Application of Acrel-6000 Electrical Fire Monitoring System in Underground Space in the Central Area of ​​Lujiazui
This paper briefly describes the composition principle of the electrical fire monitoring system, and analyzes the design basis and related specifications of the electrical fire monitoring system in the application. Finally, through the introduction of Ankerui residual current electric fire monitoring system in the underground space of Lujiazui central area, the realization of the function of electric fire monitoring system and its significance are expounded.
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Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
0 Overview
The underground space project in the Lujiazui Central Area connects the three major skyscrapers in Lujiazui, Jinmao Tower, the World Financial Center, the “Shanghai Center†under construction, and the underground part of the commercial landmark “International Gold Center†to form a common underground space. . The monitoring scope of this project is the on-site power distribution cabinet of the underground passage.
A total of 58 ARCM200BL-J1 residual current meters are installed in the underground space of the Lujiazui central area. They are installed in the distribution cabinets of the underground passages, and each instrument is connected to a residual current transformer. The field instrument is connected to the Acrel-6000B wall-mounted electrical fire monitoring system of the control center by bus.
1 reference standard
In recent years, in order to increase the intensity of electrical fire monitoring and prevention, the state has successively formulated or revised a number of relevant standards and regulations to strengthen the prevention of electrical fires. There are:
1.1 is GB50045-95 (2005 edition) "High-rise civil building design fire code", which stipulates in clause 9.5.1: high-rise building fire hazard, personnel intensive places should be set up a leakage fire alarm system.
1.2 is GB50016-2006 "Code for Fire Protection of Building Design", which is specified in Article 11.2.7: The following places should be equipped with residual current action electrical fire monitoring system. These venues include various types of theaters, galleries, warehouses, residential communities, hospitals, shops, schools, and more.
1.3 The relevant provisions of the national standard "Building electrical fire prevention requirements and testing methods" also clearly require that "the residual current action protector that automatically cuts off the power or alarm should be set at the power incoming end".
1.4 The products of the electrical fire monitoring system shall meet: GB14287.1-2005 "Electrical fire monitoring equipment", GB14287.2-2005 "Residual current type electric fire monitoring detector", GB14287.3-2005 "Temperature type electric fire monitoring" detector"
1.5 The installation and operation of the electrical fire monitoring system shall meet the requirements of GB13955-2005 “Installation and Operation of Residual Current Action Protection Deviceâ€
1.6 The power supply of the electrical fire monitoring system shall meet the requirements of GB50052 “Design Specification for Power Supply and Distribution Systemâ€.
1.7 The design of the electrical fire monitoring system shall meet the requirements of the Design Method of Electrical Fire Monitoring System (Interim Provisions)
2 system components
The underground space electrical fire project in the central area of ​​Lujiazui consists of an electrical fire monitoring background, an electrical fire detector and a leakage current transformer.
The communication bus of this project is connected to two communication buses, which are respectively connected to the various power distribution cabinets on the site, and are connected to the corresponding buses. After the bus is connected hand in hand in a distribution box, it is connected to the wall-mounted background to form the aorta of the electrical fire system. The leakage current transformer in the drawer 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:
2.1 Station management
The management of the management of the electrical fire monitoring system is the direct window of human-computer interaction and the uppermost part of the system. Mainly by system software and necessary hardware equipment. 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 basement control room.
2.2 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.
2.3 Field device layer
The field device layer is a data acquisition terminal, mainly for the ARCM200BL-J1 series of residual electrical fire monitoring detectors.
The system structure topology is as follows: .jpg)
3 electrical fire equipment
3.1 Main equipment parameters: .jpg)
The main technical parameters power supply:
1 rated working voltage AC220V (-15% ~ +10%)
2 Backup power supply: maintain monitoring equipment when the main power supply is under voltage or power failure
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, ARCM200BL series instruments
The ARCM200BL residual current electrical fire monitoring detector is designed for TT and TN systems below 0.4kV. It monitors and manages the 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".
4 system function
4.1 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 cabinet lights up. The display indicates the alarm part and leakage, temperature value, record alarm time, sound and light alarm. Keep it until the detector is reset remotely by pressing the Reset button. The audible alarm signal can also be manually removed using the mute button.
4.2 control output function
When the monitored loop leakage alarm, the control output relay is closed to control the protected circuit or other equipment. When the alarm is eliminated, the control output relay is released.
4.3 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 cabinet 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.
4.4 self-test function
Check that all status indicators, displays, and audio devices in the device are working.
4.5 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.
4.6 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.
4.7 pairs of detector control functions
Through the system software operation, all the detectors connected to the device can be remotely controlled, including the setting of alarm setting value, communication address and other parameters and remote reset of the detector.
4.8 permission control function
In order to ensure the safe operation of the monitoring system, the operating authority of the monitoring device system software is divided into three levels, and operators of different levels have different operating rights.
5 Conclusion
The underground space electrical fire monitoring system in the central area of ​​Lujiazui consists of the electrical fire monitoring device Acrel-6000B and the leakage fire detector ARCM200BL-J1. 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 the fire control center of large shopping malls, living quarters, production bases, office buildings, shopping malls and other areas, and telemetry, remote adjustment, remote control and remote signaling of detectors scattered in the building are convenient for monitoring and management.
The system uses a standard Modbus field bus to connect detectors with communication functions. When the detected parameters in the field protection circuit exceed the alarm set value, the alarm signal and control signal can be issued, and the alarm part can be indicated and the alarm can be saved. information. The field instrument is connected to the Acrel-6000B 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. The application of Acrel-6000 electrical fire monitoring system in the underground space of the central area of ​​Lujiazui, real-time monitoring of the leakage of various electrical circuits on the site, sound and light alarm for the circuit with abnormal conditions, timely reminding the on-site duty personnel to ensure the safety and reliability of the power supply. And to avoid the loss of field equipment and casualties.
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
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