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Goals and Symptoms
Why does ATS48 need indepent control supply CL1 & CL2 ? On the other hand, how the ATV does not have an indepent control supply as ATV48 has ?
Causes and Fixes
It's due to the function of the product, the ATV control board is supply by the DC bus and you can program it without start order. For ATS, there is no DC bus but only thyristors command and you need to have a separate suplly for the control.