UL778

JIES

广东安规检测
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小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

UL778中的Dielectric voltage-ithstand：
: {3 @  p0 P( }, q$ K: s35.1.1 A pump shall with stand for 1 minute without breakdown the application of a 60-hertz, essentially sinusoidal potential:
a)Between live parts and grounded dead metal and
b)Between the terminals of a capacitor used for radio interference elimination or arc suppression.The test potential shall be as follows:
' x0 g3 a! k1 i0 p0 _6 g0 W# y1)One thousand volts for a nonsubmersible pump rated no more than 250 volts, and no more than 1/2 horsepower(373 watt output).
- _' Y3 r$ p! ]3 u& ^" Y2)One thousand volts plus twice the rated voltage for a nonsubmersible pump rated more than 250 volts, or more than 1/2 horsepower.
& X; R1 [% w, V/ J; ^( k3)One thousand volts plus twice the rated voltage for a submersible pump.
$ Q( a. U& Z: ~
# z- ]$ Q) R* f2 o0 P35.1.2 The required test potential may be obtained from any convenient source of sufficient capacity at least 500 volt-amperes capable of maintaining the potential at the required test value except during breakdown.The voltage of the source is to be continuously variable.
Exception: A 500 volt-ampere or larger capacity transformer need not be used if the transformer is provided with a voltmeter to directly measure the applied output potential.
2 `( Q. ^6 C+ ]1 K
35.1.3 In the case of a DC pump, the test potential is to be direct current.
" i$ x' M- y$ \. N( l
看的不是很明白，那位高手幫忙指點指點。