ESD (Electro-Static Discharge) switching modular control system and control method for oil and gas station

Abstract

The invention relates to the technical field of safety control of oil and gas stations, in particular to an ESD (Electro-Static Discharge) switching modular control system and control method for an oil and gas station. Through reasonable connection and configuration of the non-modular control box, the fire alarm host and the low-voltage power distribution cabinet, an oil and gas station ESD working condition emergency stop signal can be automatically detected and received in real time, and a non-fire power supply is rapidly and reliably cut off, so that the safety of personnel and equipment is ensured; a modular architecture is adopted, flexible configuration can be achieved according to different requirements, expansion and maintenance are convenient, higher safety redundancy and fault self-diagnosis capacity are achieved, and the working stability of the system under the emergency condition can be ensured; the method supports various communication protocols, can be seamlessly integrated with an SCADA system or other automatic systems, realizes safe, rapid and accurate switching control through a control algorithm, and is high in overall reliability, high in practicability, wide in application prospect and easy to popularize.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas station safety control, and in particular to an ESD non-modular control system and a control method for an oil and gas station. Background Art

[0002] The ESD system (Emergency Shutdown System) is the core of the safety protection of oil transfer stations. Its purpose is to quickly shut down key process equipment, isolate the source of danger, prevent the accident from expanding, and ensure the safety of the station when an emergency situation that may endanger personnel safety, equipment integrity or environmental safety is detected. According to the requirements of relevant standards, oil transfer stations should be able to cut off the power supply or power except for the fire protection system and emergency power supply under ESD emergency shutdown conditions or when a fire occurs. The ESD "non-cut-off" (cutting off non-fire emergency loads) function of the oil transfer station is an important part of the fire emergency system of the oil transfer station. This function is designed to quickly cut off the power supply that is not necessary for fire protection and emergency in emergency situations such as ESD shutdown and fire, while ensuring that the power supply of fire protection equipment is not affected, so as to facilitate the smooth progress of rescue operations.

[0003] Traditional oil and gas station disconnect control boxes typically expand the "disconnect non-fire emergency loads" signal from the central control room's station control system into multiple signals, which are then connected via cables to each circuit breaker circuit equipped with a shunt release, causing it to trip. However, because existing control boxes are generally assembled using intermediate relays, they suffer from drawbacks such as bulk, difficulty adding circuits, unclear status, slow response, and a high rate of misoperation, making them unable to meet the safety control requirements of modern oil and gas stations. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an ESD non-firefighting modular control system and control method for oil and gas stations, which can automatically detect and receive the ESD emergency stop signal of the oil and gas station in real time, quickly and reliably cut off the non-firefighting power supply, and realize safe, fast and accurate non-firefighting control.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] 1. An ESD non-modular control system for oil and gas stations

[0007] The present invention provides an ESD non-modular control system for oil and gas stations, which mainly includes: a non-modular control box 100 located in the main control room of the oil and gas station, and the non-modular control box 100 is electrically connected to a fire alarm host 200 located in the main control room and multiple low-voltage distribution cabinets 300 located in various work areas on site through corresponding signal control cables 7;

[0008] The fire alarm host 200 is used to monitor the detection signals of multiple smoke / flame detectors installed in various work areas on site in real time, and determine whether to send a smoke / fire alarm signal, and at the same time determine the alarm area;

[0009] The non-cutting modular control box 100 is used to receive the smoke / fire alarm signal and alarm area information, and generate corresponding non-cutting control instructions based on the non-cutting control algorithm;

[0010] The low-voltage distribution cabinet 300 is used to start the shunt release of the corresponding power supply circuit in the cabinet according to the non-fire protection control instruction to cut off the power supply of the corresponding non-fire protection load.

[0011] Preferably, the non-modular control box 100 includes a control box shell 6, a human-computer interaction module 1 is installed on the outer surface of the control box shell 6, and a power supply module 3 is installed inside, the power supply module 3 is connected to a backup battery 2, and the power supply module 3 is connected in series with multiple main control modules 5 through multiple connectors 4.

