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

UL1236 跌落判据

试验后实验指不能触及危险带电件和危险运动部件，耐压测试能过。

31.1.1 A battery charger shall be tested as described in 31.2 and 31.3 (see 31.1.2 – 31.1.4). Following the test, the battery charger shall:

a) Not permit a probe, as illustrated in Figure 8.1 and applied in accordance with 7.7.4, to contact an uninsulated live part that may involve a risk of electric shock or a moving part that may involve a risk of injury to persons; and

b) Comply with the Dielectric Voltage Withstand Test, Section 29, with the potential applied between live parts and accessible dead metal parts.

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.

IEC 60335-2-29 跌落判据

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试验指，UL传统标准有UL的试验指）

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。