0. Foreword With the rapid development of economy and science and technology, the population density of cities is continuously increasing, the electricity load is large, the distribution lines are many, and the situation is complicated. It is easy for a slight negligence to cause fires, endangering people's lives and property safety. The electrical fire monitoring system can warn users in the form of audible and visual alarms when the electrical circuit fails, and urgently repair the electrical circuit to avoid leakage fire. It is precisely because of the early warning function of the system that prevents troubles from being "burned", so that more lives and property safety are guaranteed.

1. Project Introduction

The project has a construction area of ​​about 290,000 square meters and covers an area of ​​998 acres. The main constructions include teaching buildings, graphic information comprehensive buildings, laboratory buildings, simulated ward buildings, clinical and nursing complex buildings, canteens, dormitories, college student activity centers, stadiums, etc. , Supporting the construction of auxiliary infrastructure such as drainage, electricity, heating, fire protection, gas engineering, greening, roads, parking lots, etc., which can accommodate 18,000 students to study and live in the school.

2. Introduction to field project application products
2.1 Acrel-6000 electrical fire monitoring system Acrel-6000 electrical fire monitoring system is used to receive residual current electrical fire monitoring detectors and other field equipment signals to realize the operation of alarm, monitoring, control and management of the protected electrical circuit Industrial-grade hardware/software systems for computers. This system is suitable for intelligent buildings, high-rise apartments, hotels, restaurants, commercial buildings, industrial and mining enterprises, national key fire-fighting units, and petrochemicals, culture, education and health, finance, telecommunications and other fields. Remote control and remote signaling facilitate monitoring and management.
Acrel-6000 electrical fire monitoring system consists of Acrel-6000 series monitoring equipment, ARCM-L series integrated monitoring detectors and supporting accessories. Each equipment of the system is connected by CAN bus and fire-fighting second bus (flame-retardant twisted-pair shielded wire), and the construction and wiring are simple and convenient.
2.2 Acrel-6000/B1 electrical fire monitoring equipment
2.2.1 Panel component layout and function description

2.2.2 Technical parameters

Parameters Model

Acrel-6000/B1

Input power

AC220V±15% 50Hz 250W

The output voltage

DC24V

Output current

10A

Maximum capacity

Two bus loop capacity 2*128=256 points

CAN bus loop capacity 2*16=32 area extensions

Bus communication method

Two bus, CAN bus

power cable

NH-BV-3×2.5mm2

Communication line

ZR-RVSP-2×2.5mm2

Communication distance

≤500m (can be extended)

Display function

8-inch touch panel computer with full Chinese display

Alarm method

Audible alarm

record

Storage ≥10000

Print function

Micro thermal printer

Operation classification

Set 4 operation levels, suitable for safe operation of different levels of staff

Backup capacity

Valve-regulated sealed lead-acid Battery, capacity 12V/12Ah, 2 sections

Dimensions

550*450*200 (H*W*D) mm

Ambient temperature

-10℃~+55℃

Relative humidity

≤95%RH

Altitude

＜2500m

Protection level

IP30

Installation method

Wall hanging

2.2.3 Internal terminal wiring diagram
1) The wiring terminals of the electrical fire monitoring system are placed in the main cabinet, and there are 14 single-row wiring terminals.

2) Function table of each terminal

Remarks:
The communication bus terminal is an external communication bus terminal;
The external communication bus must use shielded twisted pair;
The control output is 1 set of normally open passive contacts, capacity: AC220V 3A;
The linkage signal is an active signal, and the input voltage is DC24V.
note:
The protective ground terminal of the equipment should be properly grounded;
In order to ensure the communication quality, when laying two-bus cables, it is recommended to use a cable with a specification of ZR-RVSP-2×2.5mm2.
2.3 Overview of the area extension The area extension is the local control device of the electrical fire monitoring system, which can effectively monitor the detector devices in the local area, and its own status information can be uploaded to the monitoring host through the bus, which extends the communication distance of the monitor. Expanded the number of monitoring terminals.
2.3.1 Product features
1 Provide a stable and reliable DC24V safety voltage for system components in the area;
2 The anti-power supply is cancelled on the spot as the working power supply, which can flexibly construct a large-capacity electrical fire monitoring system;
3 Built-in backup power supply, automatic switching between main and backup power sources, effectively ensuring the reliable operation of the system;
4 Monitor the fault and alarm status of the integrated monitoring detector, and feed back to the electrical fire monitoring equipment.
2.3.2 Product parameters

2.3.3 Panel component layout and function description

2.3.4 Outline dimension and wiring terminal diagram

2.4 ARCM-L series integrated electrical fire monitoring detector

ARCM-L series integrated electrical fire monitoring detector appearance

2.4.1 Functions of ARCM-L series integrated electrical fire monitoring detectors:
? It can detect 1 channel of leakage current and 4 channels of temperature signals online, and each channel has the function of disconnection and short circuit detection;
?Using two-bus communication technology, the upper computer software can monitor the operating conditions of the scene at all times, and find the alarm information in time;
? High degree of integration, networking and intelligence.
? Suitable for 0.4KV voltage level TN-CS, TN-S and local TT systems.
2.4.2 Technical parameters