[0012] Preferably, the number of the main control modules 5 corresponds to the number of multiple low-voltage distribution cabinets 300 in each work area on site, and each main control module 5 is electrically connected to the low-voltage distribution cabinet 300 in the corresponding work area through a signal control cable 7 to monitor the load status information of each power supply circuit in the low-voltage distribution cabinet 300, and control the action of the shunt release on each power supply circuit based on the non-control algorithm.

[0013] Preferably, the load status information of the power supply circuit includes: the load type of the power supply circuit, the load power-off priority of the power supply circuit, and the output terminal current and voltage of the power supply circuit.

[0014] Preferably, the load types of the power supply circuit include: fire emergency loads and non-fire emergency loads; the non-fire emergency loads specifically include: general lighting equipment loads, air conditioning / ventilation equipment loads, and non-fire power equipment loads.

[0015] Preferably, the load power-off priority is adaptively adjusted based on the current change at the output end of the power supply circuit, specifically including: initially setting the general lighting equipment load to the first-level power-off priority, initially setting the air-conditioning / ventilation equipment load to the second-level power-off priority, and initially setting the non-fire power equipment load to the third-level power-off priority. The fire emergency load is not cut off by default.

[0016] When an alarm signal is received, if the output current change rate of the power supply circuit exceeds a preset threshold, the power-off priority of the load corresponding to the power supply circuit is automatically increased by one level.

[0017] Preferably, the fire alarm host 200 is provided with a manual alarm confirmation button corresponding to each work area on site; the sending of the smoke / fire alarm signal adopts dual signal confirmation verification: when the detection signal of the smoke / flame detector in the working area exceeds the preset range, and at the same time the manual alarm confirmation button in the working area is pressed, the fire alarm host 200 sends the corresponding smoke / fire alarm signal and alarm area information to the non-modular control box 100.

[0018] 2. A control method for ESD cutting non-modular control system

[0019] Based on the same inventive concept, the present invention also provides a control method for the ESD non-modular control system as described above, which mainly includes the following steps:

[0020] Step S1: The fire alarm host performs dual signal confirmation verification on the smoke / flame detectors and manual alarm confirmation buttons in each work area on site to determine whether each work area has issued a smoke / fire alarm signal and determine the serial number of the work area that issued the alarm signal;

[0021] Step S2, monitoring the load status information of each power supply circuit of the low-voltage distribution cabinet in the corresponding working area in real time by switching on multiple main control modules in the non-modular control box;

[0022] Step S3, each main control module generates a corresponding non-operation control instruction based on the non-operation control algorithm according to the alarm signal, the working area sequence number and the load status information;

[0023] Step S4: Each low-voltage power distribution cabinet starts the shunt release of the corresponding power supply circuit in the cabinet according to the non-firefighting control instruction, and cuts off the power supply of the corresponding non-firefighting load.

[0024] Preferably, the non-control algorithm includes:

[0025] 1) Cut off power in batches between work areas: Sort the work areas that send out alarm signals according to the work area serial number, and perform power-off control on each work area in ascending order of serial number to avoid instantaneous high current impacting the power grid caused by simultaneous power-off of all work areas;

[0026] 2) Gradual power cut-off in the same working area: After the low-voltage distribution cabinet receives the non-control cut-off instruction, it immediately cuts off the load power supply circuit with the first-level power cut-off priority in the cabinet and starts the timer; if the alarm signal still exists within the preset time t1, the load power supply circuit with the second-level power cut-off priority in the cabinet is cut off, otherwise the non-control cut-off instruction is canceled; if the alarm signal still exists within the preset time t2, the load power supply circuit with the third-level power cut-off priority in the cabinet is cut off, otherwise the non-control cut-off instruction is canceled to avoid erroneous cut-off caused by false alarms.

