Stainless steel cable bridge anti-corrosion performance is much higher than ordinary carbon steel bridge, Stainless Steel Cables petrochemical, Stainless Steel Cables food processing and marine shipbuilding industry and other fields often use stainless steel cable bridge laying cable. Stainless steel cable tray classification:
According to the structure classified as: trough stainless steel frame, Stainless Steel Cables ladder-type stainless steel bridge, tray-type stainless steel bridge
Material classification (corrosion resistance from low to high): 201 stainless steel, 304 stainless steel, 316L stainless steel. Routine selection of 304 stainless steel bridge, Stainless Steel Cables the surface can do drawing or spraying.
① conductor shield is squeezed in the cable conductor on the non-metallic layer, and the conductor equipotential, volume resistivity of 100 ~ 1000Ω • m. Stainless Steel Cables And equipotential potential.
② general situation 3kV and below low-voltage cable without conductor shield, Stainless Steel Cables 6kV and above the high-voltage cables must have a conductive shield.
(3) the main role of the conductor shield: the elimination of the conductor surface potholes uneven; eliminate the tip of the conductor surface effect; Stainless Steel Cables eliminate the conductor and insulation between the pores; so that the conductor and the insulation between the close contact; improve the conductor around the electric field distribution; The cable conductor shield also has the effect of suppressing the growth and thermal shielding of the electric tree.
① cable main insulation with a specific function to withstand the system voltage, the cable life cycle, to withstand long-term rated voltage and system failure when the over-voltage, Stainless Steel Cables lightning impulse voltage to ensure that the working heat does not occur in the relative or phase Breakdown short circuit. So the main insulation material is the key to the quality of the cable.
② cross-linked polyethylene is a good insulating material, now widely used, its color is green and white translucent. Low dielectric loss tangent; chemical stability; Stainless Steel Cables good heat resistance, long-term allowable operating temperature of 90 ℃; high dielectric resistance; high resistance; Good mechanical properties, easy processing and process.
① metal shield wrapped in the insulation shielding layer, Stainless Steel Cables the metal shield is generally used copper or copper wire, which is limited to the electric field inside the cable to protect the personal safety of the key structure. It is also a ground shield that protects the cable from external electrical interference.
② in the system occurs when the ground or short circuit fault, Stainless Steel Cables the metal shield is short-circuit ground current channel, Stainless Steel Cables the cross-sectional area should be based on the system short-circuit capacity, neutral point grounding calculation to determine the general 10kV system to calculate the shield cross-sectional area recommended not less than 25 square Mm.
③ In the 110kV and above cable lines in the metal shield is composed of metal sheath, Stainless Steel Cables both electric field shielding and waterproof sealing function, but also both mechanical protection.
④ metal sheath of the material and structure of the general use of corrugated aluminum sheath; ripple copper jacket; corrugated stainless steel sheath; lead jacket and so on. Stainless Steel Cables In addition there is a composite sheath, is used in aluminum foil affixed to the PVC, PE jacket within the structure, the use of more products in Europe and the United States.
Insulation thermal extension test: For cross-linked polyethylene insulation material inspection, cable main insulation of the degree of cross-linking is to examine the quality of its insulation and cross-linking process compliance. Insulation thermal extension failure, it reflects the cable insulation performance of the finished product, Stainless Steel Cables may cause the cable in the course of a long time to accelerate the aging deformation occurs, and ultimately the formation of breakdown.