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Cable water treatment method
The reason and treatment of cable water
Cable manufacturer hazard: The cable of the mine water, under the effect of the electric field, the phenomenon of water tree aging occurs from time to time, resulting in cable failure. Water trees are ineffective at the collection of water with diameters of 0.1M to several microns. The presence of impurities in the pores and insulation, insulation and outer semi-conductive layers combine with the unevenness of the surface of local high electrical parts, the starting point of the water tree. The development process of water trees is generally more than 8 years. The higher the humidity, temperature, and voltage, the more water contains ions, water, and the faster development of trees.
the reason
One cylinder cable is in charge of new ones, and the plastic sealing sleeves at both ends are sealed, but after a period of time, the rest are wrapped with plastic paper, and the rope is used outside, and the sealing performance is not good. After a long period of time, water vapor can be worn. Through the cable.
2 Cables are laid when cables are laid, plastic papers are sometimes immersed in water, and the water enters the cable; the tube, traction and worn outer jacket cracks occur from time to time.
3 It is not laid in time after laying and cable heads are manufactured. No cable port sealing treatment is exposed to air for a long time. Even in water, water vapor enters the cable.
In the cable head 4 cable heads are manufactured (including when the terminal and the intermediate connector), due to production personnel, sometimes the cable end of the cable slips into the water.
The operation of the 5 fiber cable intermediate joints causes breakdown of the faulty cable Wells. The water enters the cable along the gap; at the construction site, external cables are broken or broken down, and cables are also provided.
How cable manufacturers handle leaks
After drying the treated water is a very difficult cable (such as hot nitrogen pressure blow dry), generally no corresponding configuration. In practice, if the cable material R6, we just put in a few meters before, if the overall cable is water, we are not desirable. Therefore, in order to prevent cable entrances, prevention should be taken mainly and the following measures should be taken:
1 The end of the cable head cable is sealed off, either stacked or laid, and the plastic (special cable gland) that should be sealed prevents moisture penetration.
Production should be conducted in time after the 2 wire laying cable head.
The purchase of cable 3, we must choose a good quality manufacturers. Due to insulation impurities, porosity is the starting point of water, so the quality of the cable prevents the water tree from aging.
4 Strengthen the management of cable head production process Once the cable entry, it is often the first occurrence of the fault phenomenon is the cable head, so the production head of the wire head can extend the cable life. As in stripping the semiconductor layer of the cable, we have drawn some of the semiconductor layers and then stripped the semiconductor like sugarcane. However, if the cut is too deep, it will injure the insulating layer and create opportunities for water trees. In addition, the solder, because of the lack of power, directly melts the solder with the torch, at this time, the flame will damage the copper shield and the insulating layer, and put an end to this phenomenon, the correct way to configure the UPS, because usually the welding time is only 10 minutes, But 500W power.