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 Wuzhong Road No. 51 project, the realization of the function of electric fire monitoring system and its significance are expounded.
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Yang Junjun An Kerui Electric Co., Ltd. Shanghai Jiading
0 Overview
No. 51 Wuzhong Road is located at No. 51 Wuzhong Road, Xuhui District, Shanghai. This project is 168 ARCM200 series instruments on the floor of No. 51 Wuzhong Road, distributed in two 14-storey buildings. This project is mainly responsible for monitoring the leakage status of the distribution line distributed on the floor distribution box, and promptly reminding the duty room of the control room to prevent the occurrence of electrical fires.
On the site of No. 51 Wuzhong Road, there are residual current meter 168 ARCM200 installed in the floor distribution box. The field instrument is connected to the Acrel-6000/Q piano 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. 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)
2 system components
The electrical fire project of No. 51 Wuzhong Road consists of an electrical fire monitoring background, an electrical fire detector and a leakage current transformer.
The communication bus of this project has access to 5 communication buses. After the bus is connected hand-in-hand in the floor distribution box, the bus is connected to the background of the piano 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 ARCM200 series residual electrical fire monitoring detector.
The system structure topology is as follows: 
3 electrical fire equipment
3.1, Acrel-6000/Q electrical fire monitoring background: 
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