17 |
The main test
a. power frequency voltage 5min(wet/dry)
b. power frequency voltage 1min(dry)
c. power frequency voltage 10s(wet)
d. partial discharge at room temperature
e. load cycle test at constant voltage
f. impulse voltage test
g. D.C. voltage test: negative
h. salt fog test for outdoor
i. humidity test for indoor |
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a. 39KV;no breakdown
b. 50KV;no breakdown
c. 45KV;no breakdown
d. 15KV <=10pC;no breakdown and flashover
e. 23KV(heat 5h,cool 3h) 30times
f. 95 (±each 10times) no breakdown
g. 35KV,4h no breakdown
h. 11KV;no breakdown and flashover
i. 11KV;no breakdown and flashover |