220KV Current Transformer

1. General 220KV Current Transformer, Outdoor,KEMA Type Test,Oil-immersed hair-pin type, used for metering and protection, single phase, applying to highland area 2. Standards IEC Standards: IEC 60044-1<Current Transformer> National Standard: GB1208<Current Transformer> GB311.1<Insulaiton co-ordination for high voltage transmission and distribution equipment> 3. Service Condition Ambient Temperature: -40 +40°c Altitude: LVB1-220(W1,W2,W3) less than 1000m LVB1-220GY(W1,W2,W3) less than 3500m Environment Pollution Level: II, III, IV 4. System Condition System Neutral Earthing Method: Effectively Earthed 5. Structure Feature It is top-head oil/paper insulation type product. The primary winding is made of multi turn soft copper strand cable which winds on the secondary windings uniformly, or is made of Aluminum (or copper) tube which goes through the center of secondary windings, it will improve the short circuit withstand ability. The product is compact and use less transformer oil. The primary insulation is wound from high voltage cable paper, and is placed several capacitor screen of voltage division in the primary insulation, which can improve electric field distributing and decrease the consumption of insulation material. It will be immersed with transformer oil after desiccating under vacuum. It has advantages of stable and reliable performance of insulation, rich successful experience, a long life time and convenient maintenance.Perfect fluidity performance of transformer oil is good for heat dissipation, it also has self recover ability for the failure of partial discharge caused by air bubble and dust.The current ratio can be changed easily by change the connection method of connecting plate on oil conservator to series or parallel connection.