[0027] Preferably, before executing the non-load control algorithm, the main control module monitors in real time whether the output current of each power supply circuit in the low-voltage distribution cabinet exceeds a preset value. If not, it determines that the corresponding power supply circuit is a no-load circuit, and no longer issues a non-load control instruction to the power supply circuit, thereby avoiding cutting off the no-load circuit (to prevent misjudgment);

[0028] After issuing the non-fire control instruction, the main control module determines whether the corresponding non-fire load power supply is successfully cut off by monitoring the output voltage of each power supply circuit in the low-voltage distribution cabinet. If not, it triggers the sound and light alarm of the corresponding working area and sends the corresponding fault code to the fire alarm host to remind the operator that the non-fire load power supply has failed.

[0029] Compared with the prior art, the present invention has the following main advantages:

[0030] 1. The present invention can automatically detect and receive the ESD emergency stop signal of the oil and gas station in real time through the reasonable connection configuration of the non-modular control box, the fire alarm host and the low-voltage distribution cabinet, and quickly and reliably cut off the non-fire power supply to ensure the safety of personnel and equipment;

[0031] 2. The present invention adopts a modular architecture, which can be flexibly configured according to different needs, is easy to expand and maintain, and has higher safety redundancy and fault self-diagnosis capabilities, which can ensure the stability of the system in emergency situations;

[0032] 3. The present invention supports multiple communication protocols and can be seamlessly integrated with SCADA systems or other automation systems. It can achieve safe, fast and accurate non-control through control algorithms. It has high overall reliability, strong practicality, broad application prospects and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is an overall schematic diagram of an ESD non-modular control system according to an embodiment of the present invention;

[0034] Figure 2 Schematic diagram of a non-modular control box according to an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of the control method in an embodiment of the present invention.

[0036] In the figure: 100- non-modular control box; 200- fire alarm host; 300- low-voltage distribution cabinet; 1- human-machine interaction module; 2- backup battery; 3- power module; 4- connector; 5- main control module; 6- control box housing; 7- signal control cable. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0038] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0039] In the present invention, unless otherwise expressly specified or limited, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise expressly specified or limited.

[0040] Example 1: This embodiment provides an ESD non-modular control system for oil and gas stations, such as Figures 1-2 As shown, it mainly includes: a non-modular control box 100 located in the main control room of the oil and gas station, and the non-modular control box 100 is electrically connected to a fire alarm host 200 located in the main control room and multiple low-voltage distribution cabinets 300 located in various work areas on site through corresponding signal control cables 7;

[0041] The fire alarm host 200 is used to monitor the detection signals of multiple smoke / flame detectors installed in various work areas on site in real time, and determine whether to send a smoke / fire alarm signal, and at the same time determine the alarm area;

[0042] The non-cutting modular control box 100 is used to receive the smoke / fire alarm signal and alarm area information, and generate corresponding non-cutting control instructions based on the non-cutting control algorithm;

[0043] The low-voltage distribution cabinet 300 is used to start the shunt release of the corresponding power supply circuit in the cabinet according to the non-fire protection control instruction to cut off the power supply of the corresponding non-fire protection load.

[0044] Furthermore, the non-modular control box 100 includes a control box shell 6, a human-computer interaction module 1 is installed on the outer surface of the control box shell 6, and a power supply module 3 is installed inside, the power supply module 3 is connected to a backup battery 2, and the power supply module 3 is connected in series with multiple main control modules 5 through multiple connectors 4.

[0045] Furthermore, the number of the main control modules 5 corresponds to the number of multiple low-voltage distribution cabinets 300 in each work area on site. Each main control module 5 is electrically connected to the low-voltage distribution cabinet 300 in the corresponding work area through a signal control cable 7 to monitor the load status information of each power supply circuit in the low-voltage distribution cabinet 300, and control the action of the shunt release on each power supply circuit based on the non-control algorithm.

