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   power cable insulation material should have the What are the main performance [08/02 03:30AM]   
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A; have the following main properties: (1) high breakdown strength; (2) low dielectric loss; (3) a very high insulation resistance; (4) Excellent resistance to discharge performance; (5) has a certain degree of flexibility and mechanical strength; (6) The insulation properties of long-term stability.
mechanical laying of cables,Toshiba pa3285u-3bas Battery the traction strength of the regulations? A: For copper cables, when the traction when the head, allowing traction intensity 70N/cm; for Aluminum Core cable, when the traction when the head, allowing traction intensity 40N/cm; if the use of steel mesh set of traction, the lead care sets of cables to allow intensity 10N/cm; Lead-sheathed cable 40N/cm.
for cable protection tube of the regulations? Answer: (1) the laying of cables need to wear protection tube, the tube diameter of not less than 1.5 times the cable diameter, concrete pipes, clay pipes, asbestos cement pipe diameter of not less than 100mm; (2) cable tube bending radius should be consistent with the penetration of cable bend radius requirements; (3) Each tube should be up to more than three elbows, right-angle bends should not exceed 2. how to measure the diameter of cable jacket? A: Toshiba satellite a100 Battery In the jacket uniformly distributed on the circumference five points, measurement jacket diameter and its average diameter for both the average diameter of jacket.different sections of copper cable how to connect? A: The different sections of copper cable, copper can be used back to take over a weak opening to tin solder method to connect, can also be used by different cross-section of copper rod into copper if requested to take over in order to crimp method to connect.
bus device construction finished, what checks should be carried out? Answer: should be carried out the following examinations: (1) metal components processing, preparation, welding screw provided assistance to meet the requirements; (2) ministries bolts, washers, pins and other openings should be complete and reliable parts and components; (3) preparation and installation of bus frame shall comply with the provisions of interphase and electrical-to-ground distance to meet the requirements; (4), porcelain pieces,Toshiba satellite a105 Battery iron pieces and glue Department should complete oil-filled casing should be no oil leakage, oil level to normal; (5) paint a complete, phase color correct and a good grounding.


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