IEC 61439

[Anonymous user]

Is there any guideline as per IEC-61439 equivalent to PTTA specification of IEC-60439 or IS-8623 that earlier we referred for panel / DBs ?

[Anonymous user]

Hi Sudhansu

The concept of TTA & PTTA are no more relevant in IEC61439. TTA & PTTA are replaced by design verifications.

An Switchboard manufacturer obliged to prove the performance and constructional characteristic by either 

1. Testing
2. Comparison with a reference design
3. Assessment

Comprehensive guidelines for each and every characteristics are very well defined in IEC61439-1 Edition 3 . For example, refer Annex L for temperature rise performance verification and refer Table 13 + Annex M for short circuit performance evaluation. Similar guidelines are also furnished for all the relevant characteristics for the corresponding performance evaluation and assessment.

Do revert back in case if you seek further details.

Regards

S.Saravanan

Principal Technical Expert