Ankerui Hu Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd., Jiangyin, Jiangsu 214405, China Abstract : Ankerui residual current electrical fire monitoring system uses ARCM residual current electrical fire monitoring devices or digital residual current transformers to conduct electrical fires on low voltage distribution systems in shopping malls, hotels, airports, banks, hospitals, and factories. monitor. This article focuses on the functions and significance of the Acrel-6000 electrical fire monitoring system through the introduction of the electrical fire monitoring system project of Longteng International Building. Keywords: electrical fire detectors monitoring equipment building 1 Introduction The Longteng International Building Project is located in the Jingyue West New Area, which is being built by the Changchun Municipal Government. It covers an area of ​​13,000 square meters and is built for 60,000 square meters. It consists of two 103-meter-tall Gemini buildings. Relying on the unique ecological resources, policy support and mature business atmosphere in Jingyue District. Longteng International Building is currently selling B-floor office products for a total of 25 floors. The project has a 10KV substation on the ground floor for the power supply of buildings A and B and the podium. A total of 487 0.4kV floor distribution box circuits require residual current monitoring. 2. System Requirements Analysis Detection of leakage current, over-current, over-temperature and other signals, sound and light signal alarm, accurately report the fault line address, monitor the changes in the point of failure. Store various fault and operation test signals to show system power status. 3. Reference standards In recent years, in order to increase the intensity of prevention and control of electrical fires, the state has successively formulated or revised a number of relevant standards and regulations to strengthen the prevention of electrical fires. There are: 3.1. GB 50016-2014 "Building Design Fire Protection Code" 3.2. GB 50054-2011 "Low Voltage Distribution Design Code" 3.3. JGJ 16-2008 "Civil Building Electrical Design Code" 3.4. GB 13955-2005 "Installation and operation of residual current protection devices" 3.5. GB 50055-2011 "General Electric Equipment Distribution Design Specification" 3.6. GB 50217-2007 "Power engineering cable design specifications" 3.7. GB 50116-2013 "Fire Automatic Alarm System Design Specification" 3.8. GB 14048.1-2006 "General principles for low-voltage switchgear and control equipment" 3.9. GB 14287.1-2014 "Electrical fire monitoring system Part 1: Electrical fire monitoring equipment" 3.10. GB 14287.2-2014 "Electrical fire monitoring system Part II: Residual current electrical fire monitoring detector" 3.11. GB 14287.3-2014 "Electrical fire monitoring system Part III: Temperature-type electrical fire monitoring detector" 3.12. GB 14287.4-2014 "Electrical fire monitoring system Part IV: Fault arc detector" 4. System composition Longteng International Building's electrical fire monitoring system consists of electrical fire monitoring equipment, electrical fire detectors and leakage current transformers. A total of six communication buses are connected to the project's communication bus. After the buses are connected in series in the power distribution room, they are connected to a wall-mounted background to form the main artery of the electrical fire system. The leakage current transformer in the box is connected to the leakage detector through the current line, and the leakage detector shows leakage in real time. The above constitutes a set of stable, accurate and reliable electrical fire monitoring systems. The system network is divided into three layers: 1) Station control management Station management The management personnel of the electrical fire monitoring system are the direct windows of human-computer interaction and the top part of the system. Mainly by the system software and necessary hardware devices, such as touch screen, UPS power supply and other components. The monitoring system software calculates, analyzes, and processes various types of data on the site, and responds to the on-site operations by means of graphics, digital display, sound, and indicator lights. Monitoring host: used for data acquisition, processing and data forwarding. Provides data interfaces within or outside the system for system management, maintenance, and analysis. UPS: Ensure the normal power supply of the computer monitoring system. When the power supply problem occurs in the entire system, ensure the normal operation of the station control and management equipment. Background monitoring equipment is set in the self-dimensional substation. 2) Network communication layer Communication medium: The system mainly adopts shielded twisted pair, uses RS485 interface and MODBUS communication protocol to realize real-time communication between field device and host computer. 