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~1  Normal Environment Condition
1) The altitude does not exceed 1000m
2) The ambient temperature is between -30°C to +40°C, the daily mean temperature is no greater than 30°C.
3) The daily mean relative temperature is no greater than 95%.The monthly mean relative temperature is no greater than 90%.
4) The installation area should be without the dangerous mediums which affect the conductive propertied and the insulating performance of the products, such as steam ,gas, chemical corrosive deposit, salt spray, dust, dirt, and so on.
5) There should be no frequent vibration and serious jolt.
 
2  Special Environment Condition
1) The altitude of high prototype products is more than 3500m.
2) The outdoor products can endure the medium of steam, gas, chemical corrosive deposit, salt spray, dust, dirt, and so on.
 
3  Executive standard
GB 311.1-1997   Insulation Co-ordination of HV Equipment for Power Transmission and Transformation
GB/T 7354-2003 PD Inspection
GB/T 4109-1999 Technical standard of HV bushing
GB/T 16927-1997 Technique of HV test
JB/T 10305-2001 Technical Requirement of Organic Material Support Insulator for 3.6-40.5kV HV Equipment
DIN 16901 The Tolerance and Acceptance Requirements of Vertical Dimension for Plastic and Molded Parts
 
4  Dimension

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