A high voltage insulator monk water-based measurement method.
1 the static contact Angle method (
The CA method)
The static contact Angle method, namely through direct measurement of solid surface balance static contact Angle of water droplets to reflect the status of the material surface hydrophobic.
Through the static contact Angle measuring instrument, measuring microscope or photographic method to measure the size of the static contact Angle 0.
The volume of water (
4 mg - namely water weight
The sample (s), each need five static contact Angle of water droplets.
Hydraulic classification method (2
Hydraulic classification method is to use hydrophobic classification to represent the status of the solid material surface hydrophobic.
The material on the surface of the hydrophobic state can be divided into 6, respectively for HCh -
HC6o HCl level corresponding to the surface of hydrophobic strong HC6 level corresponding to the hydrophilic surface completely.
Monk aqueous grading of high voltage insulator measure and the requirement of water jet device is as follows: a)
Sprinkler nozzle sample (s) from 25 cm, spray 1 per second, a total of 25 times, after the water surface water flow.
Jet direction as far as possible the sample (s) is perpendicular to the surface, hydrophobic classification the HC value read should be completed within 30 s at the end of the water.
The amount of water jet set all the watering can, at 0.
7 mh lml;
The jet Angle is 500 -
Jet Angle can be used 25 cm distance made a newspaper from the nozzle, the injection direction is perpendicular to the newspaper, 10 - water
15 times, the formation of wet spot diameter in 25 cm -
35 CMDL/T 864 - a - 2004 method.
Four criteria for A.
One monk water static contact Angle measurement on the surface of the composite insulator
0 and hydrophobic sizing HC value.
Compound of high voltage insulator umbrella skirt sheath material shall meet: a)
The static contact Angle _31000 0, 0, ->
The high voltage insulator general shall be the HCl - factory
Levels HC2, and HO, the sample (s) of no more than one.
2 loss characteristics of hydrophobic standard environmental conditions in the laboratory, the sample (s) will be 5 pieces of clean put in containers of water immersion 96 h, water sample (s) shall ensure that be completely submerged.
Will try out, get rid of the surface of the water, with filter paper blot residual moisture.
Then choose 3 try to taste, measuring the static contact Angle 0 and HC value, the other two try only measured HC value.
Each high voltage insulator measurement process should be completed within 10 min.
Try should satisfy: a)
The static contact Angle, 8390, 00,;
The suspension insulator should be HC3 commonly - factory
Levels HC4, and HC5 sample (s) of no more than 1;
Of high voltage insulator should be HC4 commonly - operation
3 migration characteristics of hydrophobic sequence measure the static contact Angle 0 and HC value, the other two try only measured HC value.
Try should satisfy: a)
The static contact Angle of 0031100, 00;
The high voltage insulator should be HC2 commonly - factory
HC3 level and HC4 -
The sample (s) of no more than 1 HC5 level;
Already running high voltage insulator should be commonly HC3 -
HC4 level and HC5 -
The sample (s) of no more than 1 HC6 level.
4 hydrophobic recovery time after finishing the measurement, the sample (s) removed from the water, measure the hydrophobic recovery to A.
Article 1 the hydrophobic hierarchical levels of time, to output high voltage insulator and run high voltage insulator hydrophobic recovery time should be less than 24 h.
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