Through the introduction of Zouping and Runjiayuan project, this paper focuses on the functions and significance of the Acrel-6000 electrical fire monitoring system.
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Manufacturing process:
Yang Junjun
Ankerui Electric Co., Ltd. Shanghai Jiading
1 Introduction
Zouping and Runjiayuan are residential projects, located in the core area of ​​Shannan District, Zouping County, Binzhou City, Zuoyiyue River Landscape Belt, Youyi Quanqi Road, backed by Huangshan Mountain, north of Baimi South Water North Office Building, south of the National Fitness Center, The municipal core occupies multiple resources such as Zouping's government affairs, business, commerce, landscape, and humanities. The building area is about 110,000 m2. An Acrel6000 electrical fire monitoring system is now installed for the community distribution room.
2. System requirements analysis
This project is a living quarter. If a distribution line leaks electricity, the relevant personnel cannot find it in time. The Acrel6000 electrical fire monitoring system should be able to accurately monitor the faults and abnormal conditions of electrical circuits, identify fire hazards of electrical fires, and promptly alert the relevant personnel to eliminate these hidden dangers and prevent electrical fires.
3. Reference standard
This system complies with the National Standard of the People's Republic of China GB14287.1-2005 "Electrical Fire Monitoring System Part 1: Electrical Fire Monitoring Equipment".
4. System structure
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 parameter in the field protection circuit exceeds the alarm set value, it can send out alarm signals and control signals, can indicate the alarm part and save the alarm. information.
Zouping and Runjiayuan Power Distribution Room have 31 ARCM200L-J8 electrical fire detectors, 9 ARCM200BL-J4 electrical fire detectors and 5 ARCM200BL-J1 electrical fire detectors, all installed on the power distribution cabinet, as shown below: 
The on-site electrical fire detector is connected to the Acrel-6000 wall-mounted electrical fire monitoring system via two 485 buses. The system has the advantages of convenient installation and transportation, high cost performance and convenient maintenance.
The main equipment of the Acrel-6000 electrical fire monitoring system is as follows:
1 Main control unit: industrial grade tablet with touch screen, WinCE operating system
2 Input and output: Built-in company developed intelligent DCMOD module with multiple input and output
3 sound and light alarm: built-in speaker, LED indicator
4 Backup power supply: 2 sections 12V/7.2Ah maintenance-free battery
Host panel component layout and function description
1: Alarm indicator (red): When the device receives the alarm signal from the detector, the alarm indicator is always on.
2: Fault indicator (yellow): When the system fails (such as communication failure, power failure, etc.), the fault indicator is always on.
3: Running indicator (green): When the device is running normally, the indicator light is always on.
4: Main power indicator (green): When the main power is normal, the monitoring device is powered by the main power supply. At this time, the main power indicator is always on.
5: Standby power indicator (green): When the main power supply is under voltage or fault, the monitoring equipment is powered by the backup power supply, and the standby power indicator is always on.
The distribution of this system uses a computer distributed network structure:
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 industrial-grade tablet computers, micro-printers, UPS power supplies. The monitoring system software has a good human-computer interaction interface, 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.
Printer: System call prints or automatically prints graphics, reports, alarm logs, and more.
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 main unit of the electrical fire monitoring system is set in the duty room of the power distribution room.
2) Network communication layer
Communication medium: The system mainly uses shielded twisted pair cable to connect to the fire control room monitoring host by RS485 bus to realize real-time communication between field device and host computer. The communication line is laid along the weak bridge to ensure the quality of the communication.
3) Field device layer
The field device layer is a data acquisition terminal, mainly for the ARCM200 electrical fire detector and the AKH-0.66L series leakage current transformer (as shown in the figure below). ARCM200 can monitor 1/4/8 leakage current, each channel has disconnection and short circuit detection function; with event storage function, the alarm can record the time, type and parameter of alarm occurrence, and can analyze the electricity consumption of the site according to the alarm record. The situation provides a basis for eliminating the fault; using the fieldbus communication technology, the upper computer management software can monitor the operation of the scene at all times and timely discover the alarm information. The standard MODBUS protocol can be connected to a variety of standard systems; high integration, networked, and highly intelligent.
5. System function
This set of PC software Acrel-6000 electrical fire system. Mainly has the following features: friendly human-machine interface, real-time and time-consuming collection of residual current data of field devices, and alarm prompt sound and light alarm and other functions. The customer can set the leakage current alarm value according to actual needs. When the alarm fault is released, it can be reset remotely. The system can record alarm events, dates, alarm values, and crossing values, and generate reports to print alarm event records.
1) Monitoring main interface 
The data collected by the on-site ARCM300 electrical fire detector is uploaded to this interface. The customer can modify the circuit name as needed. The real-time value of the residual current of the corresponding cabinet can be displayed in the square, and the data can be updated periodically. When the measured value of residual current is greater than the alarm setting, the system alarm status indicator will flash automatically. The alarm prompt scroll bar at the lower end of the interface will automatically prompt the alarm circuit name to facilitate the operation personnel to check and handle the fault.
2) Detector communication failure information prompt interface 
This interface mainly realizes the remote adjustment function. The operation personnel can query the residual current over-the-counter alarm value of the corresponding loop in the parameter setting report, and set the residual current over-the-counter alarm value according to the actual needs of the site. At the same time, the alarm instrument can be remotely reset. When the fault alarm is released, press the reset button to perform remote reset, which is convenient for users.
3) Event record query interface 
With event storage function, the alarm can record the time, type, parameter and alarm value of the alarm. According to the alarm record, the fault can be analyzed to provide a basis for eliminating the fault; and the alarm record can be printed.
6. Conclusion
With the development of intelligent buildings and the widespread use of electricity, people's awareness of safety is becoming higher and higher. Installation of leakage fire system in public buildings is an inevitable trend of intelligent construction. The electrical fire system is conducive to the detection of potential safety hazards, timely handling of safety hazards, and the importance of fire prevention and precaution. Since the system was put into operation, many hidden dangers have been discovered and rectified, which provided a scientific basis for the fire management of the project and was well received by customers.
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 at Ankelui Electric Co., Ltd. Tel, mobile, QQ
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
1). Dry process:By dry process, can produce isotropic & anisotropic magnets. The tool can be changed and developed easily.
2). Wet process:By wet process, only anisotropic magnets can be produced. It is complicated to change the tool and the tooling charge is much higher.
Magnetization:
1). Isotropic ferrite magnets are not oriented and can be magnetized in any direction.
2). Anisotropic ferrite magnets are different, they are all oriented in the manufacturing direction, and should be magnetized in the direction of orientation.
Ferrite Magnet,Sintered Ferrite Magnet,Ferrite Round Magnet,Hard Ferrite Magnet
Chongqing Great Well Magnet Co.,ltd. , https://www.gwmagnet.com