3. Matching table of other parts of electrical fire monitoring system
3.1 AKH-0.66L series residual current transformer
3.1.1 Product appearance

3.1.2 Transformer selection table

model

Applicable rated current In

Inner aperture φmm

Outer aperture φmm

Weight Kg

AKH-0.66L45

16～100A

45

76

0.18

AKH-0.66L80

100～250A

80

120

0.42

AKH-0.66L100

250～400A

100

140

0.50

AKH-0.66L150

400～800A

150

190

1.32

AKH-0.66L200

800～1500A

200

240

1.94

3.1.3 Temperature sensor

The temperature sensor is a thermistor NTC, which provides a temperature monitoring reference of 0℃～120℃, which can be used to monitor the temperature of cables or distribution boxes and provide temperature protection.

4 Field instrument distribution and networking
4.1 Site distribution Henan Shangqiu Medical College is equipped with an Acrel-6000/B1 electrical fire monitoring equipment (host), 5 AF-QYFJ area extensions (extensions) and 537 ARCM-L series integrated detectors.
The electrical fire monitoring equipment and extensions 1, 2, and 3 are located in the control room on the first floor of the school's administrative building. The remaining extensions 3 and 4 are at 12# and 14# respectively.
The two-bus loop 1 of the host computer is connected with 55 integrated detectors, and the two-bus loop 2 is connected with 20 integrated detectors.
The second bus loop 1 of extension 1 connects with 53 integrated detectors, and the second bus loop 2 connects with 38 integrated detectors.
The second bus loop 1 of extension 2 connects 58 integrated detectors, and the second bus loop 2 connects 36 integrated detectors.
The second bus loop 1 of extension 3 connects 36 integrated detectors, and the second bus loop 2 connects 40 integrated detectors.
The second bus loop 1 of extension 4 is connected to 53 integrated detectors, and the second bus loop 2 is connected to 25 integrated detectors.
The second bus loop 1 of extension 5 is connected to 53 integrated detectors, and the second bus loop 2 is connected to 43 integrated detectors.
4.2 Networking mode The host computer and the regional extension adopt CAN communication mode, and the material is ZR(NH)-RVVSP-2*1.5mm2. The extension and integrated monitoring detector adopt two-bus communication mode, and the material is ZR(NH)-RVVSP-2*2.5mm2.
4.3 System Network Diagram

Figure 3-1 System networking

5. Electrical fire monitoring system software operation interface

6. Equipment field application photos

Electrical fire monitoring host

Regional extension

Integrated electrical fire monitoring detector

7. On-site problems Installation problems: As part of the integrated electrical fire monitoring detectors are short-circuited with the ground wire, the status display on the electrical fire monitoring host sometimes causes the communication to be normal and sometimes the communication is interrupted, which is a line problem.

8. Concluding remarks The electrical fire monitoring system is an early warning system for electrical fires. When the line or equipment fails, it can detect the change of leakage current in time, and accurately give the early warning or alarm signal to kill the electrical fire in the bud. Start with prevention, always take precautions, safety is no small matter, and life is more important than a mountain.

references

[1]. Zhou Zhong. The application of electric meters in the electric energy sub-metering of large public buildings[J]. Modern Building Electric 2010. 6
[2]. Ankerui Electric Co., Ltd. Product Selection Manual. 2018.01
[3].GB50116-2014 Code for fire protection of building design[S].
[4]. GB14287-2014 Electrical fire monitoring system [S].

About the author You Xiaoyun, female, undergraduate Ankerui Electric Co., Ltd., whose main research direction is smart grid power supply and distribution

Small Solar Panel

Our Sunket also has a multi-busbar small module production line specializing in the production of small panels for more than ten years.

From 158.75mm 5BB to 182mm 10BB to 210mm 12BB, from 10W to 400W has been fully covered. In addition, our certificates are complete.

Smaller solar panels can be used in many different ways: as a phone charger, for RVs and during camping trips, and for small off-grid solar projects. If you're looking to save money by offsetting your home energy use with a Solar Power System, small panels likely won't get the job done.

Solar panels may be worth it for smaller roofs if you install a system that uses more efficient solar panels, such as monocrystalline solar panels, as they generate more power using less space. The ideal roof slope for solar panels is between 30 degrees and 45 degrees.

Small Solar Panel, Customized Solar Panel, Small Size Solar Panel, Small Size PV Module, Customized PV Module

Wuxi Sunket New Energy Technology Co.,Ltd , https://www.sunketsolar.com