Through the introduction of the student canteen project of Shandong Normal University, this paper focuses on the functions and significance of the Acrel-6000 electrical fire monitoring system. Diane Kerui Electric Co., Ltd. Shanghai Jiading Pull Down Kitchen Faucet,Sink Mixer Tap,Pull Down Faucet,Kitchen Pull Down Faucet kaiping aida sanitary ware technology co.,ltd , https://www.kpfaucets.com
Abstract Ankerui Residual Current Electric Fire Monitoring System conducts electrical fire monitoring on low-voltage distribution systems in shopping malls, hotels, airports, banks, hospitals, factories and Other buildings through ARCM residual current electrical fire monitoring devices or digital residual current transformers. . Through the introduction of the student canteen project of Shandong Normal University, this paper focuses on the functions and significance of the Acrel-6000 electrical fire monitoring system.
Keywords: electrical fire detector electrical fire monitoring system Shandong Normal University student canteen Ankerui
1 Introduction
The Changqing Campus of Shandong Normal University is located in the Jinan University Science and Technology Park. The first phase of the new campus (including the teaching building, information technology building, laboratory building, sports training hall, university student activity center, canteen, 15 student apartments) was completed in 2005. The building area is 310,000 square meters. In October 2005, the Changqing Campus was officially opened.
2. System requirements analysis
The canteen building has three floors and a large building area. 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.
There are 14 AKH-0.66/L digital residual current transformers at the student canteen project of Shandong Normal University, which are distributed in the strong electric rooms of the canteen. The on-site digital residual current transformer adopts the bus mode and connects to the Acrel-6000 wall-mounted electrical fire monitoring system through 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:
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, as shown in the following figure: 
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 1F duty 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 AKH-0.66/L series digital leakage current transformer (as shown in the figure below). AKH-0.66/L can monitor 1 channel leakage current; using fieldbus communication technology, the host computer management software can monitor the operation of the site 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 
On-site AKH-0.66/L series digital leakage current transformer acquisition data is uploaded to this interface, the customer can modify the circuit name as needed, and 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) Residual current transformer communication fault 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 systems in public buildings is an inevitable trend of intelligence. 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: 牟芸, female, Han nationality, undergraduate, engineer, the main research direction is intelligent building power supply and distribution monitoring system. Contact number: mobile phone, landline, QQ
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