The degree of protection of electrical equipment (IK)

IK standards and scope

The IK standard applies to the protection classification of electrical equipment enclosures with a rated voltage not exceeding 72.5 kV against external mechanical collisions, and only applies to enclosures that have special requirements for external mechanical collision protection classification.

GB/T 20138-2006/IEC 62262;2002 The degree of protection of electrical equipment enclosures against external mechanical collisions <IK code>.

range

This standard applies to the classification of protection against external mechanical collisions of electrical equipment enclosures with a rated voltage not exceeding 72.5 kV.

This standard is only applicable to enclosures that have special requirements for the classification of external mechanical collision protection

1. a) The definition of the degree of protection provided by the enclosure of electrical equipment to protect the internal equipment from harmful effects caused by mechanical collision;
2. b) Mark of protection level;
3. C) Requirements for each type of logo;
4. d) Tests that should be carried out to confirm whether the enclosure meets the requirements of this standard.

The technical committees still have the right to determine the extent and method of applying this classification method in the standards they have formulated, and define the “enclosures” of the equipment under their jurisdiction. But for any designated classification, the test shall not be different from the provisions of this standard. If necessary, supplementary requirements can be added to the corresponding product standards.

For certain types of equipment, the product technical committee may specify different requirements under the premise of ensuring the same safety protection level.

This standard only specifies enclosures whose intended use can meet the requirements of the corresponding product standards in any other respects, and from the perspective of materials and processes, under normal conditions of use, the enclosure should ensure the indicated degree of protection.

This standard is also applicable to empty enclosures, as long as the enclosure surface can meet the requirements of conventional tests and the selected protection level is suitable for this type of equipment.

Definition

The following terms apply to this standard.

1. Degree of protection against mechanical impacts The degree of protection against mechanical impacts provided by the enclosure to the equipment without adversely affecting the equipment due to external mechanical collisions (level), and is verified by standard test methods.
2. IK code IK code indicates the protection level of the enclosure against harmful mechanical collisions from the outside. Marking indicates that the degree of protection of the enclosure against external mechanical collisions shall be marked with the IK code in accordance with the following regulations.

 Arrangement of IK codes

IK 05

Code letter (international mechanical protection–international mechanical protection) Characteristic number combination (00 to 10)

 

Characteristic numbers of IK codes and their definitions

Each set of characteristic numbers represents a collision energy value,

Correspondence between IK code and its corresponding collision energy f

IK code: IK00 /IKO1 /IK02 /IK03 /IK04 /IK05 /IK06 /IK07 /IK08 /IK09 /IK10

Collision energy // (J ): a /0.14/ 0.2/ 0.35/ 0.5/ 0.7/ 1/ 2/ 5/ 10/ 20

Note 1: If higher collision energy is required, the recommended value is 50J,

a- According to this standard, no protection

 

Application of IK code

Generally, the degree of protection applies to the overall enclosure. If some parts of the enclosure have different protection levels, their corresponding protection levels shall be marked.

General test requirements

Housing under test Unless otherwise specified in the relevant product standards, all housing under test should be clean, brand new and complete, and all components should be installed in place.

Verification of mechanical collision protection test

The tests specified in this standard are type tests.

The enclosure to be tested shall be hit to verify the protection of the test equipment against mechanical collisions in accordance with the provisions of Chapter 7

During the test, the tested enclosure should be installed on a rigid support base in accordance with the manufacturer’s instructions. When a collision force with an energy corresponding to the protection level of the tested shell is directly applied to the support, if the displacement is less than or equal to 0.1 mm, the support is considered to be sufficiently rigid. Other installation and support methods suitable for the product can be specified in the relevant product standards.

Test equipment

The test shall be carried out using an apparatus specified in GB/T 2423. 55-2006. The relevant product standard shall specify the applicable test apparatus type

Inverse kinematics (IK) is a physical movement method that uses the calculation of the displacement and direction of the parent object to inherit the information obtained to its child objects.

How to distinguish between IP and IK protection levels

IP stands for Ingress Protection. IEC IP protection level is an important safety protection for electrical equipment. IP and other protection level systems provide a way to classify products based on the degree of dust, water and collision resistance of electrical equipment and packaging

IK refers to the anti-impact protection grade of the equipment shell. Usually, the protection requirements of IK and IP appear together. For outdoor electronic equipment, whether it is overhead, underground or ordinary outdoor placement, corresponding IP and IK requirements are required. The IK level is determined by the impact of a pendulum in joules as a unit of free fall. For specific content, you can directly refer to the national standard: GB/T20138 Protection level of electrical equipment enclosures against external mechanical collisions (IK code)