[0046] Furthermore, the load status information of the power supply circuit includes: the load type of the power supply circuit, the load power-off priority of the power supply circuit, and the output terminal current and voltage of the power supply circuit.

[0047] Furthermore, the load types of the power supply circuit include: fire emergency loads and non-fire emergency loads; the non-fire emergency loads specifically include: general lighting equipment loads, air conditioning / ventilation equipment loads, and non-fire power equipment loads.

[0048] Furthermore, the load power-off priority is adaptively adjusted based on the output current change of the power supply circuit, specifically including: initially setting the general lighting equipment load to the first-level power-off priority, initially setting the air-conditioning / ventilation equipment load to the second-level power-off priority, and initially setting the non-fire power equipment load to the third-level power-off priority. Fire emergency loads are not cut off by default.

[0049] When an alarm signal is received, if the output current change rate of the power supply circuit exceeds a preset threshold, the power-off priority of the load corresponding to the power supply circuit is automatically increased by one level.

[0050] Furthermore, the fire alarm host 200 is provided with a manual alarm confirmation button corresponding to each work area on site; the sending of the smoke / fire alarm signal adopts dual signal confirmation verification: when the detection signal of the smoke / flame detector in the working area exceeds the preset range, and at the same time the manual alarm confirmation button in the working area is pressed, the fire alarm host 200 sends the corresponding smoke / fire alarm signal and alarm area information to the non-modular control box 100.

[0051] Embodiment 2: This embodiment provides an ESD non-modular control system for oil and gas stations. The ESD non-modular control box is mainly composed of a power module, a main control module and a human-computer interaction module.

[0052] The power supply module provides a stable operating voltage for the entire system, and has an internal charging and discharging module, which can expand the backup battery to prevent the failure to complete the non-operation after the mains power is cut off.

[0053] The main control module can collect the ESD signal of the station control system in real time, and then output the non-fire protection signal to the non-fire protection circuit breaker of the distribution cabinet through signal conversion and expansion of the integrated modular circuit.

[0054] The human-computer interaction module displays the working status and fault information of the control box on the operation interface, making it convenient for users to understand and control the operation of the entire system. At the same time, it has multiple communication ports such as RS485 to facilitate signal uploading.

[0055] Furthermore, the fire alarm host 6 sends a 24V signal to the control box when a fire occurs.

[0056] Furthermore, the main control module 5 transmits a passive signal to the low-voltage power distribution cabinet to control its circuit tripping.

[0057] Example 3: Based on the same inventive concept, this embodiment also provides a control method for the ESD non-modular control system as described above. Figure 3 As shown, it mainly includes the following steps:

[0058] Step S1: The fire alarm host performs dual signal confirmation verification on the smoke / flame detectors and manual alarm confirmation buttons in each work area on site to determine whether each work area has issued a smoke / fire alarm signal and determine the serial number of the work area that issued the alarm signal;

[0059] Step S2, monitoring the load status information of each power supply circuit of the low-voltage distribution cabinet in the corresponding working area in real time by switching on multiple main control modules in the non-modular control box;

[0060] Step S3, each main control module generates a corresponding non-operation control instruction based on the non-operation control algorithm according to the alarm signal, the working area sequence number and the load status information;

[0061] Step S4: Each low-voltage power distribution cabinet starts the shunt release of the corresponding power supply circuit in the cabinet according to the non-firefighting control instruction, and cuts off the power supply of the corresponding non-firefighting load.

[0062] Furthermore, the non-control algorithm includes:

[0063] 1) Cut off power in batches between work areas: Sort the work areas that send out alarm signals according to the work area serial number, and perform power-off control on each work area in ascending order of serial number to avoid instantaneous high current impacting the power grid caused by simultaneous power-off of all work areas;

[0064] 2) Gradual power cut-off in the same working area: After the low-voltage distribution cabinet receives the non-control cut-off instruction, it immediately cuts off the load power supply circuit with the first-level power cut-off priority in the cabinet and starts the timer; if the alarm signal still exists within the preset time t1, the load power supply circuit with the second-level power cut-off priority in the cabinet is cut off, otherwise the non-control cut-off instruction is canceled; if the alarm signal still exists within the preset time t2, the load power supply circuit with the third-level power cut-off priority in the cabinet is cut off, otherwise the non-control cut-off instruction is canceled to avoid erroneous cut-off caused by false alarms.

