This paper briefly describes the composition principle of electrical fire monitoring system and fire equipment power monitoring system, and analyzes the design basis and related specifications of electrical fire monitoring system and fire equipment power monitoring system.
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
0 Overview
This project is the supporting facility for the entrance and exit of No. 1 Nanchansi Station, with an area of ​​1329.65 square meters and a height of 17.6 meters. This project is a multi-storey building. The fire protection and underground two-story electrical load level is one level, and the remaining electric load level is three, using 380V low voltage power supply.
The monitoring scope of the electrical fire monitoring system of this project is 6 ARCM200 series instruments in the distribution box of the upper floor of Nanchansi subway. This project is mainly responsible for monitoring the leakage status of the low-voltage outlets distributed in the distribution box, and promptly reminding the duty-keeping personnel in the control room to prevent electrical fires. The field instrument is connected to the Acrel-6000/B wall-mounted electrical fire monitoring system by means of bus.
The fire protection equipment power monitoring system of this project is designed to cover the power supply circuit of the fire protection equipment of the Nanchansi subway. There are 9 three-phase dual power distribution boxes. In this project, the fire equipment power supply voltage signal sensor is installed in the fire load distribution box. The fire equipment power status monitor is set in the fire control room, and the system adopts the bus form networking.
1 reference standard
1.1 The electrical fire monitoring system shall be designed to meet the manufacturing and testing standards listed below:
1) GB50045-95 (2005 edition) "Fire Protection Code for High-rise Civil Buildings"
2) GB50016-2006 "Code for Fire Protection of Building Design"
3) GB14287.1-2005 "Electrical Fire Monitoring Equipment"
4) GB14287.2-2005 "Residual current type electrical fire monitoring detector"
5) GB14287.3-2005 "Temperature Type Electric Fire Monitoring Detector"
6) GB13955-2005 "Residual Current Action Protection Device Installation and Operation"
7) GB50052 "Design Specification for Power Supply and Distribution System"
1.2 Fire-fighting equipment The power monitoring system shall be designed to meet the manufacturing and testing standards listed below:
1) GB/50198 "Technical Specifications for Monitoring System Engineering"
2) GB28184-2011 "Fire Equipment Power Monitoring System"
3) GB25506-2010 "General Technical Requirements for Fire Control Room"
4) GB50016-2006 "Code for Fire Protection of Building Design"
5) GB50303-2002 "Code for Construction Quality Acceptance of Building Electrical Installations"
6) JGJ 16-2008 "Electrical Design Code for Civil Buildings"
2 system components
2.1 Electrical fire monitoring system composition
The electrical fire monitoring system project of the Nanchansi subway superstructure is composed of electrical fire monitoring background, electrical fire detector and leakage current transformer. The communication of this project uses one RS485 communication bus to access the wall-mounted background. The leakage current transformer in the cabinet is connected to the leakage detector through the current line, and the leakage detector displays the leakage condition in real time. The above describes a set of electrical fire monitoring systems with stable signal and reliable accuracy. The system networking is divided into three layers:
1) Station management
The management of the station control management system for the electrical fire monitoring system is the direct window of human-computer interaction and the uppermost part of the system. Mainly composed of system software and necessary hardware equipment, such as touch screen, UPS power supply and so on. The monitoring system software calculates, analyzes, and processes various types of data information on the site, and responds to the on-site transportation situation by means of graphics, digital display, sound, and indicator lights.
Monitoring host: used for data collection, processing, and data forwarding. Provides data interfaces for system management, maintenance, and analysis within and outside the system.
UPS: Ensure the normal power supply of the computer monitoring system, and ensure the normal operation of the station management management equipment when the whole system has power supply problems.
The background monitoring device is set in the control room.
2) Network communication layer
Communication medium: The system mainly adopts shielded twisted pair cable, realizes real-time communication between field device and host computer by RS485 interface and MODBUS communication protocol.
3) Field device layer
The field device layer is a data acquisition terminal, mainly for the ARCM200 series residual electrical fire monitoring detector.
