Application of Acrel-6000 Electrical Fire Monitoring System in Texas Archives
Ankerui Qingqing Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405 Abstract The Ankerui residual current electrical fire monitoring system is used to monitor electrical fires in low-voltage distribution systems such as shopping malls, hotels, airports, banks, hospitals and factories through ARCM residual current electrical fire monitoring devices. This article focuses on the functions and significance of the Acrel-6000/B electrical fire monitoring system through the introduction of the Texas Electric Fire Monitoring System project. Keywords: fire detectors; electrical fires; archives; large public places 0, foreword In the past 10 years, the number of electrical fires in China has topped the total number of fire accidents. According to the statistics of the Fire Department of the Ministry of Public Security, there were 159,000 fires in 2007 (not including forests, grasslands, and underground fires in mines, the same below). From the direct cause of fires, electrical fires are the most common. Since then, it has accounted for 28.8% of the total. In 2008, there were 133,000 fires. Electrical causes such as electrical short circuits, overloads, and electrical equipment breakdowns caused 40,000 fires, accounting for 30.1% of the total. The proportion increased by 1.3 percentage points from 2007. The proportion of electrical fire accidents has increased year by year, which is worrying. For the severe electrical fire situation, early forecasting, early warning, and forecasting are the top priorities for firefighting, and eliminating the occurrence of electrical fires at the source has become the focus of attention. The task of preventing and effectively curbing electrical fires is imminent. Relevant state departments have successively formulated or revised relevant standards and specifications and required the installation of electrical fire monitoring and alarm systems in buildings. Based on the new standard of electrical fire monitoring system (GB14827-2005) and the Leakage Fire Monitoring System of Dezhou Archives as an example, this paper introduces the application of Acrel-6000/B electrical fire monitoring system in archives and large public places. 1. Project Introduction Dezhou City Archives (Bureau) is a business unit of the Dezhou City People's Government working department, which manages the city’s important archives, and is responsible for receiving, soliciting, organizing, and keeping municipal party committees, municipal governments, and municipal direct government departments, mass organizations, and enterprises and institutions. Important file information and important historical archives, history files, and historical archives of Texas . This project mainly builds new power supply circuits for the three power distribution areas of Donghang Kunming New Airport sewage treatment station, air food area, and power center for Dezhou City Archives and Dezhou City Construction Archives. This is due to electrical leakage and leakage due to electrical leakage that may cause fire forecasting and monitoring. Accurately monitor the faults and abnormal conditions of electrical circuits, discover the fire hazards of electrical fires, and promptly alert personnel to eliminate these hidden dangers. Help the airport save labor costs and improve work efficiency. The system detects the leakage current, over-current, and over-temperature signals of each power circuit in the site and has audible and visual alarming to accurately alert the staff of the location of the line fault and monitor the change of the fault point. Store various faults and operation test signals, and display the system power status to effectively prevent common electrical fire accidents caused by electrical leakage and ensure the safety of people's lives and property. 2, reference standards The system complies with the People's Republic of China national standard GB14287.1-2005 "Electrical fire monitoring system Part 1: Electrical fire monitoring equipment." 3, the basic composition and working principle of the system 3.1 The basic components According to the national standard GB14287-2005 "Electrical Fire Monitoring System" and the related specification "Design Method of Electrical Fire Monitoring System", the basic composition of the electrical fire monitoring system shall include: electrical fire monitoring equipment, residual current electrical fire monitoring detectors and testing Temperature-type electrical fire monitoring detectors and other three basic product categories. Among them, the residual current type electric fire monitoring detector is again composed of a monitoring detector and a residual current transformer (a pair of plug-in type and a closed type); the temperature-type electric fire monitoring detector consists of a monitoring detector and a temperature measuring sensor. Made up of. The residual current type electric fire monitoring system adopts a hierarchical distributed structure and is composed of a station control layer, a network communication layer, and a field device layer. As the system topology shown in FIG: Each electric fire detectors by shielded twisted pair RS485 interface with MODBUS communication protocol bus communication server connected to the access, and the access control host through five lines TCP / TP protocol. 1 ) The field device layer is mainly used for leakage current and temperature signal acquisition and measurement of various types of leakage fire detectors in the connection network, and it is also a necessary basic element for constructing the monitoring system. Not only shoulder the burden of collecting data, but also the terminal component that executes background control commands. 　 