3) Field equipment layer The field equipment layer is a data acquisition terminal, mainly for the ARCM300 series of residual electrical fire monitoring detectors. The topology of the system structure is shown in the figure below: 5. Electrical fire equipment 5.1, Acrel-6000 Electrical Fire Monitoring Background: The main technical parameters power supply: 1 rated working voltage AC220V (-15% ~ +10%) 2 Standby power supply: When the main power supply is under voltage or power failure, maintain the monitoring equipment working time ≥ 4 hours Work system: 24-hour work 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 cell attributes (position, type) 2 Temperature alarm (over temperature): Fault cell attributes (part, type) 3 Current fault (overcurrent): Fault cell attributes (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 eliminated manually, when it is alarm signal input again, it can start again Fault alarm item: 1 An open circuit or short circuit occurred in the communication cable between the monitoring equipment and the detector 2 Monitoring equipment main power supply undervoltage or power failure 3 An open circuit or short circuit occurred in the connection between the battery charger and the battery 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 maintained until troubleshooting Fault alarm sound signal: can be eliminated manually, when the alarm signal input again, can start again During faults, normal operation of non-failed circuits is not affected Control output: Alarm control output: 1 set of normally open passive contacts, capacity: AC250V 3A or DC30V 3A Self-inspection project: 1 Indicator Check: Alarm, Fault, Operation, Main Power, Standby Power Indicator 2 display check 3 audio device inspection Self-check time ≤60s record: 1 Record content: record type, occurrence time, detector number, area, fault description, no less than 20,000 records can be stored 2 record query: according to the record of the date, type and other conditions Operation rating: 1 daily shift: real-time status monitoring, event record query 2 monitoring operation level: real-time status monitoring, event record query, remote reset of the detector, device self-test 3 System management level: real-time status monitoring, event record query, remote reset of detector, device self-check, system parameter query of monitoring equipment, individual detection of each module of monitoring equipment, operator addition and deletion Use environmental conditions: 1 Workplace: fire control room, manned power distribution (distribution room), on-call room walls 2 working environment temperature: 0 °C ~ 40 °C 3 working environment relative humidity: 5% to 95% RH 4 Altitude: ≤2500m 6 System Functions 6.1. Monitoring alarm function: The monitoring equipment can receive the leakage and temperature information of multiple detectors. When the alarm sounds, an audible and visual alarm signal is emitted. At the same time, the red “alarm†indicator light on the equipment is on. The display indicates the alarm location and type of alarm, records the alarm time, and the sound and light alarm keeps Until the display resets the detector remotely. The audible alarm signal can also be manually cancelled using the display “Mute†button. 6.2. Fault alarm function Communication failure alarm: When a communication failure occurs between the monitoring device and any connected detector, the corresponding detector in the monitoring screen displays a fault prompt, and the yellow “fault†indicator light on the device is on, and a fault alarm sound is emitted. . Power failure alarm: When the main power supply or standby power supply 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 cancel the alarm sound. 6.3. Self-test function Check if all the status indicators, display screens and speakers in the device are normal. 6.4. Alarm Record Storage Query Function When leakage, over temperature alarm, or communication or power failure occurs, the alarm location, fault information, alarm time, and other information are stored in the database. When the alarm is removed and the fault is eliminated, it is also recorded. Historical data provides a variety of convenient and fast methods for searching. 6.5. Power Function When the main power supply has a power failure or undervoltage, the monitoring device can automatically switch to the standby power supply. When the main power supply resumes normal power supply, it automatically switches back to the main power supply, ensuring continuous and smooth operation of the monitoring device during the switchover process. 6.6. Detector Control Functions By monitoring the software operation, remote reset control can be performed on all detectors connected to the device. 6.7. Authority Control Function In order to ensure the safe operation of the monitoring system, the monitoring device software operating authority is divided into three levels, and different levels of operators have different operating rights. 7. Conclusion With the development of smart buildings and the widespread use of electricity, people have become more aware of security awareness. The installation of leakage current fire system in public buildings is an inevitable trend of intelligent construction. The electrical fire system is conducive to discovering hidden dangers and dealing with hidden dangers in time. It is of great significance to prevent fires from happening. Since the system was put into operation, many hidden dangers have been discovered and rectified, which provided scientific basis for the project's fire control management and received favorable comments from customers. Longteng International Building's electrical fire monitoring system consists of three electrical fire monitoring devices Acrel-6000/B and 487 electrical fire detectors ARCM300. Acrel-6000 electrical fire monitoring system is an independent research and development by the company to receive the residual current electrical fire detectors and other field equipment signals, in order to achieve the protection of the electrical circuit alarm, monitoring, control, management of the computer running on the industrial level Hardware/software system. references [1]. Ren Cheng, Zhou Zhongzhong. Principles and Application Guide for Digital Meters for Electric Power Measurement [M]. Beijing. China Electric Power Press, 2007. 4 [2].Zhou Zhong. Application of Electric Power Meters in Energy Metering of Large-scale Public Buildings [J]. Modern Building Electric 2010. 6 All In One Pc Core I5,Pc All In One Intel Core I5,All In One Core I5 8Gb Ram,All In One I5 Desktop Computer Guangdong Elieken Electronic Technology Co.,Ltd. , https://www.elieken.com