The system structure topology is as follows:
.png)
2.2 Fire equipment power monitoring system composition
The Nanchan Temple subway superstructure project fire protection equipment power monitoring system uses the fire equipment power state monitor + voltage sensor's two-layer structure networking mode. According to the actual requirements of the project, the voltage sensor model for the fire protection equipment power monitoring system is: AFPM3-2AV, the fire equipment power status monitor model is: AFPM100/B; AFPM100/B is set in the fire control room, and one RS485 is drawn. The bus and DC24V power cord are connected to sensors in the field distribution box. The system topology is as follows:
.png)
3 monitoring system equipment.png)
3.1, Acrel-6000 electrical fire monitoring background:
The main technical parameters
power supply:
1 rated working voltage AC220V (-15% ~ +10%)
2 Backup power supply: When the main power supply is under voltage or power failure, maintain the monitoring equipment working time ≥ 4 hours
Working system:
24-hour work schedule
communication method:
RS485 bus communication, Modbus-RTU communication protocol, transmission distance 1km, can extend communication transmission distance through repeater
Monitoring capacity:
1 Monitoring equipment can monitor up to 200 monitoring units (detectors)
2 can be connected with ARCM series monitoring detector
Monitoring alarm items:
1 Residual current fault (leakage): fault unit attribute (part, type)
2 Temperature alarm (over temperature): Fault unit attribute (part, type)
3 Current fault (overcurrent): Fault unit attribute (part, type)
Monitoring alarm response time: ≤30s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: red LED indicator, red light alarm signal should be maintained until manual reset
Monitoring alarm sound signal: can be manually eliminated, can be started again when there is alarm signal input again
Fault alarm item:
1 The communication cable between the monitoring device and the detector is open or shorted.
2 Monitoring equipment main power supply undervoltage or power failure
3 The cable between the charger that charges the battery and the battery is broken or shorted.
Fault alarm response time: ≤100s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: yellow LED indicator, yellow light alarm signal should be kept until troubleshooting
Fault alarm sound signal: can be manually eliminated, can be started again when there is an alarm signal input again
The normal operation of the non-faulty loop is not affected during the fault
Control output:
Alarm control output: 1 set of normally open passive contacts, capacity: AC250V 3A or DC30V 3A
Self-test items:
1 Indicator check: alarm, fault, operation, main power, standby power indicator
2 display check
3 audio device inspection
Self-test time ≤60s
record:
1 Record content: record type, time of occurrence, detector number, area, fault description, can store no less than 20,000 records
2 record query: query according to the date, type and other conditions of the record
Operational rating:
1 Daily duty class: real-time status monitoring, event record query
2 Monitoring operation level: real-time status monitoring, event record query, detector remote reset, device self-test
3 System management level: real-time status monitoring, event record query, detector remote reset, device self-test, monitoring device system parameter query, monitoring device module detection, operator addition and deletion
Environmental conditions used:
1 Workplace: Fire control room, manned substation (distribution room), wall on room where someone is on duty
2 Working environment temperature: 0 ° C ~ 40 ° C
3 Working environment relative humidity: 5% ~ 95% RH
4 Altitude: ≤2500m
3.2, ARCM200 series instruments.png)
The ARCM200 residual current electrical fire monitoring detector is designed for TT and TN systems below 0.4kV. It monitors and manages fire risk parameters such as residual current, conductor temperature, overcurrent and overvoltage in the distribution circuit. Thereby preventing the occurrence of electrical fires and real-time monitoring of various power parameters, providing accurate data for energy management. The product adopts advanced microcontroller technology, with high integration, small size, convenient installation, intelligent, digital and networked. It is an ideal choice for building electrical fire prevention monitoring and system insulation aging prediction. The product complies with the standard requirements of GB14287.2-2005 "Electrical Fire Monitoring System Part 2: Residual Current Electrical Fire Monitoring Detector".
