深圳市鑫世隆贸易有限公司在深圳成立。代理壳牌润滑油（SHELL）、埃克森美孚润滑油（MOBIL）、埃索润滑油（ESSO）、福斯润滑油（fuchs)、克鲁勃润滑油（Klueber）、嘉实多润滑油(CASTROL)、BP润滑油等知名品牌润滑油，产品含涵盖美孚液压油、美孚齿轮油、壳牌齿轮油、壳牌液压油、克鲁勃液压油、克鲁勃齿轮油、BP液压油、BP齿轮油、嘉实多切削液、嘉实多切削油、BP冷冻机油、美孚工业润滑油、美孚润滑脂、美孚冷冻机油、壳牌冷冻机油、壳牌机油、壳牌空气压缩机油、专注服务于工业，依托于高品质的产品、的技术、专业的人才、完善的服务为客户提供高效益的综合解决方案。　　始终如一的提供用户满意的润滑油产品,满足多元化的不同需求，保证了产品品质与世界同步集油品储运、销售、服务于一体，拥有稳定的质量保障体系，创新的企业经营营销理念，能够为市场和广大消费者提供世界水平的优质产品！　　成立数年以来先后已成为众多知名企业的供应商，服务范畴涵盖汽车、汽车制造、机械、冶金、采矿、钢铁、工程、农业、电梯、石油化工等领域。在全国各地销售的产品已达千余个品种，除了标准产品之外，更有大量专业性的定制产品，可满足不同的客户需求。并不断突破创新取得了可喜的经营业绩，得到了众多客户和供应商伙伴一致的高度认可。　　今天的科技将继续充分发挥人才、产品、服务的专业优势，实现与客户、合作伙伴,为客户创造价值，为社会创造财富，使科技成为客户值得信赖的长期合作伙伴和有影响力的行业新典范。　　未来，我们将持续秉承“专业、整合、服务”的经营理念，在各个事业领域，为企业提供专业、 系统、高效的解决方案，*终提升客户价值，实现双赢！

Perfecto TR RC Transformer oil Description Castrol Perfecto TR RC is a high quality, mineral based insulating oil which meets or exceeds IEC 60296 (03), ASTM D3457, IEEEC 57, 106, BS 148 ａnd AS 1767 ａnd is designed for use in transformers ａnd electrical switchgear. This product contains re-processed oil. Application Purity – the oil as an insulant Freedom from traces of water, dust ａnd fibrous material is of the highest importance in a transformer oil. The presence of such contaminants in an oil seriously lowers its electrical strength by creating paths for the passage of a spark or arc. The term “electrical purity” has been used in these notes to express this feature. Perfecto TR RC, where supplied in 205 litre drums, possesses a guaranteed electrical strength of 40 kV minimum at time of filling. Where supplied in smaller containers this guarantee cannot be maintained owing to the difficulty of ensuring absolute cleanliness of these containers Heat Conductivity In all forms of energy conversion, be they mechanical or electrical, some losses are unavoidable ａnd these usually result in the formation of heat. If, after a limited initial temperature rise, this heat is not dissipated as rapidly as it is formed, the temperature of the system may climb to a dangerous level. Electrical transformers are no exception to this general rule. There is a definite, ａnd rather low, limit to the maximum temperature that they can be allowed to attain. This limit is set by the insulation; if it is exceeded, the insulation will break down ａnd the transformer will fail. Heat can be dissipated in three ways, by convection, by radiation ａnd by conduction, each of which comes into play for the heat generated in the iron core ａnd copper conductors of a transformer. In most large units an intermediate medium for heat dissipation is provided by the oil, the rate of heat transfer is mainly governed by the oil’s heat conductivity ａnd heat capacity, ａnd by the effect of convection. Heat removal by oil is mainly a function of viscosity, since a less viscous fluid is able to circulate more rapidly under the effect of convection. Accordingly, transformer oils should have the lowest possible viscosity consistent with its other desirable properties. Low viscosity oil, too, is more “efficient” in this action. It circulates more easily within the winding ａnd ducts of the transformer ａnd thus helps to prevent the formation of local hot spots. Perfecto TR RC is formulated to a relatively low viscosity to ensure efficient heat dissipation. Although low viscosity is a desirable feature, oils of low viscosity generally have the highest volatility. Perfecto TR RC is formulated with a base oil having a low vapour pressure at the operation temperature of the equipment to ensure that loss by evaporation ａnd undue fire risk may be avoided. Volatility is one of the chief factors setting the lower limit of viscosity. The flash point of oil is related to its volatility ａnd it must be recognized that whenever hot petroleum oils are in contact with electrical equipment, fire ａnd explosion are potential risks. To lessen these hazards Perfecto TR RC exceeds the minimum flashpoint of 140°C. This flash point is appreciably higher than the maximum temperature a transformer is likely to reach. Page: 1/3 Approval Status Perfecto TR RC meets or exceeds IEC 60296 (03), ASTM D3457, IEEEC 57, 106, BS 148 ａnd AS 1767 for transformer oil for transformers ａnd switchgear. Advantages Low Pour Point Perfecto TR RC has a relatively low pour point to resist wax separation at low temperatures. High Chemical Stability Transformers may generate excessive temperatures, either from high loading or sludge formation impeding heat transference. These temperature increases place additional stresses on the insulation materials ａnd the oil. Under these conditions the rate of oxidation ａnd acidity increase in the oil may be delayed or inhibited by the addition of antioxidants. Perfecto TR RC has been developed to satisfy these arduous operation conditions. Switchgear Oils The major components of oil filled switchgear are circuit-breakers, current ａnd potential transformers ａnd bus-bar chambers. With switchgear components the chief function of the oil is the quenching of the electric arc that forms between the contacts as they separate. However, insulation ａnd cooling are also important. The most important requirement in quenching an arc is that it should occur in the shortest possible time especially when the circuit-breaker, for example, is operating to clear an electrical fault. It has been found this effect is best achieved with oils as low as possible in viscosity consistent with other requirements. The desirable properties of switchgear oils coincide approximately with those of transformer oils ａnd in practice identical oils are used. Page: 2/3 Typical Characteristics Name Method Units Perfecto TR RC Appearance ASTM D1524 - Clear & Bright Specific Gravity @ 15°C / 59°F ASTM D1298 - 0.91 max Density @ 15°C / 59°F ASTM D4052 kg/m³ 895 max Flash Point - closed cup method ASTM D93 °C 140 min Breakdown Voltage IEC 60156 kV 50 min Dielectric Dissipation Factor (DDF) @ 90°C IEC 60247 % 0.3 max DBPC Concentration ASTM D2668 %w/w 0.3 Corrosive Sulphur ASTM D1275B ａnd Cigre Method TF A2.32.01 - Non corrosive Gassing Tendency IEC 60628 ul/min 30 max Resistivity @ 90°C IEC 60247 Gohm.m 200 min Interfacial Surface Tension (IFT) ASTM D971 mN/m 40 min Moisture Content IEC 60814 mg/kg 25 max Oxidation Stability after 500hrs IEC 1125 Method C - Pass Total Furan IEC 61198 mg/kg 0.1 max PCB Content ASTM D4059 mg/kg Not detectable Acidity ASTM D974 mgKOH/g 0.01 max The above figures are typical of those obtained with normal production tolerance ａnd do not constitute a specification