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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7 ]3 R- m) H4 P( B$ d7 Q/ {( W2 s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
parts shall have low resistance.
If the clearances of basic insulation in a protective extra-low voltage circuit are based on
, h; I# L6 n! T! b; I! v6 J* ithe rated voltage of the appliance, this requirement does not apply to connections providing
& E" u. I' y) E+ Xearthing 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.
3 B9 v; k7 \7 J8 w% t% G6 m: CCompliance 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
9 N1 Z% g4 Z% o2 T' J+ g1 P9 d' \between the earthing terminal or earthing contact and each of the accessible metal parts in
: [0 A$ Z# R/ ]: a- Uturn. The test is carried out until steady conditions have been established.

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" k9 e' d* G7 F" yThe voltage drop between the earthing terminal of the appliance or the earthing contact of the
5 f9 p) O1 y, Q3 b* r% }" M0 c3 W' {2 Qappliance inlet and the accessible metal part is measured. The resistance calculated from
5 s# P, J# ?/ j/ b' D2 U9 Hthe current and this voltage drop shall not exceed 0,1 Ω . The resistance of the supply cord is
# S: u& s. I* L  V$ [  Y* ~not 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
& ~0 W2 B' F! t7 {0 Kmetal part under test does not influence the test results.
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