2 ) The communication control layer is mainly composed of a protocol interface converter and a bus network. This layer is the bridge for data information exchange. Different interface conversion devices provide various interfaces such as RS232, RS422, RS485, SPABUS, and Ethernet, flexible networking methods, support for point-to-point communication, fieldbus networks, Ethernet, and other types. The configuration network. The protocol interface converter is mainly used to directly relay on-site leakage fire detector tables to various control commands of the host computer, and is responsible for collecting, classifying, and storing the data information returned by the leakage fire detectors , such as temperature / residual current, etc. . 　 3 ) Management monitoring and control layer is for the fire control management personnel . This layer directly faces the user. This layer is also the uppermost part of the system, mainly by the electrical fire monitoring system software and the necessary hardware equipment such as man-machine interface, printers, UPS and so on. The software part has a good human-computer interaction interface. It reads the various data information collected by the front-end machine through the data transmission protocol, and is automatically calculated and processed to reflect the operating status of the site by means of graphics, digital display, and sound. Accept the operation command of the management personnel, send and check the execution status of the operation in real time to ensure the normal operation of the power supply unit. 3.2 Working principle The basic principle is that when the current, temperature and other parameters in the electrical equipment are abnormal or abrupt, the terminal probe (such as the residual current transformer, temperature sensor, etc.) uses the electromagnetic field induction principle and the temperature effect to collect the information. And sent to the monitoring probe, after amplification, A / D conversion, CPU analysis and judgment of the change in amplitude, and compared with the alarm set value, once the set value is exceeded, an alarm signal is sent, and also sent to The monitoring equipment is further identified and judged by the monitoring equipment. When it is confirmed that a fire may occur, the monitoring host issues a fire alarm signal, turns on the alarm indicator, sounds the alarm, and displays the fire alarm and other information on the LCD. The on-duty personnel will promptly go to the scene of the accident according to the above information, and send the alarm information to the fire control room . 3.3 Design, Installation and Cabling Design of Monitoring System The alarm signals of the electrical fire monitoring equipment and system shall be located in the fire control room or the place where the personnel is on duty. The power supply of the host should be taken from the fire control power supply (AC220V) of the control center. Each monitoring detector uses field power, and the power access point should be at the upper end of the circuit breaker. 1) Installation design of the interior of the distribution cabinet This project is a new construction project. All monitoring detectors are installed in the floor distribution box. They are mounted on rails and installed on the inner rails of the distribution cabinet. The staff can check the leakage and temperature information of each circuit through the panel button. Residual current transformers shall be installed on the three-phase power lines A and B, C and N lines. The PE line shall not pass through the transformer and shall be firmly fixed. The connection between the detector and the transformer shall be shielded wire; the temperature sensor shall be A thermistor, NTC, provides a temperature reference of -10 to 120°C. The thermistor can be connected to an electrical leakage fire monitoring detector via a wire. 2 ) Installation design of the whole leakage fire monitoring system Each leakage monitoring detector in the site has a 485 communication interface, and all the detectors on the site must be connected in series by means of a shielded twisted pair. When connecting, note that the number of connections per 485 bus does not exceed 32, and It is suitable for about 20. When installing the wiring, attention should be paid to the separation of strong and weak wires. The recommended wire diameter of the flame-retardant shielded twisted pair cable should be no less than 1.0 mm2 . The shielded wire shield layer should be well grounded, and each bus end should be increased by about 100 ohms. Matching resistance. Neat wiring, bundled into bundles, threading available flame retardant PVC pipe, metal pipe and metal trunking. After the pipe and slot are worn, the nozzle and slot shall be plugged. 