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| International Standard Category: Insulating gases |
GB/T 1409-1988 Methods for the determination of the permittivity and dielectric dissipation factor of solid electrical insulating materials at power,audio and radio frequencies including metre wavelengths
固体绝缘材料在工频、音频、高频(包括米波长在内)下相对介电常数和介质损耗因数的试验方法 ;
| Category No.: | 29.040.20 | Valid Status: | superseded |
| Issued Organization: | China Electrical Equipment Industry Association | Issued Date: | 1988-01-02 |
| Implemented Date: | 1989-7-1 | Abolished Date: | |
| Superseded Standard.: | GB/T 1409-2006 Recommended methods for the determination of the permittivity and dielectric ddissipation fator of electrical insulating materials at power, udio and radio frequencies including meter w |
Superseded Date: | 2006-6-1 |
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