Three layer insulated wire introduces how to take emergency measures for electric shock

Date：2021-11-26

Type of strander: strander can be divided into single strander and double strander. The end point of the strander is the stranding point; Difference between single winch and double Winch:

Single winch: the metal wire is directly received to the shaft disc through one end point of the winch and only through the stranding point.

Double Winch: the wire receives the shaft after passing through two ends and goes through two stranding points.

Stranding principle: the copper wire of the machine stranding bow is a single copper spiral wound by the combined action of the circular motion of the stranding bow and the forward motion of the machine; Stranded copper wire is the most commonly used single copper wire. It is a kind of large-diameter conductor, which is made of copper wires in a certain order, twist distance, different specifications and different numbers. The stranded wire is much softer than a single copper wire of the same diameter, and the produced wire has better bending performance.

Every other fixed distance occurs along the strand direction, and the fixed distance of this interval is the strand pitch. Another definition of winch is: move forward along the body of the stranded wire every 360 degrees, with the unit of mm and the English letter pitch.

Naming of double Winch: its type is determined according to the specification of double winch take-up shaft. For example, the take-up shaft is 630mm, and the double winch is named 630 double winch. The composition of stranding equipment is basically the same. Except for the main machine, there are paying off (central single line, group single line), traction, take-up, transmission system and control system. According to the structural characteristics of the main winch, i.e. the installation mode of the winch, it is divided into the following types, and the models in brackets.

Naming of double Winch: its type is determined according to the specification of double winch take-up shaft. For example, the take-up shaft is 630mm, and the double winch is named 630 double winch. The composition of stranding equipment is basically the same. Except for the main machine, there are paying off (central single line, group single line), traction, take-up, transmission system and control system. According to the structural characteristics of the main winch, i.e. the installation mode of the winch, it is divided into the following types, and the models in brackets.

Judgment of stranding direction: the stranding direction is determined by the rotation direction of the machine stranding bow in the stranding movement. The general method to judge the direction of the stranded conductor is: one end of the stranded conductor is facing itself, the other end is facing away from you, and observe the upper surface of the stranded conductor:

（1）The most direct way is: place the front side vertically, for example, the copper wire texture faces the top left and the left.

(2) When a layer is far away from the observer and a wire points to the left, this layer is "left stranded". Because the inclination of a single wire is the same as the middle part of the letter S, it is traditionally also called S twist.

(3) If a layer of single wire away from the observer points to the right, this layer is "stranded to the right". Because the inclination of a single conductor is the same as that of the middle part of the letter Z, it is traditionally called Z twist.