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The electrodes must clean, properly rounded and properly positioned at
the start every test. the results are doubtful, the test must repeated
with new set test objects.1%. the surface.
The electrodes are connected 175-VA(/50-Hz source (practically
sinusoidal). The solution’s
volume resistivity 400 ohms 25° This equivalent a
concentration approx 0.9 The circuit includes overcurrent relay that has a
minimum triggering delay 0.
A flat surface the test object with area least (if
possible) placed horizontal position. When the electrodes are short-circuited, the total impedance of
the circuit adjusted variable resistor for current 1.
Each electrode exerts force approx. The solution is
dropped from height mm. The entire
width both rounded edges must contact the test object. 4.215, are
placed the surface the test object, shown this figure.1 A,
for cos 0.
This test not performed with equipment rated nominal voltages V
or less.
The interval between the drops seconds.
The surface the test object moistened between the two electrodes with
drops solution ammonium chloride and distilled water.
Two electrodes, made sintered Wolfram carbide another sufficiently
corrosion-proof material and whose dimensions comply with Fig.5 seconds.
. The drop volume ±5-mm3.
A revision this testing method pending.
Non-ceramic materials are tested specified below.
There may breakdowns sparkovers between the electrodes before a
total drops have been applied.Insert 179
(Extract from the CEE Publication 17, dated 1958)
The insulating material components containing voltage-carrying parts
must resistant creepage current.0 ±0
