Modular UPS Systems

UPS capabilities are among the most critical for data centers as they have been among the most vulnerable and troublesome when a failure occurs. Any power failure can have a devastating impact on mission-critical computers, communications and data, resulting in costly downtime. While long term operational expense is important, overall system TCO must be considered, especially in the context of evolving power requirements. With the escalating demand for space, power and cost constraint in Data Center facilities, today’s owners and operators have turned to modular designs to gain the flexibility and cost efficiencies they found essential. Modular infrastructure allows for swift deployment of power equipment, slender construction, easy retrofitting and the ability to expand only as needed and also ensure that critical loads remain securely protected from blackouts and other mains electricity problems.

In data center environments modular UPS units have become popular as a way to limit interruption of operations for maintenance or replacement. Modular UPS recently has taken a big leap forward with the development of technological advancements like controller redundancy etc those eliminates single points of failure and downtime during maintenance while significantly easing installation. Normally, a modular UPS system will contain at least one extra module for redundancy beyond the critical-load capacity needed. If any individual module fails or otherwise requires maintenance, it can be swapped out without interfering with any operations and without transferring the load to bypass. The remaining modules continue to supply a full level of protection. Maintenance on the failed module can be conducted offline and offsite while the spare module takes over its duties. As the data center grows, operators can simply add more modules to provide the required power backup and thus the Modular UPS provide scalability as well.

The modular UPS streamlines and simplifies installation, maximizing reliability and availability while minimizing total cost of ownership. The latest communication facilities in Riello UPS systems make the UPS system easier to manage and also allows for different monitoring and control requirement of Data Center Infrastructure Management (DCIM).


The Multi Guard modular UPS from UNICORN is a scalable, three/ three phase with double-conversion Uninterruptible Power Supply. MultiGuard racks are supplied with Network management cards and UPS Bypass Switches as standard. Its power capacity ranges from 15kVA to 120kVA, delivering the best combination of reliability, functionality and hot-swap flexibility.

It offers maximum capacity in a 19” rack of 90kVA with a build-in isolation transformer; and maximum capacity in a 19” rack of 120kVA without internal isolation transformer. 15kVA per module with hot-swappable feature and optional PDU (Power Distribution Unit) on the UPS chassis is available up 36 single phase MCB slots with Multi Guard series.

In the conventional or competitive Modular UPS systems, the modules are dependent on 1 or 2 centralized controllers. As critical load operation depends on the reliability of these controllers, this centralized design makes these units less reliable. The Multi Guard 15-120 controller is built into the individual modules, increasing system redundancy. As the LCD module is for communication and display only, it has no effect on the performance of the UPS. In other words each UPS module is a fully functional 15kVA UPS on its own and thus offering true N+X Parallel Redundancy UPS for Data Center applications.


The Riello Multi Power UPS is a modular UPS system based around 42kW power modules. A Power cabinet can house up to 7 power modules providing uninterruptible power from 42-294kW in a single cabinet and providing either parallel N+X resilience or power capacity. A Battery cabinet is used for slide-in battery packs to provide battery runtime. There is also a Combo cabinet providing space for 3 power modules (126kW) and five internal battery shelves.

Multi Power uses advanced technology to provide the highest levels of power availability and resilience and is ideal for Data Centers looking for scalable and easy to service power protection.

Key System Features: The advanced power electronics within each Multi Power MPW series UPS provides full rated power even with Unity power factor loads (kVA=kW) without de-rating up to up to 40°C. High system efficiency whilst operating in on-line double-conversion mode greater than 96.5%. Low input harmonic distortion with a near unity input power factor and an extremely wide input voltage operating range (+20/- 40%), requiring a minimum upstream power source rating.

Advanced Communications with a 7inch front panel LCD touch screen, communication slots and relay cards along with dedicated service ports to interface into any Data Center Infrastructure Management (DCIM) system and communications network.


The Multi Guard Industrial range was specially developed to ensure power continuity in Data Centers deemed critical due to the specific environmental conditions and demand industrial grade power protection. The basic building blocks are 20 kVA UPS. The cabinet is able to house up to four 20 kVA modules and up to two cabinets can be connected in parallel for a total of eight UPS modules and 160 kVA of power.

Multi Guard Industrial is available in modular versions from 20 to 160 kVA. With high level of flexibility Multi Guard Industrial can accept both single-phase and three-phase inputs with no need for special set ups or operator intervention, ensuring full compatibility with any power supply network. Versatile mechanical structure and design gives compatibility with industrial grade environments and power scenario. The module connection clamps are laid out so that the communication signal connections are segregated and separated from the power connections (input, output, by‑pass line, battery), thus ensuring complete immunity from interference generated by the power supply grid, which is typically disturbed in industrial environments. The UPS module has a front to back air flow, allowing the UPS to be installed in any environment and preventing the types of ingress problems associated with top-vented circulations cabinets.

As for now, modularity is rapidly becoming the standard for UPS in Data Centers essentially because of its ability to vividly lower the cost of maintenance and service. Please CONTACT our solutions team for more inputs and support.