3.3, Acrel-6000 electrical fire monitoring background:
The main technical parameters
power supply:
1 main power supply: AC220V 50Hz (allows 85%-110% range change)
2 standby power supply: when the main power supply is low voltage or power failure, maintain the monitoring equipment working time ≥ 8h
3 monitor provides DC24V power supply for connected modules (voltage/current signal sensor)
Work system: 24-hour work system
Communication method: Modbus-RTU communication protocol, RS485 half-duplex bus mode, transmission distance of 500m (if it exceeds the transmission distance through the repeater).
Monitoring capacity: ≤128 points
Operational rating
1 Daily duty class: real-time status monitoring, history query.
2 Monitoring operation level: real-time status monitoring, history query, remote reset of detector.
3 System management level: real-time status monitoring, history query, remote reset of detectors, remote modification of detector parameters, system parameter setting and modification of monitoring equipment, operator addition and deletion.
Environmental conditions
1 Workplace: Fire control room, or installed side by side with fire control console
2 Working environment temperature: -10 ° C ~ +55 ° C
3 Working environment relative humidity: ≤95% no condensation
4 Altitude: ≤2500m
5 Pollution degree: Class III, installation category: Level III
Main components
1 Display mode: 320*240 dot matrix liquid crystal;
2 input and output modules: built-in remote intelligent I / O module;
3 sound and light alarm module: built-in speaker, buzzer and LED indicator;
4 backup power: DC24V, 10Ah (optional with your larger capacity battery)
3.4, AFPM3 series instruments
Real-time monitoring of one-way three-phase AC voltage/current, or two three-phase voltages; with overvoltage, undervoltage, phase loss, phase error, overcurrent (current sensing products only) alarm; one or two channels available (only Monitor two-way three-phase AC voltage products) switch input function, can monitor switch status; provide one-way relay output, can be connected to alarm control loop; with event storage function, alarm can record the time, type and parameter of alarm occurrence, according to alarm The record can analyze the situation on the spot and provide the basis for eliminating the fault. With the fieldbus communication technology, the host computer management software can monitor the operation of the site at all times and timely discover the alarm information. Through the RS485 interface, the standard MODBUS protocol can be connected to various standard systems; high integration, network, high degree of intelligence, and reasonable operating characteristics;
4 system function
4.1. Electrical fire monitoring system function
4.1.1. Monitoring alarm function:
The monitoring equipment can receive the leakage and temperature information of multiple detectors, and emit an audible and visual alarm signal when the alarm occurs. At the same time, the red “alarm†indicator on the device lights up, the display indicates the alarm location and alarm type, and the alarm time is recorded. The sound and light alarm is always maintained. Until the display is reset by pressing the display "Reset" button. The audible alarm signal can also be manually removed using the display "Muffler" button.
4.1.2. Fault alarm function
Communication failure alarm: When a communication failure occurs between the monitoring device and any of the connected detectors, the corresponding detector in the monitoring screen displays a fault indication, and the yellow “fault†indicator on the device lights up, and a fault alarm sound is emitted. .
Power failure alarm: When the main power or backup power fails, the monitoring device also emits an audible and visual alarm signal and displays the fault information. You can enter the corresponding interface to view the detailed information and release the alarm sound.
4.1.3. Self-test function
Check that all status indicators, display, and speakers in the device are normal.
4.1.4. Alarm record storage query function
When leakage, over-temperature alarm or communication or power failure occurs, the alarm part, fault information, alarm time and other information are stored in the database. When the alarm is cancelled or the fault is eliminated, the same is recorded. Historical data provides a variety of convenient and fast ways to query.
4.1.5. Power function
When the main power supply has a power failure, undervoltage, etc., the monitoring equipment can automatically switch to the standby power supply. When the main power supply returns to normal power supply, it automatically switches back to the main power supply, ensuring continuous and smooth operation of the monitoring equipment during the switching process.
4.1.6. Detector control function
Remote monitoring of all detectors connected to the unit is possible through monitoring software operation.
4.1.7. Authority Control Function
In order to ensure the safe operation of the monitoring system, the monitoring device software operation authority is divided into three levels, and different levels of operators have different operation rights.
