Industrial plugs and couplers are mainly divided into four categories: plugs, sockets, connectors and appliance input sockets, which are generally referred to as industrial plugs. Its main features are as follows:

1. safe and reliable

① The rated voltage of such products is indicated by the color of the casing, such as: 40V-45V is purple, 110V-130V is yellow, 200V-250V is blue, 230V-415V is red and 500V is black. Easy to distinguish, and can't make a mistake.
② The diameter, pole number and grounding contact position of products with different specifications are different, and only the same specifications can be plugged in, thus preventing wrong plugging.
(3) have electric shock protection. The grounding electrode sleeve in the socket is longer than the phase electrode and neutral electrode sleeve, so as to ensure that the grounding electrode is connected before the phase electrode is connected when the plug is inserted, and the grounding electrode is finally separated when it is pulled out, which is very safe to use.
(4) There is a retaining device, which makes the plugs and sockets tightly locked after being plugged in to prevent them from falling off, thus better improving the reliability.
⑤ The protection level is high. There are IP44 splash-proof type and IP67 immersion-proof type. Not only can the human body not touch the live parts, but it can also be used under different environmental conditions to ensure safety.
⑥ An elastic hoop is added to the sleeve. Ensure tight contact, good conductivity and long service life after inserting the bolt.
⑦ There is a cable clamping device, which can clamp the cable sheath so that it can be fixed without being pulled off, and it is safe to use.

2, durable

① Good mechanical properties. The product shell is made of high-quality engineering plastic, which has high strength, impact resistance and is not afraid of falling. The rubber and plastic used are anti-aging, which can be used not only indoors but also outdoors, and are durable.
② Heat and flame resistance. The shell and internal insulation parts have heat resistance, the temperature can reach (100±5)℃, and important parts can withstand (125±5)℃; And has flame retardancy.
③ It is more resistant to plugging and unplugging. For example, for products with rated current 16A, the number of normal unplugging operation cycles is more than 5000 times.
④ The temperature rise test of conductive contact parts shall not exceed 50K, which is suitable for long-term use.

3, strong universality

The products adopt GB/T 11918 ~ 11919-2001 standards, which are equivalent to IEC 60309-1 and 2 standards, and are completely in line with international standards. Therefore, this kind of products can be used both at home and abroad. At the same time, its specifications and varieties are various, which can meet various occasions and uses.

These characteristics of industrial plug and socket make it have high safety, reliability and international universality. Therefore, it has been paid more and more attention in China. Through continuous popularization and application, industrial plugs and sockets have gradually entered various industries, such as electric power, ports and docks, machinery industry and large buildings. With the development of science and technology, industrial plugs and sockets are constantly innovating, and various rapid installation technologies have been gradually applied to plugs and sockets, making it more convenient to use.