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

! a% e% h6 S( V+ e9 u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.
. ?: V; }. R1 q" F$ {/ L. G/ GIf the clearances of basic insulation in a protective extra-low voltage circuit are based on
) I/ o. a6 C0 M2 Cthe 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.
% l+ w) L! {9 q1 X' K3 wCompliance 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
; P. k3 Y& B- ^7 e/ P) G* jbetween 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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& W1 f/ r, n7 E3 i5 t8 R
1 U. h* F% m- o$ ~3 ?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
the current and this voltage drop shall not exceed 0,1 Ω . The resistance of the supply cord is
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
metal part under test does not influence the test results.

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