Rowan Elettronica 280/93 3-phase drive

The Rowan Elettronica 280/93 is a three‑phase voltage regulator (bidirectional drive) used for controlling asynchronous motors up to 70 Hp, operating on 230–460 VAC with SCR‑based phase control and tachometer feedback. Common failure points in this class of drives include burnt or tripped SCRs, degraded gate driver ICs, worn motor encoder/tachometer contacts, and overheating due to poor ventilation or overcurrent. Initial checks should verify the main power supply voltage and phase balance, inspect the SCR array for discoloration or burn marks, and review any error codes displayed on the drive panel or logged in its internal diagnostics.[oss-gpt-20b]

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