Four-in-one anti-mislocking system

Abstract

A four-in-one anti-error locking system, the system consists of four subsystems, the four subsystems are identity restriction subsystem, primary equipment locking subsystem, unit line locking subsystem and other factor locking subsystem; the four locking subsystems are connected to a locking information display device, a monitoring system sends out a command signal and transmits it to the four subsystems in the anti-error locking system, after receiving the command signal, the four subsystems respectively verify the feasibility of the command, when the command signal does not conform to the operating procedure, the locking function is immediately activated in the four subsystems, once any one of the four subsystems is activated, the entire anti-error locking system also activates the locking function; the present invention adopts a brand-new anti-error operation locking system, supplements and improves the anti-error locking system on the basis of the original "five protection" system, makes the anti-error locking system more rigorous, and realizes the "four-in-one" anti-error locking function for operator identity, primary equipment, unit line and other factors.

Description

Technical Field

[0001] The invention belongs to the technical field of intelligent monitoring systems, and in particular relates to a four-in-one anti-mislocking system. Background Art

[0002] During the operation of a hydropower station, the safe operation of the power station is the top priority for the stable operation of the entire system. Preventing electrical misoperation is a key link in accident control. Electrical misoperation accidents are extremely harmful, and once they occur, the consequences will be very serious; they will cause equipment damage and even casualties. In order to ensure the safe and reliable operation of the equipment and avoid the occurrence of electrical misoperation, hydropower plants must install anti-misoperation devices to prevent 1. Mistaken opening and closing of circuit breakers; 2. Opening and closing of disconnectors under load; 3. Hanging ground wires under power; 4. Closing circuit breakers with ground wires; 5. Accidentally entering live intervals. "Five prevention" requirements.

[0003] The locking conditions of the primary equipment of the hydropower plant at the scene are the same as those of the monitoring system. The difference is that when operating the primary equipment in the monitoring system, the locking relationship of the software in the monitoring system is effective, and when operating on site, the locking relationship of the control box of the field equipment is effective; the existing operating system's anti-error operation usually only meets the "five protection" requirements, and is still not rigorous enough for the operation of electrical primary equipment, and electrical accidents caused by the monitoring system also occur from time to time. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the present invention provides a four-in-one anti-error locking system, which adopts a brand-new anti-error operation locking system. It supplements and improves the anti-error locking system on the basis of the original "five-protection" system, making the anti-error locking system more rigorous, and realizing the "four-in-one" anti-error locking function for the operator identity, primary equipment, unit circuit and other factors.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve:

[0006] A four-in-one anti-error locking system, the system consists of four locking subsystems and an emergency unlocking subsystem, the four locking subsystems are an identity restriction subsystem, a primary equipment locking subsystem, a unit line locking subsystem, and other factors locking subsystem, the four locking subsystems are integrated into the anti-error locking system and form a "four-in-one" function; after the monitoring system sends out a command signal, the command signal will be transmitted to the four subsystems in the anti-error locking system respectively, and the four subsystems will verify the legality of the command after receiving the command signal. When the command signal does not comply with the operating procedure, the four subsystems immediately start the locking function. Once any one of the four subsystems starts the lock, the entire anti-error locking system will also start the locking function, and the four subsystems are connected to the locking information display device through a signal line; in addition, the command signal can be urgently unlocked through the emergency unlocking subsystem, and the command signal verified by the emergency unlocking subsystem can skip the verification of the locking subsystem and immediately implement the operating command.

[0007] In a preferred solution, the identity restriction subsystem includes an operation authority confirmation module and an operation range confirmation module. The operation instruction must meet the operation requirements of these two modules at the same time, and the identity restriction subsystem will be unlocked.

[0008] In the preferred solution, the primary equipment locking subsystem includes a circuit breaker anti-error locking module, an isolating switch anti-error locking module and an earthing switch anti-error locking module; the operation instructions must meet the operation requirements of these three modules at the same time, and the primary equipment locking subsystem will be unlocked.

[0009] In the preferred solution, the unit line locking subsystem includes a fault elimination state locking module, a maintenance state locking module, a startup state locking module and a shutdown state locking module; the operation instruction needs to release the locking instructions of these four modules at the same time, and the unit line locking subsystem will be released.

