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DC OVERVOLTAGE PROTECTION SYSTEMS

Environmental protection inspection exemption for communication base station energy management system

At present, the national standard for electromagnetic radiation protection, "Electromagnetic Radiation Protection Regulations" (GB8702-88), stipulates that when the equivalent radiation power of the electromagnetic radiator is less than 100W (50dBm) within the current mobile communication frequency band, an electromagnetic environment exemption can be implemented; when the equivalent radiation power of the electromagnetic radiator is greater than 100W (50dBm), an "Environmental Impact Report (Form)" should be submitted to the environmental protection department. [pdf]

Detailed rules for supervision of containerized energy storage systems

As for supervision and control system for electrochemical energy storage station (referred to as "supervision and control system"), this document specifies the requirements for data acquisition, data processing, control and regulation, alarm, event sequence recording and accident recollection, communication, data storage, human-computer interfaces, system time synchronization and system load rate, describes the corresponding test methods, and stipulates the normal working conditions and system architecture, as well as marking, packaging, transport and storage of the supervision and control system. [pdf]

Base station equipment for communication systems

The basic base station equipment for digital mobile communications systems consists of amplifiers (AMP) to amplify the transmission and reception signals to desired levels, modems (MDE) to convert base band signals to high-frequency signals, speech processors (SPE) to convert voice signals to digital code strings, base station control equipment (BCE) that allocates radio channels and switches over channels with adjacent base stations, and the base station antennas (ANT). [pdf]

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