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Test voltage
1). 500~10KV (adjustable)
2). The over-current delay relay operates when 60mA±6mA or
more has persisted in the high-voltage circuit for 2s to cut off the current,
and indicates that the specimen is unqualified
Test current: 5~60mA
Filter-paper size: Manufactured according IEC60587 figure 9,
the thickness is 0.15mm to 0.17mm
Dropping device
1). the height of dropping device is adjustable
2). flow rate:0.075ml/min~0.9ml/min (adjustable)
3). the test time can be preset
Contaminant
1). 0.1%±0.002% by mass of NH4CL analytical quality and
0.02%±0.002% by mass of isooctylphenoxypolyethoxyethanol (a non-ionic wetting
agent) in distilled or de-ionized water
2). the contaminant shall have a resistivity of
3.95Ωm±0.05Ωm at 23℃±1℃
Electrode
Top electrode and bottom electrode are made of stainless
steel with thickness of 0.5mm, the sizes are completely designed according to
IEC60587 figures 4 and 5, the distance between top electrode and bottom
electrode is 50±0.5mm
Protection measures
All parts are insulated except the electrodes and other
metal parts required by standard, and equipped with plexiglass observation
window
Judgment criteria
Criterion A: The end point is reached when the current in
the high voltage through the specimen exceeds 60mA, the over-current device
then breaks this current not before 2s, or when a specimen shows a hole due to
intensive erosion or the specimen ignites.
Criterion B: The end point is reached when the track reaches
a mark on the specimen surface 25mm from the lower electrode or when a specimen
shows a hole due to intensive erosion or the specimen ignites.
Working Power: 380V/50Hz
The high voltage tracking test apparatus is applied to tracking and erosion tests for insulating material of electronics products and household appliance according to IEC60587. The test uses liquid contaminants and inclined specimen to evaluate the resistance to tracking and corrosion of electrical insulating materials under severe ambient conditions at power frequency (48Hz-62Hz).
Under the influence of humidity and impurity environment, electrical products may cause leakage of insulation between live parts of different polarities or between live parts and grounded metal, and the resulting arc may cause breakdown and short-circuit to the electrical appliances or cause electrical corrosion of materials due to discharge damage or even ignite causing a fire. This equipment is to simulate above conditions and performs a destructive test for insulating materials, to measure and evaluate the relative tracking resistance of the insulator under the action of electric field and impurity water.