4.2. Fire equipment power monitoring system function
4.2.1. Monitoring alarm function
Monitored device power loop switch status
Working status of the monitored equipment power supply (voltage, current and alarm status information)
Alarm response time: ≤100s
Alarm sound signal: can be manually eliminated, can be started again when there is an alarm signal input again
Alarm light signal: red LED indicator is always on![China Hardware Business Network]()
4.2.2 Control output function
Remote remote operation of alarm relays for individual or all monitored equipment
Monitor control output: normally open passive contact, capacity: AC250V 3A or DC30V 3A![China Hardware Business Network]()
4.2.3. Fault alarm function
The connection between the monitor and the module (voltage/current signal sensor) is open and shorted
Monitor mains undervoltage (≤80% mains voltage) or overvoltage (≥110% mains voltage)
The connection between the monitor and its separate power supply is open and shorted.
When the above fault occurs in the monitor, it can emit an acousto-optic fault alarm signal that is clearly different from the monitoring alarm signal.
Fault alarm response time: ≤100s
Fault alarm sound signal: manual elimination, can be started again when there is alarm signal input again
Fault alarm light signal: yellow LED indicator is always on
The normal operation of the non-faulty loop is not affected during the fault![China Hardware Business Network]()
4.2.4. Self-test function
Connection check: open and short circuit of communication line and split power line
Equipment self-test: manual inspection or system self-test
Self-test time: ≤60s![China Hardware Business Network]()
4.2.5. Alarm record function
Record 10000 related fault alarm information
Alarm type: fault type, time of occurrence, fault description
Alarm event query
Alarm record printing
4.2.6. Printing function
The monitoring system can print Chinese characters and print alarm events and time, fault events and time.
4.2.7. Silencing
In the event of an alarm such as an alarm or a fault, the speaker of the monitoring device will give a corresponding alarm sound to prompt, press the “mute†button to terminate the alarm, and the alarm light will be green. During the period, the staff can handle the faults. Everything returned to normal and the alarm light went out. If a new fault occurs, the silence indicator will turn off and the speaker will sound an alarm again.
5 Conclusion
The electric fire monitoring system of the Nanchansi subway superstructure is composed of the electric fire monitoring device Acrel-6000/B and the leakage fire detector leakage electric detector ARCM200. The Acrel-6000 electrical fire monitoring system is an industrial grade that is independently developed by the company to receive field devices such as residual current electrical fire detectors to achieve alarm, monitoring, control, and management of protected electrical circuits. Hardware/software system. The system is applied to fire control centers in large shopping malls, living quarters, production bases, office buildings, shopping malls, hospitals, etc., and telemetry, remote adjustment, remote control, and remote signaling of detectors dispersed in the building are convenient for monitoring and control. management. The system uses a standard Modbus field bus to connect detectors with communication functions. When the detected parameter in the field protection circuit exceeds the alarm set value, it can send out alarm signals and control signals, can indicate the alarm part and save the alarm. information. The field instrument is connected to the Acrel-6000/B wall-mounted electrical fire monitoring system of the control center by bus. The system has the advantages of convenient installation and transportation, high cost performance and convenient maintenance.
Nanchansi subway superstructure project fire equipment power monitoring system can monitor the power of fire equipment in real time, by detecting the voltage, current, switch status and other related equipment power information of the fire equipment, to determine whether the power equipment has an open circuit, Fault information such as short circuit, over voltage, under voltage, phase loss, phase error and over current (overload) are alarmed and recorded. The system is reliable, real-time and features digital, intelligent, networked, automated and continuous monitoring. Real-time reflection of the status of the power of the monitored equipment, and centralized display, which can effectively avoid the critical situation that the fire-fighting equipment can not work normally due to power failure during the fire, and maximize the reliability of the fire-fighting linkage system.
references
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guidelines of Power Electrical Measurement Digital Instrumentation [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large public buildings [J]. Modern Building Electric 2010. 6
About the Author
Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
0 Overview
This project is the supporting facility for the entrance and exit of No. 1 Nanchansi Station, with an area of ​​1329.65 square meters and a height of 17.6 meters. This project is a multi-storey building. The fire protection and underground two-story electrical load level is one level, and the remaining electric load level is three, using 380V low voltage power supply.
