LB7-220 Outdoor Oil-Immersed Current Transformer
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Product Description
- Product Description
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Purpose
It is outdoor, single phase and oil immersed hair-pin type current transformer, whichis used for metering and relay protection of220kv,50 or 60Hz system.Standards
IEC Standard:IEC60044-1《Current Transformer》 National Standard:GB1208《Current Transformer》
GB311.1《Insulation co-ordination for high voltage transmission and distribution equipment》Service condition
Ambient temperature:-40~+40℃
Altitude:LB7-220(W1,W2,W3) less than 1000m
LB7-220GY(W2) less than 3000m
Environment pollutionlevel:ⅡI、ⅢI、IVSystem condition
System Rated Voltage:220kV System Highest Voltage:252kV
System Rated frequency:50Hz or 60Hz
System neutral earthing method: effectively earthedStructure feature
It is oil/paper insulation system, the primary insulationis wound from high voltage cable paper, and is placed several capacitor screen of voltage divisionin the primary insulation, which can improve electric field distributing and decrease the consumption ofinsulation material. It will be immersed with transformer oil after desiccating under vacuum. It has advantages of stable and reliable performance ofinsulation,
rich successful experience, along life time and convenient maintenance.
• Perfect fluidity performance of transfonmer 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 series or parallel connection.
• Hermetically sealed stainless steel metallic bellows is installed on the top, which protects the trans former oil from moisture and extend the life time, also there is a oil level gauge on the bellows for observing the changing of oil volume .
• There is amulti function oil drain valve on the base, which makes it more convenient for sampling and draining.
• There is a individual terminal of earth screen in the terminal box.
• If you have special requirement for our product, please add note explanation
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