Welcome to the ZMS CABLE information blog, here is the cable industry knowledge sharing and technology popularization of the professional world. In this section, we focus on cable technology, product applications, and industry knowledge, carefully crafting a series of easy-to-understand and practical content, to provide readers with authoritative technical support and comprehensive industry interpretation.
Conductor shielding:
According to relevant industry standards, cables with rated voltage exceeding 2KV need conductor shielding. Conductor shielding, also known as inner shielding, is used to form a smooth layer on the relatively rough surface of the stranded conductor to reduce the concentration of electric field at the insulation interface.
The durability and reliability of mineral cable are more advantageous than traditional cable. In addition, the mineral cable is also fire-resistant, mineral cable continuous working temperature of 250 ℃. It can supply power continuously for 3 hours at 950 °C-1000 °C, and can work close to the melting point of copper 1083 °C for short periods or extraordinary periods. Due to the excellent performance of the mineral insulated cable. Therefore, it is suitable for lines with a rated voltage below 1000V.
The typical products of suspension clamp now retain the U-bolt style (usually called ship clamp). It is composed of a hanger U-bolt, clamp hull, and pressing plate made of malleable cast iron. The other is a pre-twisted suspension clamp. The suspension clamp is used to fix the conductor on the insulator string of the linear pole and tower or hang the lightning conductor on the linear pole and tower. It can also be used to support the transposition conductor on the transposition pole and tower and fix the jumper of the tension angle pole and tower.
A mineral insulated cable is a cable with a copper sheath wrapped around the copper conductor core and magnesium oxide powder as inorganic insulation material to isolate the conductor and sheath. The outermost layer can be selected as required with the appropriate protective jacket.
Fire-resistant in mineral insulated cable, due to the entire material of this cable, are used inorganic materials. So it has some advantages that are not possible with other cables. Fire resistance is applied in mineral insulated cables.
Copper-clad aluminum wire can be divided into two categories: one is the copper-clad aluminum wire used for signaling or communication. The other type is the copper-clad aluminum wire used for the power supply.
Bare Conductor Wire
Bare wire and bare conductor products refer to the conductive wire without insulation and sheath. It mainly includes three series of products: bare single wire, bare stranded wire and profile wire.
Copper and aluminum single wire: including soft copper single wire, hard copper single wire, soft aluminum single wire, hard aluminum single wire. Mainly used as a variety of wire and cable semi-products, a small amount of communication wire and motor appliances manufacturing.
1. The function is different: switchgear is a complete set of electrical switchgear and control equipment, it is used as a power center and the main distribution device, mainly to play the role of a switch on and off. And distribution cabinet is to plays the function of distribution of electrical energy, line overload, short circuit, leakage protection role.
What is the internal structure of the power distribution box and distribution cabinet? The most detailed explanation, learning collection essential!
“Distribution box”, also called distribution cabinet, is the collective name of the motor control center. A distribution box is according to the electrical wiring requirements of the switchgear, measuring instruments, protection appliances, and auxiliary equipment assembled in the enclosed or semi-enclosed metal cabinet or screen width, constituting a low-voltage power distribution device.
What are overhead line fittings?
Overhead line fitting is an accessory that connects and combines various devices in the power system to transfer mechanical and electrical loads or to play a protective role.
Overhead line fitting is an important part applied to the “power grid”, there are very many cross nodes in the power system of power transmission and distribution. Line crossings form a network, and each line crossing point needs to be fixed. There are many substations in the grid that form the intermediate nodes of the grid, and there are many power towers that support the main lines of the grid. The transmission of electrical energy requires conductor contact to be carried out and sufficient current-carrying area to be maintained at high power levels. That is, the grid equipment and conductors such as conductors ensure good and solid contact between.