The monitoring scope of the electrical fire monitoring system of this project is 6 ARCM200 series instruments in the distribution box of the upper floor of Nanchansi subway. This project is mainly responsible for monitoring the leakage status of the low-voltage outlets distributed in the distribution box, and promptly reminding the duty-keeping personnel in the control room to prevent electrical fires. The field instrument is connected to the Acrel-6000/B wall-mounted electrical fire monitoring system by means of bus.
The fire protection equipment power monitoring system of this project is designed to cover the power supply circuit of the fire protection equipment of the Nanchansi subway. There are 9 three-phase dual power distribution boxes. In this project, the fire equipment power supply voltage signal sensor is installed in the fire load distribution box. The fire equipment power status monitor is set in the fire control room, and the system adopts the bus form networking.
1 reference standard
1.1 The electrical fire monitoring system shall be designed to meet the manufacturing and testing standards listed below:
1) GB50045-95 (2005 edition) "Fire Protection Code for High-rise Civil Buildings"
2) GB50016-2006 "Code for Fire Protection of Building Design"
3) GB14287.1-2005 "Electrical Fire Monitoring Equipment"
4) GB14287.2-2005 "Residual current type electrical fire monitoring detector"
5) GB14287.3-2005 "Temperature Type Electric Fire Monitoring Detector"
6) GB13955-2005 "Residual Current Action Protection Device Installation and Operation"
7) GB50052 "Design Specification for Power Supply and Distribution System"
1.2 Fire-fighting equipment The power monitoring system shall be designed to meet the manufacturing and testing standards listed below:
1) GB/50198 "Technical Specifications for Monitoring System Engineering"
2) GB28184-2011 "Fire Equipment Power Monitoring System"
3) GB25506-2010 "General Technical Requirements for Fire Control Room"
4) GB50016-2006 "Code for Fire Protection of Building Design"
5) GB50303-2002 "Code for Construction Quality Acceptance of Building Electrical Installations"
6) JGJ 16-2008 "Electrical Design Code for Civil Buildings"
2 system components
2.1 Electrical fire monitoring system composition
The electrical fire monitoring system project of the Nanchansi subway superstructure is composed of electrical fire monitoring background, electrical fire detector and leakage current transformer. The communication of this project uses one RS485 communication bus to access the wall-mounted background. The leakage current transformer in the cabinet is connected to the leakage detector through the current line, and the leakage detector displays the leakage condition in real time. The above describes a set of electrical fire monitoring systems with stable signal and reliable accuracy. The system networking is divided into three layers:
1) Station management
The management of the station control management system for the electrical fire monitoring system is the direct window of human-computer interaction and the uppermost part of the system. Mainly composed of system software and necessary hardware equipment, such as touch screen, UPS power supply and so on. The monitoring system software calculates, analyzes, and processes various types of data information on the site, and responds to the on-site transportation situation by means of graphics, digital display, sound, and indicator lights.
Monitoring host: used for data collection, processing, and data forwarding. Provides data interfaces for system management, maintenance, and analysis within and outside the system.
UPS: Ensure the normal power supply of the computer monitoring system, and ensure the normal operation of the station management management equipment when the whole system has power supply problems.
The background monitoring device is set in the control room.
2) Network communication layer
Communication medium: The system mainly adopts shielded twisted pair cable, realizes real-time communication between field device and host computer by RS485 interface and MODBUS communication protocol.
3) Field device layer
The field device layer is a data acquisition terminal, mainly for the ARCM200 series residual electrical fire monitoring detector.
