Application of Acrel-6000 Electrical Fire Monitoring System in Changlong Residence

Ankerui residual current electrical fire monitoring system through ARCM residual current electrical fire monitoring device, this paper through the introduction of the Changlong residential supporting electrical fire monitoring system project, focusing on the Acrel-6000 electrical fire monitoring system in commercial real estate projects The functions that are implemented and their significance.
Yang Junjun

Ankerui Electric Co., Ltd. Shanghai Jiading




0, preface

In the past 10 years, the number of electrical fires in China has been the highest in the total number of fire accidents. According to the fire data of the Fire Department of the Ministry of Public Security, there were 159,000 fires in 2007 (excluding forests, grasslands, military, underground underground fires, the same below). From the direct cause of the fire, the electrical fire caused the most, a total of 45,703. Since 2008, a total of 28.3 million fires occurred. In 2008, a total of 133,000 fires occurred. Electrical causes such as short-circuit, overload, and electrical equipment failures caused 40,000 fires, accounting for 30.1% of the total, and the proportion increased by 1.3 percentage points over 2007. The proportion of electrical fire accidents has increased year by year, which is worrying. For the severe electrical fire situation, early prediction, early warning, and forecasting have become the top priority of fire protection work, and the occurrence of electrical fires at the source has become the focus of attention. The task of preventing and effectively curbing electrical fires is imminent. Relevant experts actively called for effective technical preventive measures to curb the rising trend of electrical fires as soon as possible. The relevant government departments also attached great importance to it. They have formulated or revised relevant standards and regulations, and required to set up a leakage fire alarm system in the building.

To prevent building electrical fires, the national standards and specifications for setting up leakage fire alarm systems are basically complete (and other relevant specifications are being submitted for approval), and more and more leaky fire alarm systems will be designed and applied in the future. This paper introduces the application of the Acrel-6000 electrical fire monitoring system in commercial buildings and large public places based on the new standard of electrical fire monitoring system (GB14827-2005) and the monitoring system of leakage electric fire in Changlong residential.

1. Project introduction

The project is invested and constructed by Zhuhai Changlong Investment Development Co., Ltd., a subsidiary of Guangzhou Changlong Group. Zhuhai Chimelong International Marine Resort is positioned as an international leader with unique theme and ecological priority. It is based in Guangdong, Hong Kong and Macao, facing the whole country and going global. The project planning and design is divided into three groups: Fuxiang Bay, Hengqin Mountain and Dolphin Bay. The whole project will be constructed in two phases. The first phase of the main construction area will be organized in Fuxiang Bay; the second phase will be the Hengqin Mountain Group. And the Dolphin Bay group. The total investment of the project is over 20 billion yuan, and the first phase investment is 10 billion yuan. The project draws on the internationally successful composite tourism industry model. The Changlong project is centered on six theme parks, and is a combination of theme parks, luxury hotels, business exhibitions, tourism and shopping, sports and leisure, and living and living. A world-class integrated tourism and holiday project. The Changlong residential package is used for the project staff's residence (project matching).

This paper mainly predicts and monitors the distribution circuit in the distribution box of the 1# and 2# floor of Zhuhai Changlong Residential Building due to leakage and fire caused by leakage, accurately monitors the fault and abnormal state of the electric line, and finds the fire of electrical fire. Hidden dangers, timely alarms to remind people to eliminate these hidden dangers. Help the airport to save labor costs and improve work efficiency.

The system detects the leakage current and overcurrent of each power circuit in the field, and promptly reminds the staff of the location of the line fault in the way of sound and light alarm, and monitors the change of the fault point. Store various faults and operation test signals, and display the system power status to effectively prevent common electrical fire accidents caused by electric leakage and ensure the safety of people's lives and property.

2 system design and function

2.1, system structure

The residual current type electrical fire monitoring system adopts a layered distributed structure, which is composed of a station control layer, a network communication layer and a field device layer. The system topology diagram is shown in the following figure: Each electrical fire monitoring detector is directly connected to the monitoring host through the shielded twisted pair RS485 interface and using the MODBUS communication protocol bus type.



