| 摘要 |
An enclosure 4 for electrical apparatus 6 has a sealable outlet 8 for partially evacuating the enclosure and a sealable inlet 9 for partially filling the enclosure with a liquid 7 having a vapour pressure at operating temperatures of the apparatus suitable to enhance electrical isolation of the electrical apparatus and suitable to provide convective cooling of the electrical apparatus. The vapour preferably provides a voltage hold-off sufficiently high for operating voltages of the electrical apparatus and has a relative permittivity sufficiently low to prevent stray capacitance in the electrical apparatus above a predetermined limit. |
