4.1.6 Preventive Test for Aerial Devices with Insulating Booms
Preventive test for aerial devices with insulating booms includes the power-frequency voltage-withstand test and leakage current test for insulating working bucket,power frequency voltage withstand test and leakage current test for insulation arm,the power-frequency voltage-withstand test and leakage current test for the entire aerial devices with insulating booms,and the breakdown strength test for insulating hydraulic oil,and the test period should be half a year.(https://www.daowen.com)
