PTC UL1434标准

琥珀流云

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

请问如下这个测试怎么做啊
3 j( Z/ M6 P$ E7 u2 e2 Z0 I$ W18 Limited Short-Circuit Test
18.1 General
" l1 j1 K$ B# l0 u3 h) ^18.1.1 Following the test specified in 18.2.1 or 18.3.1, a thermistor shall:
- R& q/ m$ Y0 ^6 P0 U: R( ea) Comply with the requirements in 11.1.2 or be in a permanently high resistance state; and
b) Complete the test without igniting the cotton indicator or opening the ground fuse described in
18.1.4 and 18.1.5.
' c$ f5 f6 u- {3 B18.1.2 When the results of the Limited Short-Circuit Test on the thermistor itself comply with 18.1.1, the
& p  P* g5 }! ktest is not required to be repeated during the investigation of the end product.
18.1.3 Three samples of a control thermistor are to be subjected to this test. The test is to be conducted
at rated voltage (Vr).
) o, H: ]! C; G1 S6 t18.1.4 A ground fuse is to be connected between the metal enclosure, metal mounting surface, or metal
screen described in 18.1.5 and the unswitched line to indicate an arc-over to the enclosure or mounting
surface. Where each line is switched, the fuse is to be connected between the enclosure, mounting
surface, or screen and the live pole least likely to arc to ground. The fuse is to be a 3.0 A nontime-delay
fuse having a voltage rating not less than the rated voltage (Vr) of the thermistor.
18.1.5 Cotton not less than 12.7 mm (1/2 in) thick is to surround a metal screen enclosing the thermistor
at a distance not more than 12.7 mm from all parts of the thermistor.
18.1.6 The cotton is to be surgical cotton, such as commonly used for medical purposes.