Application of Acrel-6000 Benchtop Electric Fire Monitoring System in Jiading District

Anke Rui Qiu Hong

Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Jiangyin, Jiangsu 214405

Abstract: This article 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 application. Finally, through the example of the Ankerui residual current type electrical fire monitoring system in the Huiyuan Kaiyuan Project of the Juyuan West Block in Jiading District, the realization of the function of the electrical fire monitoring system and its important significance are described.

Keywords :electrical fire; monitoring system; Acrel-6000/Q; HSBC Kaiyuan;

0 Overview

HSBC Kaiyuan is located in the West Block of Juyuan, Jiading District, Shanghai, with a construction area of ​​286,042 square meters. The project consists of 44 ARCM200 series instruments on the Kaiyuan floor of HSBC, distributed in a 17-storey building. This project is mainly responsible for monitoring the leakage status of the site distributed on the outlet of the distribution box, and promptly reminding the duty control staff of the control room to prevent the occurrence of electrical fire.

On the site of HSBC Kaiyuan, there are 44 ARCM200 residual current meters installed in the floor distribution box. The field instrumentation is connected to the Acrel-6000/Q benchtop electrical fire monitoring system in bus mode.

1 Reference standard

    In recent years, the state has successively formulated or revised a number of relevant standards and regulations to strengthen the prevention of electrical fires in order to increase the prevention of electrical fire monitoring. There are:

1.1. GB50045-95 (2005 edition) " High-rise Civil Building Design Fire Protection Code ", which provisions in the provisions of 9.5.1: high-rise buildings in the fire risk, personnel intensive and other places should be set up a leakage fire alarm system.

1.2. GB50016-2006 “Specifications for Fire Protection in Building Design” states in Clause 11.2.7 that the following places should be equipped with residual current action electrical fire monitoring systems. These venues include various types of theaters , halls, warehouses , residential quarters , hospitals , shops , schools, and so on.

1.3. The relevant provisions of the national standard “Building Electrical Fire Prevention Requirements and Testing Methods” also explicitly require that “the residual current protection device that automatically cuts off the power supply or alarm should be installed at the power supply inlet”.

1.4. Electrical fire monitoring system products should meet: GB14287.1-2005 "Electrical fire monitoring equipment", GB14287.2-2005 "residual current electrical fire monitoring detector", GB14287.3-2005 "temperature-type electrical fire monitoring and detection Device

1.5. The installation and operation of electrical fire monitoring system shall meet GB13955-2005 "Installation and Operation of Residual Current Operation Protection Device"

1.6. The power supply of the electrical fire monitoring system shall meet the requirements of GB50052 "Design Specification for Power Supply and Distribution System"

1.7. The design of electrical fire monitoring system should meet the requirements of "Design Method for Electrical Fire Monitoring System" (Interim Provisions)

2 system components

HSBC Kaiyuan Electric Fire Project consists of electrical fire monitoring background, electrical fire detectors and leakage current transformers.

A total of 2 communication buses are connected to the project's communication bus. After the buses are handed in series on the floor distribution box, they are connected to the backstage of the desk to form the major artery of the electrical fire system. The leakage current transformer in the box is connected to the leakage detector through the current line, and the leakage detector shows leakage in real time. The above constitutes a set of stable and reliable electrical fire monitoring systems. The system network is divided into three layers:

1) Station control management

Station management The management personnel of the electrical fire monitoring system are the direct windows of human-computer interaction and the top part of the system. Mainly by the system software and necessary hardware devices, such as touch screen, UPS power supply and other components. The monitoring system software calculates, analyzes, and processes various types of data on the site, and responds to the on-site operations by means of graphics, digital display, sound, and indicator lights.

Monitoring host: used for data acquisition, processing and data forwarding. Provides data interfaces within or outside the system for system management, maintenance, and analysis.

UPS: Ensure the normal power supply of the computer monitoring system. When the power supply problem occurs in the entire system, ensure the normal operation of the station control and management equipment.

The background monitoring equipment is set in the control room.
2) Network communication layer

Communication medium: The system mainly adopts shielded twisted pair, uses RS485 interface, MODBUS communication protocol to achieve real-time communication between the field device and the host computer.

3) Field device layer

The field device layer is a data acquisition terminal, mainly ARCM200 series of residual electrical fire monitoring detectors.

The system topology is as follows:

3 , electrical fire equipment

3.1 , Acrel-6000 /Q Electrical Fire Monitoring Background:

The main technical parameters

power supply:

1 rated working voltage AC220V (-15% ~ +10%)

2 Standby power supply: When the main power supply is undervoltage or power failure, maintain the monitoring equipment working time ≥1 hour

Work system:

24-hour work

communication method:

RS485 bus communication, Modbus-RTU communication protocol, transmission distance 1km, can extend communication transmission distance through repeater

Monitoring capacity:

1 Monitoring equipment can monitor up to 1024 monitoring units (detectors)

2 can be connected with ARCM series monitoring detector

Monitoring alarm items:

1 Residual current fault (leakage): Fault cell attributes (part, type)

2 Temperature alarm (over temperature): Fault cell attributes (part, type)

3 Current fault (overcurrent): Fault cell attributes (part, type)

Monitoring alarm response time: ≤30s

Monitoring alarm sound pressure level (A weighting): ≥70dB/1m

Monitoring alarm light display: red LED indicator, red light alarm signal should be maintained until manual reset

Monitoring alarm sound signal: Can be eliminated manually, when it is alarm signal input again, it can start again

