LV power cable protective layer
Wire and cableIt is a conductor covered with an insulating layer, a protective layer, a shielding layer, etc. used to transmit power or signal current and signal voltage. According to the voltage can be high voltage cable and low voltage power cable. Low-voltage power cables and low-voltage overhead lines,Wire and cable for electrical equipmentAlthough the cost is higher compared to low-voltage overhead insulated lines, laying and maintenance is more difficult.LV power cableIt has the characteristics of reliable operation, no erection of poles, no occupation of the ground, and less affected by the outside world, and is widely used in low-voltage power cable systems.
LV power cableThe outer layer or layers of metal or non-metal material. The protective layer is used to protect the insulating layer from external damage and moisture intrusion during the transportation, laying and use of the wire and cable.
LV power cableProtective layer: low-voltage power cable protective layer is divided into two parts: inner sheath and outer sheath. The inner sheath is directly squeezed on the insulating layer, which not only protects the insulation from moisture, but also prevents the outflow of insulating oil, and has a certain mechanical strength. There are three types of inner sheath: lead pack, aluminum pack and polyvinyl chloride pack. The outer sheath is to protect the inner sheath to increase the ability of the wire and cable to withstand mechanical external forces and corrosion resistance. The outer protective layer includes an inner liner, a metal armor layer and an outer cover layer.
The inner lining cushion layer protects the metal sheath from being damaged by the metal armor layer, and additional anti-corrosion measures can be taken; the metal armor layer can withstand mechanical external force; the outer layer can protect the armored metal from external corrosion.
Plastic wire and cable protective layer: PVC sheath is usually used outside the plastic insulation.
EraserWire and cableProtective layer: the protective layer of rubber wire and cable is divided into inner protective layer and outer protective layer. There are three types of inner sheath: PVC sheath, neoprene rubber sheath (non-combustible rubber) and lead sheath; the outer sheath is divided into three types: steel tape armor, rubber sheath and plastic sheath.Medium Voltage Power CableThere is also a protective layer.
What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.
What are the precautions for wires and cables? Let's take a look. Common cable faults: wire surface markings-according to national standards, the wire surface should have continuous markings of the manufacturer's name, product model and rated voltage. This helps to find the manufacturing plant in time when there is a problem during the use of the wire, and consumers should pay attention to this when buying the wire.
There are many kinds of wire and cable products for electrical equipment on the market, which are difficult for ordinary consumers to distinguish. So what are the main categories of wire and cable products? What are the product naming principles of wire and cable? The editor brings you a brief understanding of relevant content knowledge.
The wires and cables for electrical equipment are mainly used for internal or external connection of electrical equipment, low-voltage transmission lines and various electrical signal transmission lines. Generally speaking, except for power cables, communication cables and magnet wires, most insulated wires and cables are classified as wires and cables for electrical equipment.
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable.
Low voltage power cable winter pay attention to matters? As the weather gets colder and colder, manufacturers of low-voltage power cables usually become more difficult, which brings inconvenience to construction. Here are some precautions for winter construction. Let us take a brief look.