The system structure topology is as follows:
2.2 Fire equipment power monitoring system composition
The Nanchan Temple subway superstructure project fire protection equipment power monitoring system uses the fire equipment power state monitor + voltage sensor's two-layer structure networking mode. According to the actual requirements of the project, the voltage sensor model for the fire protection equipment power monitoring system is: AFPM3-2AV, the fire equipment power status monitor model is: AFPM100/B; AFPM100/B is set in the fire control room, and one RS485 is drawn. The bus and DC24V power cord are connected to sensors in the field distribution box. The system topology is as follows:
3 monitoring system equipment
3.1, Acrel-6000 electrical fire monitoring background:
The main technical parameters
power supply:
1 rated working voltage AC220V (-15% ~ +10%)
2 Backup power supply: When the main power supply is under voltage or power failure, maintain the monitoring equipment working time ≥ 4 hours
Working system:
24-hour work schedule
communication method:
RS485 bus communication, Modbus-RTU communication protocol, transmission distance 1km, can extend communication transmission distance through repeater
Monitoring capacity:
1 Monitoring equipment can monitor up to 200 monitoring units (detectors)
2 can be connected with ARCM series monitoring detector
Monitoring alarm items:
1 Residual current fault (leakage): fault unit attribute (part, type)
2 Temperature alarm (over temperature): Fault unit attribute (part, type)
3 Current fault (overcurrent): Fault unit attribute (part, type)
Monitoring alarm response time: ≤30s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: red LED indicator, red light alarm signal should be maintained until manual reset
Monitoring alarm sound signal: can be manually eliminated, can be started again when there is alarm signal input again
Fault alarm item:
1 The communication cable between the monitoring device and the detector is open or shorted.
2 Monitoring equipment main power supply undervoltage or power failure
3 The cable between the charger that charges the battery and the battery is broken or shorted.
Fault alarm response time: ≤100s
Monitoring alarm sound pressure level (A weighting): ≥70dB/1m
Monitoring alarm light display: yellow LED indicator, yellow light alarm signal should be kept until troubleshooting
Fault alarm sound signal: can be manually eliminated, can be started again when there is an alarm signal input again
The normal operation of the non-faulty loop is not affected during the fault
Control output:
Alarm control output: 1 set of normally open passive contacts, capacity: AC250V 3A or DC30V 3A
Self-test items:
1 Indicator check: alarm, fault, operation, main power, standby power indicator
2 display check
3 audio device inspection
Self-test time ≤60s
record:
1 Record content: record type, time of occurrence, detector number, area, fault description, can store no less than 20,000 records
2 record query: query according to the date, type and other conditions of the record
Operational rating:
1 Daily duty class: real-time status monitoring, event record query
2 Monitoring operation level: real-time status monitoring, event record query, detector remote reset, device self-test
3 System management level: real-time status monitoring, event record query, detector remote reset, device self-test, monitoring device system parameter query, monitoring device module detection, operator addition and deletion
Environmental conditions used:
1 Workplace: Fire control room, manned substation (distribution room), wall on room where someone is on duty
2 Working environment temperature: 0 ° C ~ 40 ° C
3 Working environment relative humidity: 5% ~ 95% RH
4 Altitude: ≤2500m
3.2, ARCM200 series instruments
The ARCM200 residual current electrical fire monitoring detector is designed for TT and TN systems below 0.4kV. It monitors and manages fire risk parameters such as residual current, conductor temperature, overcurrent and overvoltage in the distribution circuit. Thereby preventing the occurrence of electrical fires and real-time monitoring of various power parameters, providing accurate data for energy management. The product adopts advanced microcontroller technology, with high integration, small size, convenient installation, intelligent, digital and networked. It is an ideal choice for building electrical fire prevention monitoring and system insulation aging prediction. The product complies with the standard requirements of GB14287.2-2005 "Electrical Fire Monitoring System Part 2: Residual Current Electrical Fire Monitoring Detector".
3.3, Acrel-6000 electrical fire monitoring background:
The main technical parameters
power supply:
1 main power supply: AC220V 50Hz (allows 85%-110% range change)
2 standby power supply: when the main power supply is low voltage or power failure, maintain the monitoring equipment working time ≥ 8h
3 monitor provides DC24V power supply for connected modules (voltage/current signal sensor)
Work system: 24-hour work system
Communication method: Modbus-RTU communication protocol, RS485 half-duplex bus mode, transmission distance of 500m (if it exceeds the transmission distance through the repeater).