Fault alarm item:

1 An open circuit or short circuit occurred in the communication cable between the monitoring equipment and the detector

2 Monitoring equipment main power supply undervoltage or power failure

3 An open circuit or short circuit occurred in the connection between the battery charger and the battery

Fault alarm response time: ≤100s

Monitoring alarm sound pressure level (A weighting): ≥70dB/1m

Monitoring alarm light display: yellow LED indicator, yellow light alarm signal should be maintained until troubleshooting

Fault alarm sound signal: Can be eliminated manually, when it is alarm signal input again, it can start again

During faults, normal operation of non-failed circuits is not affected

Control output:

Alarm control output: 1 set of normally open passive contacts, capacity: AC250V 3A or DC30V 3A

Self-inspection project:

1 Indicator Check: Alarm, Fault, Operation, Main Power, Standby Power Indicator

2 display check

3 audio device inspection

Self-check time ≤60s

record:

1 Record content: record type, occurrence time, detector number, area, fault description, no less than 20,000 records can be stored

2 record query: according to the record of the date, type and other conditions

Operation rating:

1 daily shift: real-time status monitoring, event record query

2 monitoring operation level: real-time status monitoring, event record query, remote reset of the detector, device self-test

3 System management level: real-time status monitoring, event record query, remote reset of detector, device self-check, system parameter query of monitoring equipment, individual detection of each module of monitoring equipment, operator addition and deletion

Use environmental conditions:

1 Workplace: fire control room, manned power distribution (distribution room), on-call room walls

2 working environment temperature: 0 °C ~ 40 °C

3 working environment relative humidity: 5% to 95% RH

4 Altitude: ≤2500m

3.2, ARCM200 series instruments

The ARCM200 residual current type electric fire monitoring detector is designed for TT and TN systems below 0.4kV. It monitors and manages the fire hazard parameters such as residual current, wire temperature, overcurrent, and overvoltage in the distribution circuit. This prevents the occurrence of electrical fires and enables real-time monitoring of multiple power parameters to provide accurate data for energy management. Products using advanced microcontroller technology, high integration, compact size, easy installation, set intelligent, digital, network in one, is the building electrical fire prevention and control, system insulation, such as the estimated aging of the ideal choice. The product complies with the standard requirements of GB14287.2-2005 "Electrical fire monitoring system Part 2: Residual current electrical fire monitoring detector".

4 system function

4.1. Monitoring alarm function:

The monitoring equipment can receive the leakage and temperature information of multiple detectors. When the alarm sounds, an audible and visual alarm signal is emitted. At the same time, the red “alarm” indicator light on the equipment is on. The display indicates the alarm location and the type of alarm. The alarm time is recorded and the sound and light alarm is maintained. , until the display reset button remote reset the detector. The audible alarm signal can also be manually cancelled using the display “Mute” button.

4.2. Fault alarm function

Communication failure alarm: When a communication failure occurs between the monitoring device and any connected detector, the corresponding detector in the monitoring screen displays a fault prompt, and the yellow “fault” indicator on the device lights up, and a fault alarm sound is emitted. .

Power failure alarm: When the main power supply or backup power supply fails, the monitoring device also emits an audible and visual alarm signal and displays the fault information. You can enter the corresponding interface to view the detailed information and cancel the alarm sound.

4.3. Self-check function

Check if all status indicators, display screens, and speakers in the device are normal.

4.4. Alarm record storage query function

When leakage, over temperature alarm, or communication or power failure occurs, the alarm location, fault information, alarm time, and other information are stored in the database. When the alarm is removed and the fault is eliminated, it is also recorded. Historical data provides a variety of convenient and fast methods for searching.

4.5. Power Function

When the main power supply has a power failure or undervoltage, the monitoring device can automatically switch to the standby power supply. When the main power supply resumes normal power supply, it automatically switches back to the main power supply, ensuring continuous and smooth operation of the monitoring device during the switchover process.

4.6. Detector Control Functions

By monitoring the software operation, remote reset control can be performed on all detectors connected to the device.

4.7. Authority Control Function

In order to ensure the safe operation of the monitoring system, the monitoring device software operating authority is divided into three levels, and different levels of operators have different operating rights.

5 Concluding remarks

HSBC Kaiyuan electrical fire monitoring system consists of electrical fire monitoring equipment Acrel-6000/Q, leakage fire detector leakage fire detector ARCM200. Acrel-6000 electrical fire monitoring system is an independent research and development by the company to receive the residual current electrical fire detectors and other field equipment signals to achieve the alarm, monitoring, control and management of the protected electrical circuit running on the computer's industrial level Hardware/software system. This system is used in fire control centers in large shopping malls, living quarters, production bases, office buildings, shopping malls and hotels. The system uses a standard Modbus field bus to connect detectors with communication functions. When the detected parameters in the field protection circuit exceed the alarm setting value, it can send alarm signals, control signals, can indicate alarm locations and save alarms. information. The field instrumentation is connected to the Acrel-6000/Q benchtop electrical fire monitoring system in bus mode. This system has the advantages of convenient installation and transportation, high cost performance, and easy maintenance.

references

[1]. Cheng cause any week. Electricity measuring digital instruments Principles and Applications Guide [M]. Beijing. China Electric Power Press. 2007.4

[2] .Zhou Zhong . Application of Electric Power Meters in Energy Metering of Large-scale Public Buildings [J]. Modern Building Electric 2010. 6

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