Z7138 HIMA DI preterminal

Z7138 Wire and cable: Usually consisting of several or groups of conductors [each group

of at least two] twisted together, similar to rope. Each group of wires is insulated from

each other and is often twisted around a central wire, with a highly insulated covering

covering the entire outer wire. Used to transmit, distribute or transmit electrical energy.

The Z7138 cable consists of the following four parts

1, conductive wire core: made of high conductivity material (copper or aluminum). According to the

requirements of cable softness, each wire core may be twisted by a single wire or multiple wires.

2, insulation layer: used as cable insulation material should have high insulation resistance. Insulation

materials commonly used in cables include oil-impregnated paper, polyvinyl chloride, polyethylene, cross-linked polyethylene, rubber, etc.

3, sealing sheath: protect the insulation core from mechanical, moisture, moisture, chemicals, light and other

damage. For insulation susceptible to moisture, lead or aluminum squeeze seal sheathing is commonly used.

4. Protective covering layer: used to protect the sealing sheath from mechanical damage. Generally, galvanized

steel tape, steel wire or copper tape, copper wire as armor wrapped in the sheath (called armored cable),

armored layer also plays the role of electric field shielding and prevent external electromagnetic wave interference.

In order to avoid the corrosion of steel belt and steel wire by the surrounding medium, they are generally coated with asphalt or wrapped impregnated jute layer or extruded polyethylene, PVC sleeve.

(1) Classification by insulating materials, such as oil-soaked paper insulated cables, polyvinyl chloride cables, cross-linked polyethylene cables, etc.

(2) They are classified into power cables, communication cables and control cables according to their uses. They

are used in power system, information transmission system, mechanical equipment, instrument and meter system.

1. Power system

Wire and cable products used in power system mainly include bare overhead wire, busbar (busbar), power cable

(plastic cable, oil paper cable (basically replaced by plastic power cable), rubber sheath cable, overhead insulated cable),

branch cable (replacing part of the bus), electromagnetic wire and electrical equipment for power equipment, etc.

2. Information transmission system

Wires and cables used for information transmission system mainly include local telephone cable, television cable,

electronic cable, radio frequency cable, optical fiber cable, data cable, electromagnetic line, power communication or other composite cable.