In the power network, the distribution is the most common. The most closely related to us is the medium and low voltage power distribution system at the end of the power network, including medium voltage switchgear, low voltage power distribution cabinet, medium and low voltage transformer and other power distribution equipment, voltage level. In 10KV to 400V, it is widely used in industrial and mining enterprises, large buildings and other places. At present, many low-voltage electric energy monitoring fields mainly use the following three methods:
1. Low-voltage switch control through circuit breakers, contactors, thermal relays, fuses, control relays, various main electrical appliances, transformers and various electrical instruments (current meters, voltmeters, power meters, electric energy meters, etc.) Cabinets to achieve power distribution, control, protection, monitoring and other functions;
2. Use various types of current, voltage, power and other transmitters to connect to the PLC to build a low-voltage power distribution monitoring system;
3. Using a powerful centralized RTU, the field signals are uniformly connected to the central control room for monitoring.
These three traditional methods have many shortcomings today: the traditional switchgear needs to be equipped with a variety of analog pointer instruments and relays; it is extremely inconvenient for production, storage, and maintenance, and is mainly operated by manual operation. Computer intelligent management cannot be realized, and it is difficult to implement more complicated control logic. The use of a wide variety of transmitter wiring is complex, if you need to collect the transmitter's 4-20mA analog signal, you also need to access the PLC or the local background industrial computer, increase the cost of the system, high failure rate. It is difficult to upgrade the maintenance of the monitoring system of a multi-circuit line to a centralized RTU. If the RTU fails, the entire system cannot be operated. At the same time increase the cost of field cables.
As the earliest manufacturer engaged in the production and research and development of professional network intelligent power products, PMAC series products have been recognized by the industry for their outstanding performance and reliable quality, and have been rapidly applied in various industrial automation systems.
PMAC series product application areas:
Substation integrated automation system telecom power supply monitoring system
Unattended substation system intelligent switchgear / switchboard
Mine enterprise integrated power monitoring system municipal industry pump station monitoring system
Low-voltage intelligent power distribution system intelligent building distribution monitoring system
MCC Motor Control Center Railway Signal Power Monitoring System
Energy billing, remote meter reading system intelligent community power distribution monitoring system
Generator/motor remote monitoring intelligent box substation monitoring system
Instance resolution:
Guangzhou New Baiyun International Airport is the largest international aviation hub in South China, and one of the three gateway airports in China. The investment in the first phase of the new airport is calculated to be RMB 19.6 billion. It is the largest one-time investment project in the history of China's civil aviation. It is also the first large international machine designed and built according to the central airport concept in mainland China.
In this case, the variable distribution automation system monitors 14 distribution substations, 8 box-type substations, nearly 2,000 circuits, and thousands of measurement points. A total of more than 2,000 PMAC9900E intelligent electric energy monitoring instruments and PMAC3032 intelligent telematics devices scattered in each switch cabinet complete the on-site data collection, and the data is uploaded to the main control unit of each sub-station for processing, storage, and communication protocol conversion. And access to the star structure fiber optic Ethernet through the fiber optic transceiver to achieve centralized monitoring, measurement, control and management functions of the substation in the central monitoring room.
Thanks to the PMAC series of intelligent power monitoring instruments, all measurement and control units are directly lowered into the switch cabinet, which greatly improves the reliability of the system and facilitates future upgrades and maintenance, and minimizes the installation and wiring of the system, in line with the internationally popular distributed distribution. The on-site network structure matches its modernization and support capabilities with the future development of the airport.
1. Low-voltage switch control through circuit breakers, contactors, thermal relays, fuses, control relays, various main electrical appliances, transformers and various electrical instruments (current meters, voltmeters, power meters, electric energy meters, etc.) Cabinets to achieve power distribution, control, protection, monitoring and other functions;
2. Use various types of current, voltage, power and other transmitters to connect to the PLC to build a low-voltage power distribution monitoring system;
3. Using a powerful centralized RTU, the field signals are uniformly connected to the central control room for monitoring.
These three traditional methods have many shortcomings today: the traditional switchgear needs to be equipped with a variety of analog pointer instruments and relays; it is extremely inconvenient for production, storage, and maintenance, and is mainly operated by manual operation. Computer intelligent management cannot be realized, and it is difficult to implement more complicated control logic. The use of a wide variety of transmitter wiring is complex, if you need to collect the transmitter's 4-20mA analog signal, you also need to access the PLC or the local background industrial computer, increase the cost of the system, high failure rate. It is difficult to upgrade the maintenance of the monitoring system of a multi-circuit line to a centralized RTU. If the RTU fails, the entire system cannot be operated. At the same time increase the cost of field cables.
As the earliest manufacturer engaged in the production and research and development of professional network intelligent power products, PMAC series products have been recognized by the industry for their outstanding performance and reliable quality, and have been rapidly applied in various industrial automation systems.
PMAC series product application areas:
Substation integrated automation system telecom power supply monitoring system
Unattended substation system intelligent switchgear / switchboard
Mine enterprise integrated power monitoring system municipal industry pump station monitoring system
Low-voltage intelligent power distribution system intelligent building distribution monitoring system
MCC Motor Control Center Railway Signal Power Monitoring System
Energy billing, remote meter reading system intelligent community power distribution monitoring system
Generator/motor remote monitoring intelligent box substation monitoring system
Instance resolution:
Guangzhou New Baiyun International Airport is the largest international aviation hub in South China, and one of the three gateway airports in China. The investment in the first phase of the new airport is calculated to be RMB 19.6 billion. It is the largest one-time investment project in the history of China's civil aviation. It is also the first large international machine designed and built according to the central airport concept in mainland China.
In this case, the variable distribution automation system monitors 14 distribution substations, 8 box-type substations, nearly 2,000 circuits, and thousands of measurement points. A total of more than 2,000 PMAC9900E intelligent electric energy monitoring instruments and PMAC3032 intelligent telematics devices scattered in each switch cabinet complete the on-site data collection, and the data is uploaded to the main control unit of each sub-station for processing, storage, and communication protocol conversion. And access to the star structure fiber optic Ethernet through the fiber optic transceiver to achieve centralized monitoring, measurement, control and management functions of the substation in the central monitoring room.
Thanks to the PMAC series of intelligent power monitoring instruments, all measurement and control units are directly lowered into the switch cabinet, which greatly improves the reliability of the system and facilitates future upgrades and maintenance, and minimizes the installation and wiring of the system, in line with the internationally popular distributed distribution. The on-site network structure matches its modernization and support capabilities with the future development of the airport.
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Brand Name: OEM
Product Name: Multi USB Charger
Use: Mobile Phone
Place of Origin: Guangdong, China (Mainland)
Port: 6 port
Input: AC100-240V 50/60HZ
Size: 90*70*16mm
Weight: 250g
Materials: PC+ABS
Color: Black/White
Warranty: 1 year
Multi USB Charger,Multi Usb Wall Charger,Multiple Usb Port Charger,Multi Port USB Charger
Shenzhen Waweis Technology Co., Ltd. , https://www.huaweishiadapter.com