How to distinguish between high-voltage lines and low-voltage lines

China [CN]

Usually, high-voltage lines, refers to 3 to 10 kV lines; low-voltage lines, refers to 220/380 volt lines. Power engineers you are able to clearly identify high and low voltage lines.

From the appearance of: High and low voltage identification of the following other methods:

1: high and low-voltage lines separately and separately erected, the distance between the high-voltage line poles is greater than the low-voltage, the pole is also higher.

2: high and low voltage lines with the pole erected, high voltage lines on the top, low voltage lines in the bottom; high voltage lines cross-arms longer than the low voltage, the distance between the lines is larger than the low voltage.

Of course, distinguish the car high-voltage, low-voltage harness cable characteristics, generally in accordance with the standard requirements, high-voltage cable must be visually distinguished from ordinary car cable, the designated surface must be bright orange.

The wire of the car electric system has two kinds of low-voltage wire and high-voltage wire, low-voltage wire, there are ordinary wire, shielded wire, starter cable and battery latch cable; high-voltage wire and copper-core wire and damping wire.

Among them, the car high-voltage line can be divided into shielded and non-shielded line. Shielded wire, also known as coaxial RF cable, in the outer insulation layer with a metal textile mesh tube or many strands of wire in a layer of woven metal mesh, and then outside the mesh tube set a layer of sheath, called the shielding network.

Its role is to isolate the wire and the outside world's magnetic field, to avoid the wire by the outside magnetic field and interference, especially in the prevention of gasoline engine high-voltage ignition interference is very effective. Shielded wire is often used in low-voltage weak signal lines.

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