Transformer-Based UPS Inverter
Q: What does transformer-based UPS inverter mean?
A: Historically all UPS systems were built with an inverter output transformer. The transformer served two functions:
- Voltage step-up — converting the inverter rail to 220 / 400 VAC supply for South African distribution standards
- Galvanic Isolation — isolating the load from the UPS battery, protecting against fault propagation
Riello’s modern transformer-based units — Master MPS (referred to in the FAQ as MPT), Master HP (MHT), and Master HE (MHE) — add a third benefit: a new neutral close to the load, drastically reducing the effect of bad upstream neutrals on data-centre, IT, and software loads.
Master HE is positioned as combining transformer-based reliability with high efficiency and small footprint — installable against a wall, requiring only front access for service plus 500 mm clearance above for fan airflow.
Connections
- Galvanic Isolation — referenced, source: https://standbysystems.co.za/ups-batteries-questions-and-answers/
- Master MPS — referenced, source: https://standbysystems.co.za/ups-batteries-questions-and-answers/
- Master HP — referenced, source: https://standbysystems.co.za/ups-batteries-questions-and-answers/
- Master HE — referenced, source: https://standbysystems.co.za/ups-batteries-questions-and-answers/