> Design verification
· Increased requirements for insulating materials and transient overvoltages withstand tests.
· Temperature rise verification:
ü Verification by test of each functional unit loaded alone with its rated current
ü Clear methods for the selection of representative samples of an Assembly system to be tested
ü Test done in 4 steps: individual functional units, main and distribution busbars, and complete
Assembly
ü Heating resistors only allowed to simulate circuits adjacent to a circuit under test
ü Possible verification by comparison with a tested design under strict conditions, including derating
ü Exemption of test (calculation) only allowed up to 1600 A instead of 3150 A under strict conditions,
including a 20% derating.
· Possible short-cricuit withstand verification by comparison with a tested design under strict
condition
· 200 operating cycles instead of 50 for locking, interlocking and withdrawable parts
· Lifting test (from IEC 62208)
· Corrosion resistance test for metallic parts (from IEC 62208).
> Routine verification
ü More detailed list of the verifications
ü More severe requirements for clearances
SCHNEIDER ELECTRIC
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