查看“︁Drop Test”︁的源代码

==Drop Test==
跌落测试，产品跌落测试，模拟产品一些便携式产品、手持式产品、较轻便方便移动例如充电器产品，需要做跌落试验，评估跌落之后会不会造成安全事故。

备注：不插电测试跌落

==UL1236 跌落要求==
[[文件:UL1236.jpg|800x91px|无框]]

==IEC 60335-2-29 跌落要求==
21.101 Battery chargers, other than '''built-in battery chargers''', having a mass not exceeding 5 kg are subjected to the test free-fall - procedure 1, of IEC 60068-2-31, which is carried out on three appliances. 

The battery chargers are dropped from a height of 1 m, each appliance being dropped from a different position. 

After the test the battery chargers shall show no damage that could impair compliance with 8.1, 15.1.1, 16.3 and Clause 29.

=== 8.1 Addition===
During insertion or removal of batteries having a battery voltage exceeding 42,4 V, protection against contact with live parts of the battery or of the battery charger shall be ensured.

===8.1.4 Addition===
For type 2 battery chargers, voltages and currents are also measured between relevant accessible parts of opposite polarity.

===15.1.1===
?
===16.3===
?

===29 Clearances, creepage distances and solid insulation===
29.1, 29.2 and 29.3 The distances specified in items 2a, 2c and 3 in Table 13 of IEC 61558-1 apply. 

For insulated winding wires complying with Subclause 19.12.3 of IEC 61558-1, there are no requirements for '''clearances''' or '''creepage distances'''. In addition, for windings providing '''reinforced insulation''', the distance specified in item 2c of Table 13 of IEC 61558-1 is not assessed. 

For '''isolating transformers''' subjected to periodic voltages with a frequency exceeding 30 kHz, the '''clearances''', '''creepage distances''' and '''solid insulation''' values specified in IEC 60664-4 are applicable, if these values are greater than the values specified in items 2a, 2c and 3 in Table 13 of IEC 61558-1.

==IEC 62368 跌落要求==
IEC 62368-1:2018
4.4.3.3 Drop tests
The following equipment shall be subjected to the drop test of Clause T.7:
* '''hand-held''' equipment;
* '''direct plug-in''' equipment;
* '''transportable''' equipment;
* '''movable''' equipment requiring lifting or handling by an '''ordinary person''' as part of its intended use, including routine relocation;

NOTE An example of such equipment is a paper shredder that rests on a waste container that requires removal of the paper shredder to empty the container.

Desk-top equipment having a mass of 7 kg or less that is intended for use with any one of
the following:
* a cord-connected telephone handset; or
* another cord-connected hand-held accessory with an acoustic function; 
* or a headset.

小于7kg，且带有可插拔连接话筒、头戴耳机类似，容易绊倒人导致风险存在的小产品，就需要做跌落测试。

==IEC 62368 跌落方法==
T.7 Drop test
A sample of the complete equipment is subjected to three impacts that result from being dropped onto a horizontal surface in positions likely to produce the most adverse results.

The height of the drop shall be:

* 750 mm ± 10 mm for desk-top equipment and '''movable equipment'''; 
* 1000 mm ±10 mm for '''hand-held equipment''', '''direct plug-in equipment''' and '''transportable equipment'''; 
* 350 mm ± 10 mm for a part acting as a '''fire enclosure''' only of desk-top equipment and '''movable equipment'''; 
* 500 mm ± 10 mm for a part acting as a '''fire enclosure''' only of '''hand-held equipment''','''direct plug-in equipment''' and '''transportable equipment'''.

The horizontal surface consists of hardwood at least 13 mm thick, mounted on two layers of plywood each 18 mm ± 2 mm thick, all supported on a concrete or equivalent non-resilient floor.

水平面由至少13mm厚的硬木组成，安装在两层胶合板上，每层胶合板厚18mm±2mm，全部由混凝土或同等非弹性材料支撑地板。


备注：不插电测试跌落

==IEC 62368 跌落判据==
4.4.3.1 0 Compliance criteria

During and after the tests:
– except for PS3,
class 3 energy sources shall not become accessible to an ordinary person or to an instructed person; and

– glass shall:
* not break or crack; or
* not expel pieces of glass greater than 30 g in mass or greater than 50 mm in any dimension; or
* pass the fragmentation test of Clause T.10 on a separate test sample; and

– all other safeguards shall remain effective.


测试后不能使危险带电部件ES3，危险运动部件MS3，危险温度部件TS3，危险辐射RS3这些变成可触及。

PS3是跟起火有关的危险源，所以跟可触及没关系，其他的3类危险源是跟可触及有关的。简单讲超过100W的会有引起火的危险，就叫PS3。

只要外壳没碎，导致内部部件可触及就没问题。