[0010] In the preferred solution, the other factors locking subsystem includes a long idle state locking module and a temporary power failure locking module; the operation instruction needs to release the locking instructions of these two modules at the same time, and the other factors locking subsystem will release the lock.

[0011] In the preferred solution, the emergency unlocking subsystem needs to be verified twice after the password is confirmed before verification can be completed. After the verification is completed, the command signal can skip the verification of the identity restriction subsystem, the primary equipment locking subsystem, the unit line locking subsystem and other locking subsystems and directly execute the command signal.

[0012] In a preferred solution, the locking information display device includes a body shell, a display screen, an alarm light and a reset button; four display screens are provided on the body shell, an alarm light is provided above the display screen, and a reset button is provided below the display screen.

[0013] The four-in-one anti-mistake locking system includes the following steps when the system is running:

[0014] Step 1: The monitoring system receives the command signal and transmits it to the four-in-one anti-mistake locking system for verification;

[0015] Step 2: After receiving the command signal, the identity restriction subsystem verifies the legitimacy of its operation. After the verification is passed, the lock is released and the command model is passed to the primary device lock subsystem for further verification;

[0016] Step 3: After receiving the command signal, the primary equipment locking subsystem verifies the legality of its operation. After the verification is passed, the locking is released and the command model is transmitted to the unit line locking subsystem for further verification;

[0017] Step 4: After receiving the command signal, the unit line locking subsystem verifies the legality of its operation. After the verification, the locking is released and the command model is passed to other factor locking subsystems for further verification;

[0018] Step 5: After receiving the command signal, the locking subsystem of other factors verifies the legality of its operation. After the verification is passed, all locking systems are released;

[0019] Step 6: The command signal is verified by the locking system, and the monitoring system immediately executes the operation command;

[0020] Step 7: In an emergency, the monitoring system receives the command signal and directly transmits the command signal to the emergency unlocking subsystem. After the emergency unlocking subsystem password is confirmed, the monitoring system immediately executes the operation command.

[0021] In the steps from Step 2 to Step 4, when the command signal passes through any step and fails to pass its verification, the corresponding locking subsystem in the step cannot be unlocked, and the command signal cannot be passed to the next step for continued execution.

[0022] In Step 2 to Step 4, the locking information display device will display the locking information of each step in real time. When the command signal fails to pass the verification of the locking subsystem, the locking information display device will sound an alarm and the monitoring personnel need to manually reset it on site.

[0023] This patent can achieve the following beneficial effects:

[0024] 1. This system adds identity restriction subsystem, unit line locking subsystem and other factors locking subsystem to the original "five-defense" locking system, and integrates these four locking subsystems into a "four-in-one" system, making the locking function of the system more diversified and greatly improving the safety and reliability of the original locking system;

[0025] 2. This system has added an emergency unlocking subsystem. When encountering an emergency and unable to wait for the locking system to confirm, the emergency unlocking subsystem can be used to perform emergency operations on the primary equipment, thus improving the emergency handling capability of the entire system;

[0026] 3. The system is equipped with a locking information display device that can quickly display all locking information. When the operation instruction cannot be verified by the locking device, the locking information display device can immediately display the specific cause of the lock and issue a warning prompt in time, thereby facilitating the staff to quickly handle the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0028] Figure 1 It is a schematic diagram of the working principle of the entire locking device of the present invention;

[0029] Figure 2 This is a schematic diagram of the working principle of the identity restriction subsystem of the present invention;

[0030] Figure 3 This is a schematic diagram of the working principle of the primary equipment locking subsystem of the present invention;

[0031] Figure 4 It is a schematic diagram of the unit line locking subsystem and working principle of the present invention;

[0032] Figure 5 This is a schematic diagram of the working principle of the locking subsystem of other factors of the present invention;

[0033] Figure 6 It is a schematic diagram of the structure and function of the locking information display device of the present invention.

