See if there is no quality system certification; two look at the certificate is standardized; three to see whether the name of the factory, site, inspection chapter, production date; four to see whether the printed trademark, specifications, voltage and other product details
From a macro point of view, the entire Chinese wire and cable industry, is in the rapid growth period of development. Although the price of major raw materials such as copper, aluminum
Household electricity, are generally three-phase electricity, but also three colors of the line, each color has a common name of the connection, although sometimes can also be used to reverse, but the latter part of the problem affecting the maintenance
First, with a hammer drilling, install the plastic expansion bolt, hand breaking the cover, with wood screws to the bottom plate into the expansion bolt, no hammer or impact drill time, you can directly use the cement nail the bottom plate Wall, turn and sub-line where you can use the angle, the corners, three links.
Second, the power and the socket at the...
At present, the highest piezoelectric energy in China is divided into the following:
1. High voltage of life production, rated power supply voltage: 220V for single phase and 380V for three-phase;
2. High voltage of transmission line: 10KV, 35KV, 60KV, 110 (154) KV, 220KV, 330KV, 500KV
(transmission voltage commonly used now).
3. Ultra...
Storage equipment operation, because of its long running equipment, its direction is not fixed, so the need for towline cable. If you use ordinary cable, then the cable will be easy to wear, but also affect the normal operation of the equipment
The basic structure of the industrial bus cable generally has conductor, insulation layer and outer sheath, the conductor is used to conduct current, mainly divided into solid and twisted two, conductor made of aluminum, copper and so on
General provisions, three-phase color is yellow, green, red, A, B, C three-phase respectively, and the blue is zero line, yellow, green and white for the grounding wire, wire connection with yellow, green
Insulation resistance reflects the insulation characteristics of wire and cable products, an important indicator, it with the product of the electrical strength, dielectric loss
