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The solution’s
volume resistivity 400 ohms 25° This equivalent a
concentration approx 0.
A revision this testing method pending.
Non-ceramic materials are tested specified below. The drop volume ±5-mm3.1%.215, are
placed the surface the test object, shown this figure.
Each electrode exerts force approx.
.Insert 179
(Extract from the CEE Publication 17, dated 1958)
The insulating material components containing voltage-carrying parts
must resistant creepage current.1 A,
for cos 0.9 The circuit includes overcurrent relay that has a
minimum triggering delay 0.
The interval between the drops seconds. the results are doubtful, the test must repeated
with new set test objects. When the electrodes are short-circuited, the total impedance of
the circuit adjusted variable resistor for current 1.
The surface the test object moistened between the two electrodes with
drops solution ammonium chloride and distilled water.0 ±0. 4.
The electrodes are connected 175-VA(/50-Hz source (practically
sinusoidal).
A flat surface the test object with area least (if
possible) placed horizontal position.
Two electrodes, made sintered Wolfram carbide another sufficiently
corrosion-proof material and whose dimensions comply with Fig.5 seconds. the surface. The entire
width both rounded edges must contact the test object.
The electrodes must clean, properly rounded and properly positioned at
the start every test.
This test not performed with equipment rated nominal voltages V
or less. The solution is
dropped from height mm.
There may breakdowns sparkovers between the electrodes before a
total drops have been applied
