High voltage is applied between the two parts across the insulation being tested, such as the primary circuit and metal enclosure of the equipment under test (EUT).

高压施加于被试的两个相互绝缘的部件之间，例如被试设备的主电路与其金属外壳。

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The impulse test equipment shall be calibrated by means of a peak detecting electronic voltmeter connected directly between the electrode head and ground.

脉冲火花机的校准是把数位电压表直接接在测试电极和地之间。

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Then, the test equipment and experiment is introduced. Through experiment, we get the relation between velocity and filter pressure drop.

介绍了试验设备及测试方法，通过试验得出过滤风速和压力损失变化关系。

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