Definition of power cord:
A power cord is a wire that carries current. Usually, the current is transmitted point-to-point. Power cables can be divided into AC power cables and DC power cables according to their uses. Generally, AC power cables are cables that pass through AC power with high voltage. Such cables can be formally produced by a unified standard and a safety certification party due to high voltage. DC line is basically through low voltage direct current, so the safety requirements are not as strict as AC line, but for the sake of safety, countries still require unified safety certification.
Technical standard:
Power line selection is in accordance with a number of principles, the so-called can not be written, reflection is not made up of thin air, the power line is the same. Quality appearance and other related requirements are also implemented in accordance with the power cord certification provisions, the manufacturing of power cord to be based on the principles
(1) In accordance with the Ministry of Power System Design Technical Regulations SDJ161-85 power supply
The section selection of power transmission wire is required to select the section of DC transmission power line.
(2) Technical Specification for Design of 110~500kV Overhead Transmission Line DL/T5092-1999;
(3) Technical Guidelines for High Voltage DC Overhead Transmission Lines DL436-2005.
Meaning of specifications and models of wires and cables
RV: Copper core vinyl chloride insulated connecting cable (wire).
AVR: tinned copper core polyethylene insulated flat connection flexible cable (wire).
RVB: copper core polyvinyl chloride flat connection wire.
RVS: copper core PVC twisted wire connection.
RVV: copper core polyvinyl chloride insulated polyvinyl chloride sheathed circular connection flexible cable.
ARVV: tinned copper core PVC insulated PVC sheathed flat connection flexible cable.
RVVB: copper core PVC insulated PVC sheathed flat connection flexible cable.
RV-105: Copper core Heat resistant 105. C PVC insulation PVC insulated cables are connected to flexible cables.
AF-205AFS-250AFP-250: Silver plated polychloroethofluoride plastic insulation high temperature resistance -60. C to 250. C Connect the flexible cable.
The article is selected from Baidu Baike, a professional power cord supplier of Huashan Industry.