Monitoring capacity: ≤128 points
Operational rating
1 Daily duty class: real-time status monitoring, history query.
2 Monitoring operation level: real-time status monitoring, history query, remote reset of detector.
3 System management level: real-time status monitoring, history query, remote reset of detectors, remote modification of detector parameters, system parameter setting and modification of monitoring equipment, operator addition and deletion.
Environmental conditions
1 Workplace: Fire control room, or installed side by side with fire control console
2 Working environment temperature: -10 ° C ~ +55 ° C
3 Working environment relative humidity: ≤95% no condensation
4 Altitude: ≤2500m
5 Pollution degree: Class III, installation category: Level III
Main components
1 Display mode: 320*240 dot matrix liquid crystal;
2 input and output modules: built-in remote intelligent I / O module;
3 sound and light alarm module: built-in speaker, buzzer and LED indicator;
4 backup power: DC24V, 10Ah (optional with your larger capacity battery)
3.4, AFPM3 series instruments
Real-time monitoring of one-way three-phase AC voltage/current, or two three-phase voltages; with overvoltage, undervoltage, phase loss, phase error, overcurrent (current sensing products only) alarm; one or two channels available (only Monitor two-way three-phase AC voltage products) switch input function, can monitor switch status; provide one-way relay output, can be connected to alarm control loop; with event storage function, alarm can record the time, type and parameter of alarm occurrence, according to alarm The record can analyze the situation on the spot and provide the basis for eliminating the fault. With the fieldbus communication technology, the host computer management software can monitor the operation of the site at all times and timely discover the alarm information. Through the RS485 interface, the standard MODBUS protocol can be connected to various standard systems; high integration, network, high degree of intelligence, and reasonable operating characteristics;
4 system function
4.1. Electrical fire monitoring system function
4.1.1. Monitoring alarm function:
The monitoring equipment can receive the leakage and temperature information of multiple detectors, and emit an audible and visual alarm signal when the alarm occurs. At the same time, the red “alarm†indicator on the device lights up, the display indicates the alarm location and alarm type, and the alarm time is recorded. The sound and light alarm is always maintained. Until the display is reset by pressing the display "Reset" button. The audible alarm signal can also be manually removed using the display "Muffler" button.
4.1.2. Fault alarm function
Communication failure alarm: When a communication failure occurs between the monitoring device and any of the connected detectors, the corresponding detector in the monitoring screen displays a fault indication, and the yellow “fault†indicator on the device lights up, and a fault alarm sound is emitted. .
Power failure alarm: When the main power or backup power fails, the monitoring device also emits an audible and visual alarm signal and displays the fault information. You can enter the corresponding interface to view the detailed information and release the alarm sound.
4.1.3. Self-test function
Check that all status indicators, display, and speakers in the device are normal.
4.1.4. Alarm record storage query function
When leakage, over-temperature alarm or communication or power failure occurs, the alarm part, fault information, alarm time and other information are stored in the database. When the alarm is cancelled or the fault is eliminated, the same is recorded. Historical data provides a variety of convenient and fast ways to query.
4.1.5. Power function
When the main power supply has a power failure, undervoltage, etc., the monitoring equipment can automatically switch to the standby power supply. When the main power supply returns to normal power supply, it automatically switches back to the main power supply, ensuring continuous and smooth operation of the monitoring equipment during the switching process.
4.1.6. Detector control function
Remote monitoring of all detectors connected to the unit is possible through monitoring software operation.
4.1.7. Authority Control Function
In order to ensure the safe operation of the monitoring system, the monitoring device software operation authority is divided into three levels, and different levels of operators have different operation rights.
