gate switch.

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