The role of low voltage power cable
A cable is a conductor covered with an insulating layer, a protective layer and a shielding layer, used to transmit power, signal current and signal voltage. Compared with low-voltage overhead lines and low-voltage overhead insulated lines, although low-voltage power cables are expensive and difficult to lay and maintain, they are reliable in operation, do not erect columns, do not occupy the ground, are not ugly, and are less affected by external influences. and widely used inLV power cablein the system.
LV power cableWhat is the role?
LV power cableIt is a cable used to transmit and distribute electrical energy. They are commonly used in urban underground power grids, power station outgoing lines, internal power supplies for industrial and mining enterprises, and underwater transmission lines across rivers. At present, there are single-core, double-core, three-core, four-core and five-core household low-voltage power cables. Single-core cables can be applied to single-phase lines or three-phase lines as required. Two-core cable for single-phase line. Three-core, four-core and five-core cables are used for three-phase three-wire and three-phase four-wire respectively.
How to choose low voltage power cable?
Aluminum core cables should be used in general environments and places, while copper core cables should be used in places with strong vibration, special buildings and special requirements.
Laying on the groundLV power cableAn outer sheathed armored cable is usually used. Plastic sheathed cables and lead (aluminum) sheathed cables with an outer sheath can also be used where mechanical damage is unlikely.
In the soil with chemical corrosion or stray current corrosion, buried type should not be used as much as possible.Electric wireCable. If you want to bury it in the ground, you should use anti-corrosion cables.
The wire and cable laid in the pipeline usually uses plastic sheathed cable, but also uses bare armored cable.
Wire and cable for electrical equipmentCables laid in cable trenches or cable tunnels should not use flammable or extended external sheaths. Generally, exposed armored cables, plastic sheathed wire cables, and exposed lead (aluminum) covered cables are used.
When placing wires and cables in places with large height differences, plastic insulated cables, dripless cables and dry insulated cables should be used.
Medium Voltage Power CableThe choice should also be paid attention.
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.