Live-working washing agent is used to remove the insulators’ contamination away under the insulators in charge state.Temperature characteristics of live-working washing agents and whether the contamination will influence the electrical characteristics of live-working washing agents are problems which should be paid more attention to.Hence

we experimentally tested the electrical performances of live-working washing agents under the condition of adding different quality fractions of the contamination

measured the pure state

dielectric loss term

relative dielectric constant

volume resistivity

and power frequency breakdown voltage

and compared and obtained electrical performance and their temperature chara

cteristics of four kinds of live-working washing agents.In addition

volume resistivity and power frequency breakdown voltage under different amount of contamination were obtained.The test results show that the dielectric loss factor will increase with the increase of temperature.The dielectric loss factor of live-working washing agents No.1 and No.3 is relatively larger

the values at 50 ℃ exceed the limit value of standard.The relative dielectric constant of four samples will decrease with the increase of temperature.And the volume resistivity of pure state is larger at 20 ℃

and will decrease with the increase of temperature.The volume resistivity will decrease by an order of magnitude with mass fraction 0.5% mixed contamination

but still more than 1.0×1012 ?·cm.While the mass fraction is 0.5%

4

.5%

and the volume resistivity subtly changes.Moreover

the power frequency breakdown voltage with 0.1%

0

.5% mass fraction drops more noticeably compared with purity agent

and insignificantly drops with 1%

3

% mass fraction.