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Resolution:
The maximum wire cross section provided in the drive user manual corresponds to the maximum mechanical capability of power terminals. Whereas the minimum wire cross section provided corresponds to the minimum wire cross section to be in accordance thermally with different drive certifications like the UL standard.
Drives have been tested and validated with the minimum wire cross section to be sure the external insulation wire temperature will not exceed 70°C as required by UL standard. So it can work mechanically if you use a wire cross section below our recommendations but in this case you are out of the UL standard requirements.
Another element to take into account in the wire sizing is the maximum output transient current (150% of drive nominal current during 60s): 132A in Normal Duty and 127.2A in Heavy Duty.
If this article does not answer your question, check out our FAQ database that has answers to more commonly asked questions:Frequently Asked Questions - Schneider Electric (se.com)If this FAQ did not solve your issue, you can call us at 1-888-778-2733 Option 2 and then 4 or e-mail us at drive.products.support@se.com to create a case with our Technical Support Team.If you are not located in North America, please contact your local Customer Care Center for assistance:Support | Schneider Electric Global (se.com)
Released for: Schneider Electric Canada
