接地测试

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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

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! F. s) A6 p  @: d3 M  J) a2 @1 |根据IEC60335-1： 2016第27.5条规定，接地电阻测试以12V，25A施加到接地端子与器具入口处（电源线除外）之间，标准上描述施加时间为直至工作稳定状态为止，大家一般测试多长时间。。

27.5 The connection between the earthing terminal or earthing contact and earthed metal
4 Y8 G: i/ `2 ]& M& P& a: r+ Kparts shall have low resistance.
7 t6 s+ i* w6 {8 C' \# U- fIf the clearances of basic insulation in a protective extra-low voltage circuit are based on
5 R8 O4 H& O- q' i  Uthe rated voltage of the appliance, this requirement does not apply to connections providing
earthing continuity in the protective extra-low voltage circuit.
These requirements are not applicable to class II appliances and class III appliances that
incorporate an earth for functional purposes.
Compliance is checked by the following test.
A current derived from a source having a no-load voltage not exceeding 12 V (a.c. or d.c.) and
equal to 1,5 times rated current of the appliance or 25 A, whichever is higher, is passed
  a  G. S: G+ `% F- G/ ~* e/ mbetween the earthing terminal or earthing contact and each of the accessible metal parts in
turn. The test is carried out until steady conditions have been established.
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The voltage drop between the earthing terminal of the appliance or the earthing contact of the
appliance inlet and the accessible metal part is measured. The resistance calculated from
6 M2 F! R; {" n# Rthe current and this voltage drop shall not exceed 0,1 Ω . The resistance of the supply cord is
4 ^! v- G; H/ U7 x: nnot included in the resistance calculation.
NOTE  Care is to be taken to ensure that the contact resistance between the tip of the measuring probe and the
' i9 B& ^% W! rmetal part under test does not influence the test results.

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