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Each electrode exerts force approx.
Two electrodes, made sintered Wolfram carbide another sufficiently
corrosion-proof material and whose dimensions comply with Fig. 4.1%. The solution is
dropped from height mm.Insert 179
(Extract from the CEE Publication 17, dated 1958)
The insulating material components containing voltage-carrying parts
must resistant creepage current. When the electrodes are short-circuited, the total impedance of
the circuit adjusted variable resistor for current 1.1 A,
for cos 0.
This test not performed with equipment rated nominal voltages V
or less. The solution’s
volume resistivity 400 ohms 25° This equivalent a
concentration approx 0.5 seconds.
A revision this testing method pending.
A flat surface the test object with area least (if
possible) placed horizontal position.0 ±0.
The surface the test object moistened between the two electrodes with
drops solution ammonium chloride and distilled water.
.
The electrodes are connected 175-VA(/50-Hz source (practically
sinusoidal).
The interval between the drops seconds.9 The circuit includes overcurrent relay that has a
minimum triggering delay 0. the results are doubtful, the test must repeated
with new set test objects. The drop volume ±5-mm3.215, are
placed the surface the test object, shown this figure. the surface. The entire
width both rounded edges must contact the test object.
Non-ceramic materials are tested specified below.
There may breakdowns sparkovers between the electrodes before a
total drops have been applied.
The electrodes must clean, properly rounded and properly positioned at
the start every test