[0034] In the figure: identity restriction subsystem 1, operation authority confirmation module 1-1, operation range confirmation module 1-2, primary equipment locking subsystem 2, circuit breaker anti-error locking module 2-1, disconnector anti-error locking module 2-2, grounding switch anti-error locking module 2-3, unit line locking subsystem 3, fault elimination state locking module 3-1, maintenance state locking module 3-2, start-up state locking module 3-3, shutdown state locking module 3-4, other factors locking subsystem 4, long idle state locking module 4-1, temporary power failure locking module 4-2, monitoring system 5, command signal 6, emergency unlocking subsystem 7, locking information display device 8, body casing 8-1, display screen 8-2, alarm light 8-3, reset button 8-4. DETAILED DESCRIPTION

[0035] like Figure 1As shown, a four-in-one anti-error locking system consists of four locking subsystems and an emergency unlocking subsystem 7. The four locking subsystems are identity restriction subsystem 1, primary equipment locking subsystem 2, unit line locking subsystem 3 and other factor locking subsystem 4. The four locking subsystems are integrated into the anti-error locking system and form a "four-in-one" function; after the monitoring system 5 sends a command signal 6 to the four-in-one anti-error locking system, the command signal 6 will be transmitted to the four subsystems in the anti-error locking system respectively. After receiving the command signal 6, the four subsystems respectively verify the feasibility of the command. When the command signal 6 does not comply with the operating procedures of any one of the four subsystems, the four subsystems immediately start the locking function. Once any one of the four subsystems starts the locking function, the entire anti-error locking system also starts the locking function, and the monitoring system 5 cannot continue to execute the operating instructions.

[0036] The preferred solution is Figure 2 As shown, the identity restriction subsystem 1 includes an operation authority confirmation module 1-1 and an operation scope confirmation module 1-2, wherein the operation authority confirmation module 1-1 and the scope confirmation module 1-2 can adopt third-party professional software such as open source middleware Ralasafe, open source framework Spring Security, commercial products Oracle EntitlementsServer, IBM Tivoli Access Manager, UPMS universal user authority system, etc.; the function of the scope confirmation module 1-2 is to determine the identity information of the duty officer, the main duty officer, the duty officer and the staff of various identities, the system performs identity authentication, and grants corresponding operation authority, thereby avoiding misoperation caused by the identity of the staff; the operation authority confirmation module 1-1 requires the operator to log in to the system with his own account or fingerprint recognition. Only when the operator's identity authentication is successful, can subsequent operations be performed, avoiding misoperation by outsiders or other work; the operation instruction must meet the operation requirements of these two modules at the same time, and the identity restriction subsystem 1 will be unlocked. After the operator logs in to their respective accounts, all the operation contents of the logon will be recorded, including the operator, operation time and operation content, to provide a basis for subsequent troubleshooting.

[0037] The preferred solution is Figure 3As shown, the primary equipment locking subsystem 2 includes a circuit breaker anti-error locking module 2-1, an isolating switch anti-error locking module 2-2 and an earthing switch anti-error locking module 2-3; among them, existing products such as Zhenjiang Tuoxin Power ZJ2004 series, Zhuhai Youte UT-2000Ⅳ and Zhejiang Shenle Technology Co., Ltd.'s SYKJ microcomputer five-protection system all have such functions, and users can choose a suitable brand based on actual needs and installation costs; among them, the function of the circuit breaker anti-error locking module 2-1 is that the locking module will be unlocked only when the matching isolating switch and earthing switch are in the correct position, otherwise the isolating switch will not be able to operate;

[0038] The function of the disconnector anti-mistake locking module 2-2 is that the locking module will release the locking only when the matching circuit breaker and grounding switch are in the correct position, otherwise the disconnector will not be able to operate;

[0039] The function of the grounding knife switch anti-mistake locking module 2-3 is that the locking module will be unlocked only when the matching circuit breaker and disconnector are in the correct position, otherwise the grounding knife switch will not be able to operate;

[0040] The operation instructions must meet the operation requirements of the three locking modules at the same time, and the primary equipment locking subsystem 2 will release the lock.

