Discussion on XLPE Insulated Power Cable
Cross-linked polyethylene insulated power cables are commonly used in civil engineering, including ordinary type, flame retardant type, fire-resistant type and halogen-free low-smoke flame retardant type. XLPE insulated power cable is resistant to environmental stress, has the characteristics of high mechanical strength, chemical resistance, excellent electrical performance, simple structure, light weight and convenient use.
1. XLPE insulated power cable use: This product is suitable for power lines with rated voltage (U0 / U) from 3.6 / 6 to 26/35KV, used for energy transmission and distribution.
2. XLPE insulated power cable standard: aluminum core plastic insulated power cable, GB12706-91 rated voltage 35KV and below copper core.
3. The use characteristics of cross-linked polyethylene insulated power cables:(1) When the cable is laid at an ambient temperature of not less than 0°C, there is no need to preheat. There are no restrictions on cable laying. (2) The long-term allowable working temperature of the cable core wire shall not exceed the following regulations: 90 ℃ for cables with PVC sheath; 80 ℃ for cables with polyethylene sheath. (3) When the wire core is short-circuited (for a maximum of 5S), the temperature should not exceed 250°C. (4) The minimum bending radius when laying the cable is as follows: single-core cable: 20(d D)± 5%; three-core cable: 15(d D)± 5%, in the formula: d is the actual outer diameter of the conductor, D is the actual outer diameter of the cable.
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.