Identifying the Specifications and Models of High-Voltage Cables for New Energy Vehicles

China [CN]

Generally, high-voltage lines refer to 3-10 kV lines; low-voltage lines refer to 220/380 V lines. As an electrical engineer, you can clearly distinguish high- and low-voltage lines.

From the outside: There are several ways to distinguish high and low voltage:

1: When high and low-voltage lines are installed separately, the distance between high-voltage line poles is greater than that for low-voltage lines, and the poles are also taller.

2: When high and low-voltage lines are installed on the same pole, the high-voltage line is on top and the low-voltage line is on the bottom; the crossarms of the high-voltage line are longer than those of the low-voltage line, and the distance between the lines is greater for the low-voltage line.

Of course, to distinguish the characteristics of high- and low-voltage wiring harnesses in a vehicle, generally, according to standards, high-voltage cables must be visually distinguishable from ordinary automotive cables, and their designated surface must be a bright orange color.

Automotive electrical wiring consists of two types of wires: low-voltage and high-voltage. Low-voltage lines are further divided into ordinary wires, shielded wires, starting cables, and battery ground cables; high-voltage lines are further divided into copper core wires and damping wires.

High-voltage cables within vehicles can be divided into shielded and unshielded cables. Shielded cables, also known as coaxial RF cables, consist of a metal textile tube within the outer insulation layer, or multiple strands of wire enclosed in a woven metal mesh, then covered with a sheath (called a shielding mesh).

Shielding cables isolate the wires from external magnetic fields, preventing interference caused by these magnetic fields. They are particularly effective in preventing high-voltage ignition interference in gasoline engines. Shielded cables are often used for low-voltage, weak signal lines. To distinguish high-voltage from low-voltage cables:

To learn about cable specifications, refer to the nameplate on the outermost layer. The outermost layer typically displays relevant cable parameters, including cable model, cross-sectional area, rated voltage, and length. OMG specializes in automotive cable products. Please visit: https://www.omgevcable.com