Victron Isolation Transformer 3600W 115/230V connections

This is ITR040362042, the manually configured 3600 W model, not the automatic-input variant. The manufacturer manual gives 115/230 V input, 120/240 V output, and 32 A / 16 A ratings respectively. The planner’s default is the 230 V, 16 A arrangement. The transformer changes voltage configuration, not frequency.

The primary INPUT L/N/PE and secondary OUTPUT L/N/PE are distinct. Power crosses magnetically; there is no conductive primary-to-secondary line or neutral path. Afloat, shore earth remains isolated from the vessel earth. Follow the manual’s secondary neutral-to-earth link so downstream protective devices have the intended fault path. This is different from removing the earth wire from a conventional shore connection.

Installation pages 5–9 identify separate input and output jumper settings, the secondary neutral/earth link, enclosure grounding and cable glands. Check both voltage configurations against the actual shore supply and vessel distribution. Never move jumpers on an energized transformer. The special shore-to-vessel earth bridge is for the specified out-of-water maintenance/storage condition, not the normal afloat arrangement.

Soft start limits startup inrush; it does not replace feeder overcurrent protection or downstream leakage protection. Keep the IP21 enclosure dry and ventilated. The fan increases speed with temperature and thermal protection stops operation if it overheats. Verify output voltage before connecting sensitive loads, and investigate repeated thermal shutdown by checking load and cooling clearance.