Information included in the design verification

The design verification serves to document compliance with the specifications

of this standard. It is comprised of 13 individual verifications.

For selected individual verifications, additional sub-verifications in subcategories

may be required. If selected verifications are not required

due to the application, the respective verification should, as a minimum

requirement, state that verification on the basis of the standard is not

required in this instance.

 

1.       Strength of materials

Verification of material strength is divided into seven sub-points. If

an empty enclosure pursuant to IEC 62208 was used and no modifications

have been made which could influence the functioning

of the enclosure, no further strength testing of the materials for this

enclosure is required. Compliance with standard IEC 62208 should

then be confirmed in the design verification. However, verification

of the resistance of the insulating materials to abnormal heat and

fire for the components used in the busbar system and other insulating

materials should additionally be provided.

a. Resistance to corrosion

Resistance to corrosion can only be verified by testing. For resistance

to corrosion, the verification should stipulate the "testing"

method, the degree of severity and the test report number.

 

2.        Properties of insulating materials – Thermal stability of

Enclosures

 

This evidence is only required for enclosures made from insulating

materials, or parts made from insulating materials mounted on the

outside of the enclosure, and which are relevant to the protection

category. Verification should state that the test was passed at a

temperature of 70 °C, for a duration of 168 h, and with a recovery

time of 96 h, and should also include the method and the test

report number/report number.

 

3.        Properties of insulating materials – Resistance to abnormal

heat and fire due to internal electric effects

 

These properties should be verified using the "testing" method on

the material used, or using the "assessment" method with the data

sheets for the basic plastic material. Verification should state that

the properties of the insulating materials meet the requirements of

the glow-wire test depending on the three intended applications:

 960 °C for parts necessary to retain current-carrying parts

in position

 850 °C for enclosures intended for mounting in hollow walls

 650 °C for all other parts

The design verification should include the test method, the result of

the test, and the test report or report number.

 

4.        Resistance to ultra-violet (UV) radiation

 

Resistance to UV radiation only applies to enclosures and external

parts of switchgear and controlgear assemblies for outdoor installation.

Verification may be provided by testing or by assessing the

data from the original material manufacturer. The design verification

should include the test method, the result of the test method,

and the test report or report number.

 

5.        Lifting

 

Verification for lifting can only be provided by testing. Verification

should state that the test was passed, indicating the maximum

number of sections that can be lifted and the maximum weight,

together with the test report number.

 

6.        Mechanical impact

 

The impact resistance of a switchgear and controlgear assembly is

verified by testing. The design verification should state the method,

the tested IK protection category, and the corresponding test

report number.

 

7.        Marking

 

There is no requirement to test markings made by moulding, pressing,

engraving or similar, as well as labels with a laminated plastic

surface. In such cases, it is sufficient to state the chosen technique

in the design verification. For all other types of marking, testing is

mandatory. The test outcome should be documented, stating the

test report number.

 

RITTAL (Standard compliant switchgear & controlgear production)