Figure 1 system topology

1) The field device layer is mainly used to connect various types of instruments and protection devices for leakage and temperature signal acquisition and measurement in the network, and is also a necessary basic component for constructing the monitoring system. Not only shoulders the burden of collecting data, but also the terminal component that executes background control commands.

2) The communication control layer is mainly composed of a communication server, an interface conversion device, and a bus network. This layer is a bridge for data information exchange. Different interface conversion devices provide various interfaces such as RS232, RS422, RS485, and Ethernet. The networking mode is flexible, and supports peer-to-peer communication, fieldbus network, Ethernet, and other types of groups. State network. The communication server is mainly used to directly transfer various control commands of the host computer to the on-site instrument and meter, and is responsible for collecting, classifying and storing the data information returned by the field instrumentation.

3) The management measurement and control layer is for the management of the monitoring network. This layer is directly facing the user. This layer is also the uppermost part of the system, mainly consisting of electrical fire monitoring system software and necessary hardware equipment such as computers, man-machine interfaces, printers, UPS, etc. The software part has a good human-computer interaction interface, and reads various kinds of data information collected by the front-end machine through the data transmission protocol, and automatically performs calculation and processing, and reflects the operation state of the scene by means of graphics, digital display, sound, etc., and Accept the operation command of the manager, send and detect the execution status of the operation in real time to ensure the normal operation of the power supply unit.

2.2, working principle

The basic principle is that when the current, temperature and other parameters in the electrical equipment are abnormal or abrupt, the terminal probe (such as residual current transformer, temperature sensor, etc.) uses the electromagnetic field induction principle and the temperature effect to collect the information. And transported to the monitoring detector, and compared with the alarm set value, once the set value is exceeded, an alarm signal is sent, and is also sent to the monitoring device, and then further identified and determined by the monitoring device, when it is confirmed that a fire may occur When the monitoring host sends out a fire alarm signal, the alarm indicator light is illuminated, an alarm sound is emitted, and a fire alarm and the like are displayed on the liquid crystal display. On the basis of the information displayed above, the on-duty personnel quickly go to the scene of the accident to check and process the alarm information to the centralized console.

2.3, system networking design

There are 2 buildings in 1# and 2# in total, and there are a total of 107 distribution boxes. According to the relevant provisions of “Building Electrical Fire Prevention Requirements and Test Methods”, the requirements are “in order to prevent electrical equipment and line leakage fires, The terminal sets the residual current action protector that automatically cuts off the power or alarm." Therefore, in this project, the leakage fire detector ARCM300-J1 and the residual current transformer AKH-0.66L are installed at the incoming line of each distribution box, and the wall-mounted electrical fire monitoring system Acrel-6000/B is set up in the 2# building. The electrical fire monitoring systems of each building are geographically distributed in two buildings. Each building forms an organic whole through the 485 bus network, sharing the leakage and temperature information everywhere, facilitating the unified management of the staff.

2.4, software interface

This set of PC software Acrel-6000 electrical fire system. Mainly has the following features: friendly human-machine interface, real-time and timed collection of residual current data and temperature of field devices, and alarm prompt sound and light alarm and other functions. The customer can set the alarm temperature value and leakage current value according to actual needs. When the alarm fault is released, the alarm can be reset remotely. The system can record alarm events, dates, alarm values, and crossing values, and generate reports.

2.4.1 Main interface of software operation

The main interface of the system displays the status of the current device, including operation, fault, alarm, and power status. In normal operation, faults and alarm indications are not displayed; when faults are detected and alarms occur, faults and alarm indications are displayed; after faults and alarms are eliminated, faults and alarm indications are automatically hidden; in the power status bar, the display is currently the master Power supply or backup power supply.

The interface displays the current alarm and fault information of the system in real time. The information includes: the time of occurrence, the number of the alarm, the fault detector (or module), the area and location where the detector is located, the alarm, and the type of fault.



Figure 2 system main interface

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