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电 气 性 能 Dielectric Properties
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绝缘电阻
Insulation
Resistance
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常态下 Under normal
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MΩ
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GB/T5130
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≥1.0×106
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浸水（24+1）h后
After Immersion for24+1h
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≥5.0×104
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电气强度
（于90℃+2℃变压器油中1min）
Dielectric strength in transformer oil at 90℃ for 1 min
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kv/mm
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≥14.2
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3248环氧玻璃布层压板平行层向耐电压
（于90℃+2℃变压器油中1min）
Proof voltage in transformer oil at 90℃ for 1 min
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KV
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≥45
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介质损耗因数（于浸水后，1MHz时）
Dielectric loss factor after immersion at 1MHz
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≤0.04
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介质常数（于浸水后，1MHz时）
Dielectric loss Constant after immersion at 1MHz
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≤5.5
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表面电阻率
Surface Resistivity
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常态Under normal
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MΩ
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GB/T1410
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≥1.0×107
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浸水（23+2℃/24h）
After Immersion of 23+2℃ for 24th
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≥1.0×105
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体积电阻率
Volume Resistivity
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常态 Under normal
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MΩ.m
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≥1.0×105
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浸水（23+2℃/24h）
After Immersion of 23+2℃ for 24th
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≥1.0×103
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相比电痕化指数
Comparative Trackling Index
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GB/T4207
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≥200
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