4.2. Fire equipment power monitoring system function
4.2.1. Monitoring alarm function
Monitored device power loop switch status
Working status of the monitored equipment power supply (voltage, current and alarm status information)
Alarm response time: ≤100s
Alarm sound signal: can be manually eliminated, can be started again when there is an alarm signal input again
Alarm light signal: red LED indicator is always on
4.2.2 Control output function
Remote remote operation of alarm relays for individual or all monitored equipment
Monitor control output: normally open passive contact, capacity: AC250V 3A or DC30V 3A
4.2.3. Fault alarm function
The connection between the monitor and the module (voltage/current signal sensor) is open and shorted
Monitor mains undervoltage (≤80% mains voltage) or overvoltage (≥110% mains voltage)
The connection between the monitor and its separate power supply is open and shorted.
When the above fault occurs in the monitor, it can emit an acousto-optic fault alarm signal that is clearly different from the monitoring alarm signal.
Fault alarm response time: ≤100s
Fault alarm sound signal: manual elimination, can be started again when there is alarm signal input again
Fault alarm light signal: yellow LED indicator is always on
The normal operation of the non-faulty loop is not affected during the fault
4.2.4. Self-test function
Connection check: open and short circuit of communication line and split power line
Equipment self-test: manual inspection or system self-test
Self-test time: ≤60s
4.2.5. Alarm record function
Record 10000 related fault alarm information
Alarm type: fault type, time of occurrence, fault description
Alarm event query
Alarm record printing
4.2.6. Printing function
The monitoring system can print Chinese characters and print alarm events and time, fault events and time.
4.2.7. Silencing
In the event of an alarm such as an alarm or a fault, the speaker of the monitoring device will give a corresponding alarm sound to prompt, press the “mute†button to terminate the alarm, and the alarm light will be green. During the period, the staff can handle the faults. Everything returned to normal and the alarm light went out. If a new fault occurs, the silence indicator will turn off and the speaker will sound an alarm again.
5 Conclusion
The electric fire monitoring system of the Nanchansi subway superstructure is composed of the electric fire monitoring device Acrel-6000/B and the leakage fire detector leakage electric detector ARCM200. The Acrel-6000 electrical fire monitoring system is an industrial grade that is independently developed by the company to receive field devices such as residual current electrical fire detectors to achieve alarm, monitoring, control, and management of protected electrical circuits. Hardware/software system. The system is applied to fire control centers in large shopping malls, living quarters, production bases, office buildings, shopping malls, hospitals, etc., and telemetry, remote adjustment, remote control, and remote signaling of detectors dispersed in the building are convenient for monitoring and control. management. The system uses a standard Modbus field bus to connect detectors with communication functions. When the detected parameter in the field protection circuit exceeds the alarm set value, it can send out alarm signals and control signals, can indicate the alarm part and save the alarm. information. The field instrument is connected to the Acrel-6000/B wall-mounted electrical fire monitoring system of the control center by bus. The system has the advantages of convenient installation and transportation, high cost performance and convenient maintenance.
Nanchansi subway superstructure project fire equipment power monitoring system can monitor the power of fire equipment in real time, by detecting the voltage, current, switch status and other related equipment power information of the fire equipment, to determine whether the power equipment has an open circuit, Fault information such as short circuit, over voltage, under voltage, phase loss, phase error and over current (overload) are alarmed and recorded. The system is reliable, real-time and features digital, intelligent, networked, automated and continuous monitoring. Real-time reflection of the status of the power of the monitored equipment, and centralized display, which can effectively avoid the critical situation that the fire-fighting equipment can not work normally due to power failure during the fire, and maximize the reliability of the fire-fighting linkage system.
references
[1]. Ren Zhicheng Zhou Zhong. Principles and Application Guidelines of Power Electrical Measurement Digital Instrumentation [M]. Beijing. China Electric Power Press. 2007. 4
[2]. Zhou Zhong. Application of power meter in electric energy metering of large public buildings [J]. Modern Building Electric 2010. 6
About the Author
Yang Junjun, female, undergraduate. Position: Now working for Ankerui Electric Co., Ltd., contact number, mobile phone, QQ
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