Transformer-Based

The transformer-based range groups Riello’s higher-power UPS units that retain an output transformer. The transformer provides three benefits, per the FAQ:

1. Galvanic Isolation — protects load from inverter DC fault propagation
2. Voltage step-up to local distribution voltage
3. A new neutral close to the load, mitigating bad upstream neutrals (important for data-centre and IT loads)

Modern transformer-based Riello units include Master MPS (MPT in older naming), Master HP (MHT), and Master HE (MHE). Master HE in particular is positioned to combine transformer-based reliability with transformerless-class efficiency — Riello’s flagship for data-centre-scale critical loads.

Members

• Master MPS — 10–200 kVA transformer-based three-phase
• Master HP — 10–600 kVA online double-conversion transformer-based with IGBT rectifier and inverter
• Master HE — 100–800 kW flagship transformer-based three-phase

Connections

• Galvanic Isolation — defines (the core feature of the range), source: https://standbysystems.co.za/ups-batteries-questions-and-answers/

Sources

• Transformer-Based range — Standby Systems
• FAQ — Standby Systems