GB 4943.21-2019 Translated English of Chinese Standard. GB4943.21-2019: Information technology equipment - Safety - Part 21: Remote power feeding
https://www.chinesestandard.net, 21. 3. 2020 - Počet stran: 20
This Part of GB 4943 specifies safety requirements for remote feeding telecommunication circuit. This Part is applicable to information technology equipment that is intended to supply and receive communication network power, and the voltage exceeds the TNV circuit limit.
accessible area capacitor checked by inspection circuit is isolated circuit load equipment circuit powered equipment Compliance is checked conductor and ground conductor to ground connected to telecommunication connection points contact current control device current flowing current limit DC current DC power effective capacitance electric shock exceed the limit feeding telecommunication circuit ground conductor hand to hand harmful physiological effects higher voltages Human body resistance human current Information technology equipment inspection and measurement IRFT isolated from ground limits given Limits under normal Limits under single monitoring device normal operating conditions Normative references open circuit voltage placed or protected power supply equipment properly placed rated voltage remote feeding telecommunication Remote power feeding resistor RFT circuit voltage RFT-C circuit load RFT-C circuit power RFT-C circuit-powered equipment safety requirements secondary circuits simulate single fault conditions steady-state current surge suppressor telecommunication network wiring ungrounded ventricular fibrillation voltage exceeds voltage not exceeding voltage rating