10KV mine cable testing process <br> <br> First, the production process of the outer shield should be a "semi-conductive extruded semi-conductive shield wrapped + + shielded metallic braid shield" structure rather than extruded semi-conductive shield After the metal braided shield is directly applied, a layer of external semi-conductive shield tape is wound around the insulated wire core to prevent the braided shield from being embedded in the extruded insulation shield and affect the partial discharge performance.
Second, the processing requirements of the cable ends. Insulation shielding layer should be peeled off with utility knife and needle nose pliers. The end of shielding layer should be in the same section and should have transitional slope. It must not damage the insulation body. The insulation surface should be cleaned with fine wood, and no semi-conductive material can remain. The insulation part of the core end should be trimmed and the exposed part of the conductor should be closely and neatly cleaned with absolute ethanol. The transformer oil used in the test should be pure and must not contain impurities such as water and suspended solids. Insert the oil cup at both ends of the cable. The insulating oil must be submerged in the insulating shield cut-out. The contact between the cable conductor and the cup electrode must be sufficient to ensure that the tip is not discharged during the test.
In addition, 10KV mine cable products must be strictly controlled in process turnover and on-machine production processes. In particular, the control over the parameters such as vulcanization temperature, vulcanization time, steam pressure, and take-up and release line speed of the product insulation extrusion process should be strengthened to prevent the product from being Sulphur and core water in the production process affect the PD results.
Overhead sectional door most widely used for loading areas on all types of industrial premises and Designed with a curved overhead track, these vertically-opening sectional doors can be installed in areas with reduced head room. They provide heat and sound insulation with its composite panel construction.
The counterbalance and cable system provides quiet and straight forward operation for manual doors. Electric operation is available for larger applications that can incorporate many alternative operator options to suit all client requirements.
The standard outer panels are manufactured from 0.5mm thick, high quality zinc coating to BS EN 10147
For the best weather protection the sectional door panel has an interlocking hinged joint integrating a high quality seal the full length of the panel.
A counterbalance system is incorporated into the sectional overhead door to ensure efficient and effortless operation.
The counterbalance comprises of springs mounted on a steel shaft that are high tensile helical wound steel. It has been heat treated for enhanced performance for around 50,000 cycles.
Reducing shaft friction is achieved with the aid of brackets and guide rollers incorporating highest quality sealed bearings.
Overhead Sectional Door,Overhead Sectional Garage Door,Automatic Overhead Sectional Door, Overhead Insulated Garage Door
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfautodoors.com