Riello UPS Multi Sentry MST (160 and 200 kVA current; 10-125 kVA superseded)

Riello's transformerless monolithic three-phase UPS, current only at 160 and 200 kVA since Sentryum arrived

Riello UPS Multi Sentry MST (160 and 200 kVA current; 10-125 kVA superseded) is one of 22 UPS systems tracked in the SecondWatt catalogue, each with specifications, lead times and indicative secondary-market pricing.

Riello Multi Sentry MST dossier: 160 and 200 kVA at unity power factor, VFI-SS-111, 96.5% efficiency, used-market findings and a full inspection checklist.

Why it matters

Multi Sentry is the cleanest published example of cabinet-versus-battery pricing in the category. Critical Power Supplies sells two distinct MST 100 SKUs, one with an internal battery set and one explicitly without internal batteries, and Energom states for the MST 100 that the unit has an internal battery compartment but the battery price is not included. That is the rule written into a manufacturer channel's own catalogue.

Who buys it

UK and European facilities managers replacing or extending an installed Multi Sentry fleet, and dealers holding used MST stock for that market. Buyers below 160 kVA are effectively shopping the Sentryum successor line instead. North American buyers should not be routed here at all, since the product carries no UL listing and no US service channel.

Role in the data center

Room-level or facility UPS in European computer rooms and small data halls, paralleled up to six ways for redundancy.

Key specifications

Technical summary

Current ratings: MST 160 at 160 kVA/160 kW; MST 200 at 200 kVA/200 kW, unity power factor Legacy ratings: MST 10 to 125 kVA, superseded by the Sentryum line Input: 380/400/415 V three-phase plus neutral, 40-72 Hz, input PF 0.99, iTHD at or below 2.5% Output: 380/400/415 V three-phase plus neutral, plus or minus 1% regulation Efficiency: 96.5% double conversion; up to 99% in eco and Smart Active Topology: transformerless monolithic, three-level NPC inverter Parallel: up to 6 units, distributed parallel redundancy with Closed Loop architecture Dimensions: 850 x 1050 x 1900 mm on MST 160-200; 135-460 kg without batteries Battery: VRLA AGM, GEL, NiCd, lithium-ion, supercapacitors; 240 VDC nominal on MST 160/200 Standards: IEC EN 62040-3 VFI-SS-111; IEC EN 62040-1; IEC EN 62040-2 class C2

Pricing and availability

Trend: up Lead time, new: Quote-only; UK dealers show MST 160 and 200 in stock with limited availability. Lead time, used or refurbished: 2-8 weeks through UK and European dealers. Warranty, used: 1-year typical from refurbishment dealers.

Lifecycle and maintenance

Static UPS cabinets serve roughly 15 years, the figure Mitsubishi publishes directly alongside a lifecycle-parts-or-replace decision at 10-12 years. The wear items are documented: Eaton rates DC bus capacitors at 7 years of continuous duty and up to 10 under favorable conditions, while Vertiv field data gives 6 years for capacitors and 5-6 years or 40,000-50,000 hours for cooling fans. Batteries turn over far faster, at 3-5 years for sealed VRLA and 12-15 for flooded cells. Service life extension programs rebuild the power train inside the original shell, which is why cabinets routinely outlive their electronics.

Common failure points

• Battery strings — VRLA capacity fades below 80% of nameplate and takes the ride-through with it
• DC bus capacitors — Silent open-circuit loss, or a short that pops and sprays electrolyte across adjacent boards
• Cooling fans — Overheating transfers the load to bypass and leaves it unprotected
• Air filters and dust — Restricted airflow raises internal temperature and shortens capacitor life
• Static bypass switch — Failure to transfer strands the load during maintenance or overload
• Controls obsolescence — Discontinued display and logic boards turn a routine repair into a scavenger hunt

Inspection checklist

Battery age — sealed VRLA turns over at 3-5 years per Eaton lifecycle guidance; assume a full string past that Battery capacity — reject any string below 80% of nameplate capacity under IEEE 1188 practice Battery impedance — ohmic readings above 20% of the commissioning baseline condemn the cell Float voltage — verify 2.23-2.27 VPC at 25 degrees C; float current above 3x steady state flags thermal runaway Intercell connectors — thermal image every joint; a delta above 5 degrees C against neighbors triggers a capacity test DC bus capacitors — Eaton rates 7 years of continuous duty (10 optimal); Vertiv field data gives 6 years at 45,000-50,000 h Cooling fans — Vertiv field data gives 5-6 years or 40,000-50,000 hours; listen for bearing noise at the intake Air filters — pull every filter; a clogged element is the best single proxy for a cabinet that ran above 25 degrees C Load bank test — run 100% and 50% load bank steps; load banking is the de facto acceptance standard in this channel Static bypass — transfer to bypass and back under load 3 times; verify the SCR assembly and breaker interlocks Battery inclusion — get cells, cabinets and racks in writing; a battery package can reach 76% of a 30 kVA class deal Firmware and cards — verify current firmware and a working network card per Eaton's 11-point used-UPS guidance Lifecycle stage — check OEM support status; Mitsubishi's 4-stage table is the only dated public one in the category Documentation — manual, factory startup report and service history; Eaton flags 7-10 year units for capacitor work Removal conditions — verify rigging path, door widths and shutdown window; a 225 kVA cabinet runs 3,605-4,805 lb

Procurement channels

UK and European dealers and auction houses carry used MST stock, generally unpriced. No North American refurbishment dealer stocks the line; Gruber Power's refurbished brand list contains no Riello.

Regional notes

IEC 400 V product not offered in North America. Riello's UL-listed products are Sentryum, Master HP UL, Master HP FC UL and Sentinel Pro2 UL, and US distributor lead times on those run 4-6 weeks for Sentryum and Master HP against 10-12 weeks for MultiPower2.