[0041] The preferred solution is Figure 4 As shown, the unit line locking subsystem 3 includes a fault elimination state locking module 3-1, a maintenance state locking module 3-2, a startup state locking module 3-3 and a shutdown state locking module 3-4; the operation instruction needs to release the locking instructions of these four modules at the same time, and the unit line locking subsystem 3 will release the locking; usually when the signal device collects the analog signal (voltage, current) in the line, the analog signal can be further used by the data processor CPU after AD conversion, and the data processing can adopt the AD+FPGA+CPU architecture, and the FPGA completes the data collection in the line. The AD uses a relatively high-bit 16-bit AD8696, and the CPU can use the 32-bit Intel IXP420, with a maximum operating frequency of 533MHz;

[0042] The function of the fault elimination state locking module 3-1 is to deal with the generator or line equipment in a timely manner when there are defects. During the defect elimination process, the monitoring system 5 cannot perform any related operations, otherwise it may cause misoperation and cause injuries to the staff. At this time, when the equipment defect elimination work starts, the "fault elimination state" is set on the generator or line. When the generator or line is in the "fault elimination state", the fault elimination state locking module 3-1 is in a locked state, thereby achieving the effect of preventing misoperation. When the generator or line is in the "fault elimination state", the equipment will be continuously monitored, and all action conditions or operating parameters will be recorded;

[0043] The function of the maintenance state locking module 3-2 is to prevent the monitoring system 5 from performing any related operations during the maintenance of the generator or line equipment, otherwise it may cause misoperation and cause injuries to the staff. At this time, when the equipment maintenance work starts, the "maintenance state" is set on the generator or line. When the generator or line is in the "maintenance state", the maintenance state locking module 3-2 is in a locked state, thereby achieving the effect of preventing misoperation, and all operating states, operating parameters, displacement conditions, etc. of the generator or line will be blocked, and any action conditions or parameters will not be recorded and will not be transmitted to the power grid system;

[0044] The function of the startup state locking module 3-3 is to prevent the monitoring system 5 from performing any related operations during the startup process of the generator, otherwise it may cause an accidental touch or click of a related function button, which ultimately leads to a failed startup. When the generator is in the startup state, the startup state locking module 3-3 is in a locked state, and even if the related function button of the monitoring system 5 is clicked, it is an invalid operation;

[0045] The function of the shutdown state locking module 3-4 is to prevent the monitoring system 5 from performing any related operations during the shutdown process of the generator, otherwise it may cause accidental touching or clicking of related function buttons, ultimately leading to unsuccessful shutdown. When the generator is in the shutdown state, the shutdown state locking module 3-4 is in a locked state, and even clicking the related function buttons of the monitoring system 5 is an invalid operation.

[0046] The preferred solution is Figure 5 As shown, the other factors blocking subsystem 4 includes a long idle state blocking module 4-1 and a temporary power failure blocking module 4-2; the operation instruction needs to release the blocking instructions of these two modules at the same time, and the other factors blocking subsystem 4 will release the blocking; the existing microcomputer protection systems such as Nanzhi ps1640, Nanrui rcs9611, Sifang csc211, Xuji wxh820, etc. have such functions. When the system is installed, the microcomputer protection system function of the hydropower station can be integrated into the protection system;

[0047] The function of the long idle state locking module 4-1 is that when the monitoring system is not operated for a long time (the time can be set according to the actual situation), the long idle state locking module 4-1 is locked and no operation can be performed to avoid erroneous operation caused by accidental touch;

[0048] The function of the temporary power outage locking module 4-2 is that when the monitoring system 5 is temporarily powered off, the temporary power outage locking module 4-2 is locked to prevent erroneous operation after the power is restored.

[0049] The preferred solution is Figure 1As shown, the four-in-one anti-mislocking system is also provided with an emergency unlocking subsystem 7. When an emergency occurs in the power plant and the primary equipment of the power plant needs to be operated immediately, in order to save verification time during operation, the emergency unlocking subsystem 7 can skip the four locking subsystems and directly operate the monitoring system 5. Before the emergency unlocking subsystem 7 is executed, the password needs to be repeatedly confirmed, and this subsystem shall not be used in non-emergency situations.

