The invention relates to a method for testing double segments
Zinc oxide arrester insulation state, which belongs to the field of power supply establishment test technology. According to the invention, the first grounded
ammeter is connected in series with
Zinc oxide arrester lower segment, the middle connecting part between the two segments is connected with
direct current high voltage test instrument and the second
ammeter, pressurizing from the middle connecting part of the two arrester, at first observating the first
ammeter, adjusting for obtaining the leak current valve of the arrester; then adjusting the
direct current high voltage test instrument, reading current valves of the first ammeter and the second ammeter, obtaining the leak current valve of the
upper segment of the arrester from the difference of the two readings. The method of the invention can avoid removing
high voltage down-lead, without ascent, reduce the labour intensity and working danger, at the same time avoid the bother of wire change in test, and improve working efficiency. In addition, because the
middle segment wire of the double segments
Zinc oxide arrester is lower than the top of the
upper segment, it is safe and simple to test wire with a certain included angle.