Water-cooled cable's basics and characteristics

What is a water-cooled power cable?

Water-cooled cable is a kind of special cable with hollow water supply, which is used for high current heating equipment. It is usually composed of electrode (cable head), conductor and outer protective sleeve.

The electrode of ordinary water-cooled cable is welded by copper pipe and copper bar, which is not closely connected with the equipment; The conductor is made of bare copper wire with large bending radius. The external protective sleeve uses ordinary rubber hose with low pressure resistance. The sleeve and electrode are fastened with ordinary clamps, which has poor sealing and is easy to leak.

The high-quality water-cooled cable electrode is made of integral copper bar turning and milling, and the surface is passivated or tinned. The conductor is made of tinned copper stranded wire or enamelled wire woven by CNC winding machine, with high flexibility and small bending radius. The outer protective sleeve adopts synthetic rubber pipe with reinforced cloth clamping layer, with high pressure resistance. The sleeve and electrode are cold extruded and fastened on professional equipment with red copper clamp, which has good sealing and is not easy to leak.

Performance characteristics of power cable  

1. The electrode (also known as cable head) is made of a whole copper bar on a CNC lathe and milling machine without contact, solder joint and weld, which is beautiful, durable and low resistance;

2. The outer sleeve is made of high-quality rubber hose, with water pressure resistance > 0.8MPa and breakdown voltage resistance higher than 4000V. There is also a flame retardant outer sleeve for users to choose in special occasions;

3. The connection between the electrode and the outer sleeve shall be fastened with 1Cr18Ni9Ti stainless steel clip, which is non-magnetic and rust free;

4. The copper conductor is made of thin seven pack wire wound in layers on a special winding machine. Soft, small bending radius;

5. Seven pack wire is used as water-cooled cable, which has high power transmission efficiency. Due to the insulation between each seven clad wire and the conduction of medium and high frequency current, there is no surface skin effect. Compared with other water-cooled cables with the same section, the heating capacity is less when passing the same current;

6. Using tinned copper stranded wire or enamelled wire as the conductor of water-cooled cable can improve the service life of water-cooled cable. Because the conductor of water-cooled cable is immersed in water for a long time, the working environment is very bad. In the past, we used bare copper wire as water-cooled cable. When the water-cooled cable is used for a period of time, open the cable jacket and you will see a layer of green copper rust on the surface of the conductor. Later, we used tinned copper stranded wire or enamelled wire as water-cooled cable. Because tinned copper stranded wire or enamelled wire has tin or seven film protective layer, it can play an anti-corrosion role. According to users, the service life of water-cooled cable made of tinned copper stranded wire or enamelled wire is 1.5~2 times that of bare copper wire.