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Riello Sentryum UPS standing upright

Riello Sentryum UPS

Model S3U

Energy Efficiency + Cost Savings = A Smart UPS

The Riello Sentryum series offers the best combination of energy efficiency and cost savings solutions available for your power supply needs.

Maintain Critical Loads and Save Energy

The S3U Model is a transformer-free UPS available in 10-20-30-40-50-60 kVA with three-phase input and output. It applies advanced technologies such as DSP (Digital Signal Processor), dual-core microprocessor, three-level inverter circuits, and resonant control to continuously protect the critical loads without impacting downstream systems while maintaining energy savings.

A UPS With Flexible Connectivity Capabilities

The Riello Sentryum S3U has many connectivity options for advanced monitoring, including R.E.P.O. for remote emergency shutdown, programmable input and output ports, USB & RS232 ports, and parallel card slots.

Riello Sentryum UPS with cover opened

Intuitive Menus

Navigate machine functions and access data quickly and easily via the touchscreen on the UPS. The Riello Sentryum S3U can connect to any building management software or DCIM data center infrastructure for remote access and monitoring.

Understand Riello UPS Fault Codes at a Glance

The Sentryum’s status LED bar is designed to be easy to read and interpret.

Light BlueDark BlueOrangeRed
Fully OperationalBypass ModeBattery Mode
Forced to Bypass Mode
Anomaly Occurred
Fault Occurred
Lock Occurred
Load is Not Powered

Refer to your Riello Sentryum User Manual for fault codes and UPS monitoring details.

QPS offers battery replacement, maintenance plans, and service for Riello UPS in the USA.

Technical Specs

  • Power Rating: 10 – 60 kVA
  • Power Factor: 0.9 PF for more usable power
  • Topology: True on-line double conversion


  • Graphic touch screen display
  • Efficiency up to 95.5%
  • High overload capacity
  • Multiplatform communication for all operating systems


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