Silicone Rubber Overhead Line Cover Used on Power Substation
Time: 2015-06-06 09:29:34 Copyfrom: volsun
With economy developed, environment pollution is getting worse, the situation of power substaion insulation and protection is serious, especially for the old substation. Pollution flashover, raining flashover, line trip because of icing, small animals, uncovered busbar, all caused to damages and injury accidents. More and more power substations choose silicone rubber overhead line cover to insulate the substaion.
Silicone rubber overhead line advantages, compare to heat shrink tubing:
Heat shrink insulation materials for the substation can reduce the incidence of such accidents, improve the reliability of power supply system and safety. However, when remoulding the power system equipment, need to shut down operation of power substaion, the remoulding is very inconvenient, and does not seal tight enough for special shaped casing joints. With the temperature raising, the busbar span life will decrease, plus the humidity of the environment, and moisture absorption due to severe heat, will lead to further materials insulation properties damage, may results to disruptive discharge. And never to say aging and deformation damage because of outdoor harsh environment, it is inconvenient to costly to replace the insulation sleeve.
In order to eliminate these shortcomings, silicone rubber overhead line cover has researched the substation application. Tangshan electric power company of China in 2008 launched a dry-type reactor with silicone rubber all-insulated, excellent insulation effect, dry hollow reactor field-insulated proved insulation treatment process advanced and easy, you can easily processing operation dry hollow reactor equipment, so as to prevent small animals from entering the device interval of damage caused by the reactor accident. Artificial short-circuit tests proved that the reactor can effectively prevent fire accidents due to the small animals after a full insulated phase short circuit.
Highly flame resistance of silicone rubber cover. Electrical equipment insulation materials request for flame-retardant. Main part is rubber polymer blends, add the excellent performance of flame to reach the FV-0 flame retardant grade to meet the flame retardant requirements of the power system.
Anti-aging property of silicone rubber cover. Silicone rubber overhead line cover span life can up to 20 years, which greatly reduces the cost of recoating, power outages and blackouts caused economic losses.
Excellent thermal conductivity of silicone rubber cover, can effectively reduce the operating temperature of the busbar, increase the carrying capacity to solve the aging cracking due to temperature rise.
Construction convenient and fast. Construction of the power substation time is very limited, which requires the construction work is simple and fast. Between silicone rubber cover and busbar, using adhesive to bond. First brush some adhesive on silicone rubber cover, then put it around the wire and zipper it closed, no need special tools, usually a person can complete the all operations. And the insulating protective cover layer can be factory-made, but also on-site construction, cost savings, and improve sealing performance.
Excellent insulation resistance property. When power equipment is running, it is inevitable to create arc rectifier in cabinet, since the silicon rubber ovehead line cover with excellent insulation properties, can greatly improve the power distribution of busbar withstand voltage level, reducing the air breakdown, the short-circuit failure caused by voltage reduction, thus avoiding a short circuit between busbars accidents due to the small animals climbing, to ensure the safe operation of power equipment.