3.4 Product Selection and Introduction The project mainly consists of a five-story building, basement and roof, and the duty room is located in the first floor fire control center. This project installs the ARCM300-J1 residual current monitoring detector and AKH-0.66/L residual in the distribution cabinet. Current Transformer. The Acrel-6000/B50, a bench-top electrical fire monitoring system, was set up in the Fire Control Center to share the leakage and temperature information in various locations for the unified management of the staff of the archives. ARCM300 series electrical fire monitoring detectors are intelligent detector products that comply with GB 14287-2005. The product can be used on a large number of online or stand-alone use (with leakage/overcurrent/temperature detection and alarm functions, and optional features: automatic shutdown of the monitored circuit during an alarm, ie relay output function). It integrates the functions of electrical fire monitoring and alarming. It has the features of high intelligence, complete functions, reliable performance, mini design, beautiful appearance, simple setting, and rail -mounted installation. It is a crystallization of a refreshing new idea design and is another new contribution to preventing electrical fire accidents. Electrical fire monitoring detectors (hereinafter referred to as "monitoring detectors") consist of residual current transformers, temperature sensors, and monitoring alarms. When the remaining current transformers in the protected line (hereinafter referred to as "transformer") detect the remaining When the current exceeds the preset value of the monitoring alarm or the temperature detected by the temperature sensor exceeds the preset value, the monitoring alarm device will issue an audible and visual alarm signal and a control signal after analysis and confirmation. The monitoring alarm can display the leakage current of the alarm circuit, sensor temperature and so on. When the monitoring alarm has alarm information, start the relay. It can directly display the detection current value and temperature value, without occupying a large equipment site, saving the cost of fire-fighting equipment, saving electricity and energy, and the monitoring detector adopts the instrument installation method. Acrel-6000 series monitoring equipment is the top of the whole electrical fire monitoring system. It can connect multiple ARCM series detectors to form a complete set of electrical fire monitoring system with sound and light alarm function. It also displays alarm loops synchronously and its alarm information. Can save more than 12 months, backup uninterruptible power supply can ensure that the city power loss after continuous operation for more than 4 hours, the monitoring system is divided into wall-mounted, piano desktop and cabinet type 3, effective communication distance up to 1200 meters, multiple devices Equipment or other systems such as alarm and fire linkage systems, power monitoring systems, etc. can exchange data. And this series of monitoring equipment with self-test function, from the hardware, software, communication lines, power supply system in all aspects of self-test, in order to keep abreast of the system product running status, to ensure the reliability of the system operation. 3.5 Software Interface This set of PC software Acrel- 6 000 electrical fire system. Mainly has the following function characteristic: The friendly man-machine contact surface, may gather the scene equipment the surplus electric current data and the temperature in real time and the time regularly, and has the warning prompt sound and light warning and so on the function. The customer can set the alarm temperature value and leakage current value according to actual needs. When the alarm fault is removed, it can be reset remotely. The system can record alarm events, dates, alarm values, over-line values, and generate reports. 1) Data Acquisition and Display The on-site leakage fire monitoring detector uploads the collected data to this interface. The user can modify the name of the circuit, monitoring location, and monitoring area as required. When the actual measured value of the residual current is greater than the alarm setting, the system alarm status indicator will automatically flash, and the status of the alarm unit in the corresponding interface will change in color, facilitating the operator to check and handle the alarm. 2) Fault display When the monitoring device detects a device fault, the status color of the fault unit on the monitoring main interface is changed, the specific information of the faulty unit is displayed, and a fault alarm sound is issued. Supports manual cancellation of fault alarms. 3) Parameter setting The interface displays the operability button, which can remotely modify the upper limit of the leakage current alarm value and reset the ARCM300-J1 and ARCM300-J8 instruments. Picture (7) As shown in figure (7), the interface shows the working status of the ARCM300-J1 and ARCM300-J8. When the instrument communication is abnormal, the alarm light starts flashing. When the instrument communication is normal, it does not flicker. As shown in the above figure, the system interface records the name of the alarm loop, alarm time, alarm type, alarm real-time value and set value. 4 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 potential safety hazards in time. It is of great significance to prevent fires from occurring. Since the system was put into operation in Texas Archives , the system has discovered and rectified many hidden dangers, greatly improved the work efficiency of the staff, ensured the stable and orderly conduct of the daily work of the archives, and provided the fire management for the archives. The basis of science. references [1]. Wu Enyuan Zhou Zhong Design and application of electrical fire monitoring system 2012. 8 Characteristics of carrier: use electric carrier to reduce the damage of transported goods and improve the transportation efficiency of products. The utilization rate of stacking space in transportation can be improved by using all electric carrier. Reduce labor intensity and improve working conditions. Good mobility and diversified working performance, reduce other loading and unloading equipment and reduce the investment of the whole handling facilities. Electric Handling Tool Cart,Electric Hand Truck Dolly,Electric Hand Carts,Electric Hand Dolly Jiangsu Anli Electric Vehicle Co. Ltd , https://www.anlitractor.com
