Definition of power cord:
A power cord is a wire that transmits electrical current. The usual way of current transmission is point-to-point transmission. Power cords can be divided into AC power cords and DC power cords according to their purposes. Usually, AC power cords are wires that pass through high voltage AC power. These types of wires require a unified standard to obtain safety certification before they can be officially produced due to their high voltage. DC lines are mainly powered by low voltage direct current, so their safety requirements are not as strict as AC lines. However, for safety reasons, countries still require unified safety certification.
Technical standards:
The selection of power cords is based on certain principles, and as the saying goes, it cannot be ignored. Reflection is not fabricated out of thin air, and the same goes for power cords. The requirements for quality, appearance, and other related aspects are also implemented in accordance with the certification regulations for power cords. The principles for manufacturing power cords include
(1) According to the "Technical Code for Design of Electric Power System" SDJ161-85 issued by the Ministry, regarding electricity
The requirements for selecting the cross-sectional area of power transmission lines are to select the cross-sectional area of DC power transmission lines;
(2) Technical Code for Design of 110~500kV Overhead Transmission Lines DL/T5092-1999;
(3) Technical Guidelines for High Voltage DC Overhead Transmission Lines (DL436-2005).
The meaning represented by the specifications and models of wires and cables
RV: Copper core vinyl chloride insulated connecting cable (wire).
AVR: Tin plated copper core polyethylene insulated flat connection flexible cable (wire).
RVB: Copper core polyvinyl chloride flat connection wire.
RVS: Copper core PVC twisted connection wire.
RVV: Copper core PVC insulated PVC sheathed circular connection flexible cable.
ARVV: Tin plated 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 insulated PVC insulated flexible cable.
AF-205AFS-250AFP-250: Silver plated polyvinyl chloride fluoroplastic insulation with high temperature resistance of -60. C~250. C connects to a flexible cable.
The article is selected from Baidu Baike - Xuanhua Industrial's professional power cord supplier.