[0065] Furthermore, before executing the non-load control algorithm, the main control module monitors in real time whether the output current of each power supply circuit in the low-voltage distribution cabinet exceeds a preset value. If not, it determines that the corresponding power supply circuit is a no-load circuit, and no longer issues a non-load control instruction to the power supply circuit, thereby avoiding cutting off the no-load circuit (to prevent misjudgment);

[0066] After issuing the non-fire control instruction, the main control module determines whether the corresponding non-fire load power supply is successfully cut off by monitoring the output voltage of each power supply circuit in the low-voltage distribution cabinet. If not, it triggers the sound and light alarm of the corresponding working area and sends the corresponding fault code to the fire alarm host to remind the operator that the non-fire load power supply has failed.

[0067] Furthermore, all parts of this application that are not described in detail are the same as the existing technology or are implemented using the existing technology.

[0068] In summary:

[0069] 1. The present invention can automatically detect and receive the ESD emergency stop signal of the oil and gas station in real time through the reasonable connection configuration of the non-modular control box, the fire alarm host and the low-voltage distribution cabinet, and quickly and reliably cut off the non-fire power supply to ensure the safety of personnel and equipment;

[0070] 2. The present invention adopts a modular architecture, which can be flexibly configured according to different needs, is easy to expand and maintain, and has higher safety redundancy and fault self-diagnosis capabilities, which can ensure the stability of the system in emergency situations;

[0071] 3. The present invention supports multiple communication protocols and can be seamlessly integrated with SCADA systems or other automation systems. It can achieve safe, fast and accurate non-control through control algorithms. It has high overall reliability, strong practicality, broad application prospects and is easy to promote.

[0072] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0073] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0074] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ESD non-modular control system for oil and gas stations, characterized by: The invention comprises a non-modular control box (100) arranged in the main control room of the oil and gas station, wherein the non-modular control box (100) is electrically connected to a fire alarm host (200) arranged in the main control room and a plurality of low-voltage distribution cabinets (300) arranged in various working areas on site through corresponding signal control cables (7); The fire alarm host (200) is used to monitor the detection signals of multiple smoke / flame detectors installed in various work areas on site in real time, and to determine whether to send a smoke / fire alarm signal, and to determine the alarm area; The non-destructive modular control box (100) is used to receive the smoke / fire alarm signal and alarm area information, and generate corresponding non-destructive control instructions based on a non-destructive control algorithm; The low-voltage power distribution cabinet (300) is used to start the shunt release of the corresponding power supply circuit in the cabinet according to the non-firefighting control instruction to cut off the power supply of the corresponding non-firefighting load.

2. The ESD non-modular control system for oil and gas stations according to claim 1 is characterized by: The non-modular control box (100) comprises a control box housing (6), a human-machine interaction module (1) is mounted on the outer surface of the control box housing (6), and a power supply module (3) is mounted inside the housing, the power supply module (3) is connected to a backup battery (2), and the power supply module (3) is serially connected to a plurality of main control modules (5) via a plurality of connectors (4).

3. The ESD non-modular control system for oil and gas stations according to claim 2 is characterized by: The number of the main control modules (5) corresponds to the number of the plurality of low-voltage distribution cabinets (300) in each work area on site. Each main control module (5) is electrically connected to the low-voltage distribution cabinet (300) in the corresponding work area via a signal control cable (7) to monitor the load status information of each power supply circuit in the low-voltage distribution cabinet (300) and control the action of the shunt release on each power supply circuit based on the non-operating control algorithm.

