长期以来，根据预防性试验和油中溶解气体的气相色谱分析结果判断变压器的绝缘状况，对防止事故的发生起到了很大作用。
The judgment of transformer insulation condition, which is based on preventive test and DGA, has played an important role of accident prevention for a long time.
在设计SF_6气体绝缘变压器时必须充分考虑这一点。
This must be considered in the design of SF6 gas-insulated transformer.
油中溶解气体分析是判别变压器内部绝缘状况及发现内部故障的重要手段。
Dissolved gas analysis (DGA) is an important method to judge the insulation condition and find out fault inside transformer.
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