This paper introduces the functions and significance of the Acrel-6000 electrical fire monitoring system through the introduction of the Harbin Ford 4S shop electrical fire monitoring system project.
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
1 Introduction
Harbin Ford Motor 4S shop is now established: sales department, commercial department, wholesale department, marketing department, financial and credit department, after-sales service department, accessories department, customer relationship center, personnel training department, finance department, administrative department, etc. Become a formal management company. 4S shop specializes in selling Changan Ford series cars and Ford imported cars. At the same time, it owns Ford original auto parts management rights and maintenance center, providing one-stop service from the purchase of the car to the original factory warranty; repairing Ford major brand vehicles .
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 change of the fault point. Store various fault and operational test signals to display system power status.
3. 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. GB50045-95 (2005 edition) "Code for Fire Protection Design of High-rise Civil Buildings", which stipulates in Article 9.5.1 that a fire alarm system should be installed in places with high fire risk and dense personnel in high-rise buildings.
1.2. GB50016-2006 "Code for Fire Protection of Building Design", as specified in Article 11.2.7: The following places should be equipped with a 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 Electric Fire Monitoring Detector", GB14287.3-2005 "Measurement Temperature Electric Fire Monitoring and Detection" 》
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 device"
1.6. The power supply of the electrical fire monitoring system shall meet the requirements of GB50052 "Design Specifications for Power Supply and Distribution Systems"
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)
4. System composition
Harbin Ford Motor 4S shop electrical fire project consists of electrical fire monitoring equipment, electrical fire detectors and leakage current transformers.
The communication bus of this project is connected to two communication buses. After the bus is connected hand in hand in the power distribution room, it is connected to the wall-mounted background to form the aorta of the electrical fire system. 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 ARCM200L series of residual electrical fire monitoring detectors.
The system structure topology is as follows:
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5. Electrical fire equipment
5.1, Acrel-6000 electrical fire monitoring background:
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