UL778

JIES

广东安规检测
有限公司提供：

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：
35.1.1 A pump shall with stand for 1 minute without breakdown the application of a 60-hertz, essentially sinusoidal potential:
5 b/ D; q% Y- ?" ]+ s8 f, b2 K0 U$ xa)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:
1)One thousand volts for a nonsubmersible pump rated no more than 250 volts, and no more than 1/2 horsepower(373 watt output).
8 v6 ^3 s* \1 M0 R) v& q# B2)One thousand volts plus twice the rated voltage for a nonsubmersible pump rated more than 250 volts, or more than 1/2 horsepower.
" I; K5 q) |( e8 q6 e( _3)One thousand volts plus twice the rated voltage for a submersible pump.
' o) A  b4 T9 p" D
' K; w( X3 H2 M+ R6 V35.1.2 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.

35.1.3 In the case of a DC pump, the test potential is to be direct current.

# }9 S1 c1 W: g/ j1 E看的不是很明白，那位高手幫忙指點指點。