31RS Series High Frequency Online UPS 10KVA-20KVA

●Zero Transfer Time

●Advance DSP base digital control bring high performance of high input Power factor, low distortion , supply the load with perfect sine wave AC power supply

●Three Level Inverter

Low harmony noise, high efficiency , excellent loading capability

●Versatile Input Phase

●Ultra Wide Input Mains Range

Strong compatible with ultra with electric environment, stay well with ultra wide range mains of 90V~300V, 40~70Hz,dramatically reduce battery discharge , prolong battery life

●Best Loading Capability

Up to 0.9 Output Power Factor,50/60 Hz Automatically adapting, selectable voltage , perfectly match all kind of application

●Genset Compatible

●High Input Power Factor

Thanks to digital controlled PFC Technology,>0.99 input power factor

●Reliable Design

Made with strong Glass fiber base (FR4) double side PCB,company with large span component, greatly improve reliability in harsh environment, Well designed ventilation and conformal coating , avoid dust accumulation ,improve resistant to corrosion

●Open To Customization

Based on powerful controller and open architecture, the product is able to be customized to match need of integration of automatic system or intelligent supervisory system

Phase-Agnostic, Site-Ready, and Hard to Kill

You order a three-phase UPS because the spec sheet says that's what the building has. The electrician opens the panel—nope, only single-phase available at that breaker location. Or worse, you've got a project where the UPS might move between sites: one today with three-phase, another next year with single-phase, and you don't want to stock two different machines.

The 31RS ends that debate before it starts. It's a true online double-conversion UPS with a flexible input stage that happily accepts three-phase or single-phase power—whatever shows up at the wall. On the output side, it delivers clean, stable single-phase power. No external phase converters. No last-minute order changes. Just a unit that adapts to the site instead of the other way around.

Double Conversion: The Inverter Never Takes a Break

Inside, the 31RS is a genuine high-frequency online UPS. The inverter is always running, continuously regenerating a pure sine wave from the DC bus. Your servers, network racks, lab instruments, or industrial controls never see the raw grid. When the utility drops, there's no transfer time—the battery seamlessly supplies the DC bus and the output doesn't flinch. For sensitive single-phase loads in a building with uncertain power, that's the protection baseline you want.

A DSP digital controller keeps everything locked. It samples voltage and current thousands of times per second, adjusting the inverter's PWM signals to hold output voltage and frequency dead steady regardless of input conditions. Input power factor sits above 0.99 thanks to active power factor correction, so the UPS draws current cleanly and doesn't inject harmonics back onto your wiring.

Three-Level Inverter That Handles the Weird Stuff

Older two-level inverter designs switch hard between voltage states, generating extra heat and audible noise. The 31RS uses a three-level inverter topology, which smooths out those transitions. The result is lower harmonic noise on the output, better efficiency, and—most importantly—an ability to handle non-linear loads that make simpler inverters distort or fault.

Laser printers with sharp fuser inrush, small motors, ultrasonic cleaners, even mixed racks of legacy and modern IT gear—the 31RS doesn't flinch. It keeps the sine wave clean even when one device is pulling a messy waveform.

Input Window That Covers the Mess

The input voltage range is 90V to 300V per phase, and the frequency tolerance is 40 to 70Hz. That's wide enough that the UPS stays on utility power through deep brownouts and swells, saving the battery for genuine blackouts. In practical terms: if the grid sags to 95V or swells to 280V, the rectifier keeps pulling power and the inverter keeps delivering clean output. No unnecessary battery cycling, no premature wear.

Generator compatibility is baked in. Many backup generators produce sloppy voltage and wandering frequency. The 31RS accepts that rough input, conditions it through the double-conversion stage, and delivers stable single-phase output to the load. The UPS won't keep bouncing between battery and bypass while the genset stabilises. It just syncs and works.

0.9 Output Power Factor: Real Watts for Real Loads

Output power factor is 0.9. A 10kVA unit delivers 9kW; a 20kVA delivers 18kW. That matches modern IT gear with active PFC power supplies far better than legacy 0.7-rated units that waste capacity. Frequency auto-senses 50 or 60Hz, and output voltage is selectable, so the same unit fits different regional grids without manual jumpers.

RS Means Rugged, Not Just a Sticker

The "RS" in the name isn't marketing fluff. Inside, you'll find an FR4 glass fiber double-sided PCB—not the cheap phenolic board that warps and cracks under thermal stress. Components are laid out with large spans to handle vibration and temperature cycling without snapping solder joints. The board gets a conformal coating, sealing out moisture, dust, and mild corrosive agents that build up in unconditioned electrical rooms. Ventilation paths are engineered to push air through efficiently while minimizing dust accumulation.

This is a unit designed to survive in a dusty workshop, a humid coastal shelter, or a utility closet that sees 40°C summers. It's not an office UPS that's been painted gray and called industrial.

Open Architecture for Custom Integration

The controller is powerful and the architecture isn't locked down. If you need the 31RS to integrate with a building management system, an industrial automation controller, or a custom supervisory platform, that's generally achievable. System integrators appreciate not having to fight a sealed black box that speaks only SNMP and refuses to cooperate.

Where You'll Deploy It

The 31RS fills a specific gap: sites that need 10–20kVA of clean single-phase power but have uncertain or variable input phase configurations. Common scenarios:

`Renovation projects where the electrical panel might be three-phase but the branch circuit is single-phase

`Movable equipment racks that travel between sites with different power feeds

`Industrial control panels that might land in either a three-phase or single-phase facility

`Telecom shelters and pumping stations where the available feed isn't guaranteed until installation day

`Server rooms in older commercial buildings with mixed electrical infrastructure

If you're absolutely certain you'll always have three-phase input and three-phase loads, you could go with a dedicated 33-series unit. But if there's any chance the input phase will change—or if you want the freedom to relocate the UPS without rewiring—the 31RS is the pragmatic choice. It's phase-agnostic, rugged, and gives you true online protection without the headache of matching the UPS to the wall.

Summing It Up

The 31RS Series High Frequency Online UPS solves a problem that most spec sheets ignore: the wall doesn't always deliver what the floor plan promised. It takes three-phase or single-phase input, outputs clean single-phase power, and does it inside a chassis that can handle heat, dust, and vibration. DSP control, three-level inverter, wide input tolerance, and active PFC are all standard. If you need flexible input and rugged construction in the 10–20kVA range, this is the unit that stops the electrical surprises before they become downtime.