Sentryum is the third generation of transformerless online uninterruptible power supplies manufactured by Riello. It enhances the successful Multi Sentry series and was designed in response to substantial consumer input. This series changes what it means to have flexible power protection by giving you three cabinet sizes to meet the needs of small data centres and mission-critical applications.

• Compact (CPT) – 1 battery string in a 0.25m2² footprint (10-20 kVA only)
• Active (ACT) – 2 battery strings in a 0.35m2² footprint
• Xtend (XTD) – 3 battery strings in a 0.4m2² footprint

Sentryum is made with components engineered to operate flawlessly at temperatures as high as 40 °C. These include a dual-core DSP processor and high-frequency, three-level inverters (18 kHz). In online double conversion mode, Sentryum delivers full-rated power (kVA = kW 1pf) with remarkable operating efficiency of up to 96.5%. Available with three-phase/single-phase input, single-phase output (S3M), or three-phase input and output (S3T), the UPS's control technology lowers harmonic voltage distortion (1% at resistive load and 1.5% for non-linear load). The Sentryum also has a high overload (125 per cent for 10 minutes and 150% for one minute) and short-circuit capacity (270% for 200 ms and 150% for 300 ms), allowing it to handle sudden peak loads without switching to bypass.

Install up to eight UPSs in parallel to increase capacity or add redundancy. A closed-loop arrangement ensures the UPS continues to function even if the connecting cables are severed. A revised 5-inch colour touchscreen display panel presents vital UPS measurements and operating states in a transparent manner. A unique new LED status indicator automatically changes colour (light blue, dark blue, yellow, and red) based on the UPS's mode of operation and state. The Sentryum line is compatible with sealed lead-acid (VRLA), AGM, GEL, open vent, and nickel-cadmium batteries, as well as supercapacitors and lithium-ion batteries as alternate backup sources. It integrates advanced battery management systems, such as deep discharge protection and recharges voltage correction, to provide the highest performance and most extended lifespan. For applications requiring longer runtimes, 20 A battery chargers are available.

The Sentryum is equipped with USB, RS232, and RJ10 connections, in addition to many slots for parallel and network communications cards. It works with all networking and management software made by Riello UPS, such as PowerShield3 and PowerNetGuard.

Please Note: All images are for illustrative purposes only