4. The ESD non-modular control system for oil and gas stations according to claim 3 is characterized in that: The load status information of the power supply circuit includes: the load type of the power supply circuit, the load power-off priority of the power supply circuit, and the output terminal current and voltage of the power supply circuit.

5. The ESD non-modular control system for oil and gas stations according to claim 4 is characterized in that: The load types of the power supply circuit include: fire emergency loads and non-fire emergency loads; The non-fire emergency loads specifically include: general lighting equipment loads, air conditioning / ventilation equipment loads, and non-fire power equipment loads.

6. The ESD non-modular control system for oil and gas stations according to claim 5, characterized in that: The load shedding priority is adaptively adjusted based on the output current change of the power supply circuit, specifically including: Initially setting the general lighting equipment load to the first-level power-off priority, the air-conditioning / ventilation equipment load to the second-level power-off priority, and the non-fire-fighting power equipment load to the third-level power-off priority; When an alarm signal is received, if the output current change rate of the power supply circuit exceeds a preset threshold, the power-off priority of the load corresponding to the power supply circuit is automatically raised by one level.

7. The ESD non-modular control system for oil and gas stations according to claim 1, characterized in that: The fire alarm host (200) is provided with manual alarm confirmation buttons corresponding to each work area on site; The transmission of the smoke / fire alarm signal adopts dual signal confirmation verification: when the detection signal of the smoke / flame detector in the working area exceeds the preset range, and at the same time the manual alarm confirmation button in the working area is pressed, the fire alarm host (200) sends the corresponding smoke / fire alarm signal and alarm area information to the non-modular control box (100).

8. A control method for an ESD cutting non-modular control system according to any one of claims 1 to 7, characterized in that: The steps include: Step S1: The fire alarm host performs dual signal verification on the smoke / flame detectors and manual alarm confirmation buttons in each work area on site to determine whether each work area has issued a smoke / fire alarm signal and determine the serial number of the work area that issued the alarm signal; Step S2, monitoring the load status information of each power supply circuit of the low-voltage distribution cabinet in the corresponding working area in real time by switching on multiple main control modules in the non-modular control box; Step S3, each main control module generates a corresponding non-operation control instruction based on the non-operation control algorithm according to the alarm signal, the working area sequence number and the load status information; In step S4, each low-voltage distribution cabinet starts the shunt release of the corresponding power supply circuit in the cabinet according to the non-fire protection control instruction, and cuts off the power supply of the corresponding non-fire protection load.

9. The control method according to claim 8, characterized in that: The non-cutting control algorithm includes: 1) Cut off power in batches between work areas: Sort the work areas that send out alarm signals according to the work area serial number, and perform power off control on each work area in order from small to large serial numbers; 2) Gradual power cutoff in the same working area: After receiving the non-control cutoff instruction, the low-voltage distribution cabinet immediately cuts off the load power supply circuit with the first-level power cutoff priority in the cabinet and starts the timer; if the alarm signal still exists within the preset time t1, the load power supply circuit with the second-level power cutoff priority in the cabinet is cut off, otherwise the non-control cutoff instruction is canceled; if the alarm signal still exists within the preset time t2, the load power supply circuit with the third-level power cutoff priority in the cabinet is cut off, otherwise the non-control cutoff instruction is canceled.

10. The control method according to claim 8, characterized in that: Before executing the non-load control algorithm, the main control module monitors in real time whether the output current of each power supply circuit in the low-voltage distribution cabinet exceeds a preset value. If not, it determines that the corresponding power supply circuit is a no-load circuit and no longer issues a non-load control instruction to the power supply circuit; After issuing the non-fire control instruction, the main control module monitors the output voltage of each power supply circuit in the low-voltage distribution cabinet to determine whether the corresponding non-fire load power supply is successfully cut off. If not, it triggers the sound and light alarm of the corresponding work area and sends the corresponding fault code to the fire alarm host.

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