What standards should be met for the impact resistance of the casing of PC materials for rural lighting ready boards in Africa? Under the impact of a heavy object weighing how many kilograms, there is

Impact resistance standards and heavy object impact parameters for PC lighting ready board enclosures in rural Africa

1、 Core Execution Standard (Common IEC System for African Market)

1. Mechanical impact classification standard for shell: IEC 62262 (equivalent to GB/T 20138) IK anti-collision level; Supporting test methods IEC 60068-2-75

2. General specification for household distribution cabinets: IEC 61439 Requirements for low-voltage complete sets of enclosures

3. General mandatory level for outdoor pole mounted ready boards in African power grids: IK10 (20J impact energy). Outdoor pole mounted and wall mounted lighting ready boards in rural Africa are frequently impacted by livestock, stones, and agricultural tools. Local power bidding requires IK10 and does not allow the supply of low-level products such as IK08/IK09.

2、 IK10 corresponds to heavy object impact parameters (directly answer weight and judgment)

1. Specifications of experimental equipment

IK10 adopts a 5kg standard pendulum (hard steel impact head), with a drop height of 400mm and a strict impact energy of 20J.

2. Qualification assessment (no deformation, no cracking required)

After a single point impact of 5kg pendulum 20J, the box must simultaneously meet the following requirements:

1. The shell has no cracks, no white or brittle cracks, and no penetrating damage;

2. Impact induced permanent deformation ≤ 1mm, without irreversible collapse or warping;

3. The doors, locks, and hinges open and close smoothly, and the IP waterproof and dustproof rating does not fail;

4. Internal components are not damaged by compression.

Addendum: Low level comparison (not suitable for outdoor activities in rural Africa)

IK08: 2kg pendulum, 5J, only for indoor use, prone to cracking outdoors;

IK09: 2.5kg pendulum, 10J, usable within urban walls, not up to standard in rural outdoor areas;

IK10: 5kg pendulum, 20J, the only compliance level for outdoor use in rural Africa.

3、 PC material body matching impact index (material threshold)

Only meeting the impact requirements of IK10 structure is not enough. PC raw materials need to meet the following standards:

1. Impact strength of simply supported beam gap (at room temperature of 23 ℃): ≥ 60 kJ/m ²; Outdoor weather resistant modified UV-PC is recommended to be ≥ 70 kJ/m ²;

2. Impact strength at low temperature -20 ℃ ≥ 35 kJ/m ² (due to low nighttime temperatures and large temperature differences between day and night in Africa, ordinary PC is prone to brittleness at low temperatures);

3. The injection molding wall thickness of the box body should be ≥ 2.5mm, and the reinforcing ribs of the corners, door locks, and inlet should be ≥ 3mm. Otherwise, a 5kg impact may cause local indentation and cracking.

4、 Key Points for Landing Procurement/Production

If the customer's bidding documents specify "outdoor rural lighting box", it must be inspected and accepted with a 5kg weight impact and 20J IK10;

2. Pure PC is superior to ABS+PC blends, and the impact strength of the blend deteriorates faster after exposure to sunlight aging in Africa;

3. The test covers all weak points: the corners of the door panel, the locking position, the side walls of the box, and the openings for the inlet and outlet lines. Each point must be impacted by a 5kg pendulum without cracking or deformation.

summary

The mandatory impact resistance level of the PC lighting ready board shell in rural Africa is IK10. A 5kg standard steel pendulum is used to complete a 20J energy impact. After the test, the box body is qualified if there is no cracking or obvious permanent deformation.