DSH 576 Abnormal operation

小米

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

DSH 576 * Z3 W/ A) c# ?/ W

Abnormal operation * U, _8 u! W" z( I" j( o# L  A

19.11 " i& Q% l% z* y5 F9 J& g( {

60335-2-60(ed.3)

Question:
9 J- J- B) T! G. Z& K- KSome whirlpool baths incorporate a telephone set. Therefore they incorporate a connection to the telephone network, in which it is used voltages exceeding 50 V between the signal lines. Any way, the voltage measured from any line to earth is less than 12 volts. Taking into account that sub-clause 22.35 requires that "parts such as switches and controls accessible to the user in the bath shall only be supplied at safety extra low voltage not exceeding 12 V":
- should the signal lines be insulated considering the voltage referenced to ground, in which case the requirement for insulation will not be stringent?
or
- should the voltage between the lines be considered instead, in which case the insulation requirements will be more stringent?
Decision:
7 ]( _$ O9 o+ ~# qIf the knobs are directly connected to the telephone circuit, in such a way that the telephone line voltage supply the knobs, this construction is not accepted.

6 E: p8 i8 |- M# b