Drop Test

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

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.

跌落以后，要防止触电，不能让人触电。

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

IEC 60335-1

跌落后，防尘防水不要影响，例如，产品规格标识是IP2X就是用如下试验指检查（IEC标准基本都是一样的实验指）

所有符合安规标准的产品都是IP20，这是最基本的要求。所以，在此级别以上的才算防尘防水要求。

IP1X是手背不能进入，IP2X是试验指不能进入

IP3X是2.5mm试验针

IP1X是50mm开孔不能进入

IP2X是12.5mm开孔不能进入

IP3X是2.5mm

16.3

IEC 60335-1

跌落后，不能影响耐压和接触电流。

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.

跌落后，不能影响电气间隙和爬电距离。

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。

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。