[0050] The preferred solution is Figure 6 As shown, the locking information display device 8 includes a body shell 8-1, a display screen 8-2, an alarm light 8-3 and a reset button 8-4; four display screens 8-2 are arranged on the body shell 8-1, an alarm light 8-3 is arranged above the display screen 8-2, and a reset button 8-4 is arranged below the display screen 8-2; wherein the display screens 8-2 correspond to four sets of locking subsystems respectively, when the command signal 6 passes through the four sets of locking subsystems and the verification fails, the display screen 8-2 immediately displays the module that cannot pass the verification, and the corresponding alarm light 8-3 on the display screen 8-2 emits a red flashing alarm light, the staff can accurately find the reason why the verification cannot be passed according to the displayed module information, and the reset button 8-4 can be pressed only after the fault is eliminated, and the alarm light 8-3 stops flashing after the reset button 8-4 is pressed.

[0051] Implementation examples Figure 1 As shown:

[0052] Step 1: The monitoring system 5 receives the command signal 6 and transmits the command signal 6 to the four-in-one anti-mistake locking system for verification;

[0053] Step 2: After receiving the command signal 6, the identity restriction subsystem 1 verifies the legality of its operation. The verification content includes the operation authority authentication and the operation scope authentication. After the verification is passed, the identity restriction subsystem 1 is unlocked and the command model is transmitted to the primary equipment locking subsystem 2 for further verification;

[0054] Step 3: After receiving the command signal 6, the primary equipment locking subsystem 2 verifies the legality of its operation. The verification content includes the circuit breaker anti-misoperation certification, the disconnector anti-misoperation certification and the grounding switch anti-misoperation certification. After the verification is passed, the primary equipment locking subsystem 2 is unlocked and the command model is transmitted to the unit line locking subsystem 3 for further verification;

[0055] Step 4: After receiving the command signal 6, the unit line blocking subsystem 3 verifies the legality of its operation. The verification content includes the fault elimination state anti-misoperation authentication, the maintenance state anti-misoperation authentication, the startup state anti-misoperation authentication and the shutdown state anti-misoperation authentication. After the verification is passed, the unit line blocking subsystem 3 is unlocked and the command model is passed to other factor blocking subsystems 4 for further verification;

[0056] Step 5: After receiving the command signal 6, the locking subsystem 4 of other factors verifies the legality of its operation. The verification content includes the long idle state anti-misoperation authentication and the shutdown state anti-misoperation authentication. After the verification is passed, all the locking modules in the four-in-one anti-misoperation locking system are released;

[0057] Step 6: The command signal 6 is verified by the locking system, and the monitoring system 5 immediately executes the operation command;

[0058] Step 7: In an emergency, the monitoring system 5 receives the command signal 6 and directly transmits the command signal 6 to the emergency unlocking subsystem 7. The emergency unlocking subsystem 7 only needs to be confirmed twice by the password. When the password is confirmed, the emergency unlocking subsystem 7 passes the verification, and the monitoring system 5 immediately executes the operation instruction.

[0059] In the above case, when the instruction signal 6 passes through any step from step 2 to step 5 and fails to pass its verification, the corresponding locking subsystem in the step cannot be unlocked, and the instruction signal 6 cannot be passed to the next step for continued execution.

[0060] In the above case, the locking information display device 8 of step 2 to step 5 will display the locking information of each step in real time through the display screen 8-2. When the command signal 6 fails to pass the verification of the locking subsystem, the locking information display device 8 will sound an alarm through the alarm light 8-3. After the fault is eliminated, the staff will press the reset button 8-4 on site to manually reset it.

[0061] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The various technical features described in the present invention can be combined with each other without conflict. The protection scope of the present invention shall be the technical solutions described in the claims, including the equivalent replacement solutions of the technical features in the technical solutions described in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A four-in-one anti-mistake locking system, the system consists of four locking subsystems and one emergency unlocking subsystem (7), characterized in that: The four interlocking subsystems are the identity restriction subsystem (1), the primary equipment interlocking subsystem (2), the unit line interlocking subsystem (3) and the other factor interlocking subsystem (4); the other factor interlocking subsystem (4) includes a long idle state interlocking module (4-1) and a temporary power failure interlocking module (4-2); the operation instruction needs to release the interlocking instructions of these two modules at the same time, and then the other factor interlocking subsystem (4) will release the interlocking; After the monitoring system (5) sends out a command signal (6), the command signal (6) will be transmitted to the four subsystems in the anti-error locking system respectively. After receiving the command signal (6), the four subsystems will verify the legitimacy of the command respectively. When the command signal (6) does not comply with the operating procedures, the four subsystems will immediately start the locking function. Once any of the four subsystems starts the locking, the entire anti-error locking system will also start the locking function. The four subsystems are connected to the locking information display device (8) through a signal line. In addition, the command signal (6) can also be urgently unlocked through the emergency unlocking subsystem (7). After being verified by the emergency unlocking subsystem (7), the command signal (6) can skip the verification of the four locking subsystems and immediately implement the operation command.

2. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The identity restriction subsystem (1) comprises an operation authority confirmation module (1-1) and an operation range confirmation module (1-2). The operation instruction must simultaneously meet the operation requirements of these two modules before the identity restriction subsystem (1) will be unlocked.

3. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The primary equipment locking subsystem (2) comprises a circuit breaker anti-error locking module (2-1), an isolating switch anti-error locking module (2-2) and an earthing switch anti-error locking module (2-3); the operation instructions must simultaneously meet the operation requirements of the three modules before the primary equipment locking subsystem (2) is unlocked.

4. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The unit line interlocking subsystem (3) comprises a fault elimination state interlocking module (3-1), a maintenance state interlocking module (3-2), a startup state interlocking module (3-3) and a shutdown state interlocking module (3-4); an operation instruction needs to release the interlocking instructions of these four modules at the same time, and the unit line interlocking subsystem (3) will release the interlocking.

5. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The emergency unlocking subsystem (7) needs to be verified twice with the password before it can be verified. After the verification is completed, the command signal can skip the verification of the identity restriction subsystem (1), the primary equipment locking subsystem (2), the unit line locking subsystem (3) and the other factor locking subsystem (4) and directly execute the command signal (6).

6. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The locking information display device (8) comprises a body shell (8-1), a display screen (8-2), an alarm light (8-3) and a reset button (8-4); four display screens (8-2) are provided on the body shell (8-1), an alarm light (8-3) is provided above the display screen (8-2), and a reset button (8-4) is provided below the display screen (8-2).

7. The four-in-one anti-mistake locking system according to claim 1 is characterized in that: The system operation includes the following steps: Step 1: The monitoring system (5) receives the command signal (6) and transmits the command signal (6) to the four-in-one anti-error locking system for verification; Step 2: After receiving the command signal (6), the identity restriction subsystem (1) verifies the legitimacy of the operator's identity. After the verification is passed, the lock is released and the command model is transmitted to the primary equipment lock subsystem (2) for further verification; Step 3: After receiving the command signal (6), the primary equipment locking subsystem (2) verifies the legality of its operation. After the verification is passed, the locking is released and the command model is transmitted to the unit line locking subsystem (3) for further verification; Step 4: After receiving the command signal (6), the unit line locking subsystem (3) verifies the legality of its operation. After the verification is passed, the locking is released and the command model is transmitted to other factor locking subsystems (4) for further verification; Step 5: After receiving the command signal (6), the other factors blocking subsystem (4) verifies the legality of its operation. After the verification is passed, the blocking system releases all blocking; Step 6: The command signal (6) is verified by the entire locking system, and the monitoring system (5) immediately executes the operation command; Step 7: In an emergency state, the monitoring system (5) receives the command signal (6) and directly transmits the command signal (6) to the emergency unlocking subsystem (7). After the password of the emergency unlocking subsystem (7) is confirmed, the monitoring system (5) immediately executes the operation command.

8. The four-in-one anti-mistake locking system according to claim 7 is characterized in that: In the steps from Step 2 to Step 5, when the command signal (6) passes through any one of them and fails to pass its verification, the corresponding locking subsystem in the step cannot be unlocked, and the command signal (6) cannot be passed to the next step for further execution.

9. The four-in-one anti-mistake locking system according to claim 7 is characterized in that: In the steps from Step 2 to Step 5, the locking information display device (8) connected to the locking subsystem will display the locking status information of each step. When the command signal (6) fails to pass the verification of the locking subsystem, the locking information display device (8) will sound an alarm, and the monitoring personnel need to manually reset it after troubleshooting.

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