AUTOTRANSFORMER.3F.690-480V63KVA

AUTOTRANSFORMER.3F.690-480V63KVA

AUTOTRAFO.3F.690-480V63KVA

This appears to be a product code or model number for an autotransformer.

Let me know if you'd like me to elaborate on what this might mean based on common conventions in electrical equipment naming.

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