31S Series High Frequency Online UPS 10K-20KVA

·Double Conversion True Online UPS With Pure Sine-Wave Output.

·Robust Design, Conformal Coating,Strong Anti-Corrosion Capability For Harsh Environment.

·Extra Wide Input Voltage(85V-300Vac), Well Compatible With Gen-Set.

·Input Power Factor Correction,Save Power, Wiring Expense For Use.

·Strong Loading Capability, Work Well With Laser Printer, Ultrasonic Cleaner.

·Compact Size,Win Valuable Space For User.

·Open For Customization, Seamless Integrate With Automatic Control System

Three-Phase Feed, Single-Phase Loads, No Extra Hardware

Walk into plenty of commercial buildings, small factories, medical clinics, or telecom huts, and you'll find the same mismatch: the electrical panel delivers three-phase power, but every piece of gear that actually matters—servers, switches, security DVRs, laser printers, point-of-sale terminals, ultrasonic cleaners—wants plain old single-phase. 230V or 120V. Nothing fancy.

The traditional fix involves a separate transformer, maybe a phase converter, and a fair bit of head-scratching about load balancing. Or you cram in a three-phase UPS and derate it, paying for capacity you can't fully use. The 31S Series sidesteps that whole mess. It takes a three-phase input, anywhere from 10kVA to 20kVA, and delivers clean, regulated pure sine wave single-phase output. True double-conversion online topology. Zero transfer time. No external transformers. No phase-balancing spreadsheets.

Double Conversion That Never Hands Over Raw Grid

This is an online UPS, meaning the inverter runs continuously. The incoming three-phase AC gets rectified to DC, filtered, and then rebuilt into a brand-new single-phase sine wave. Your loads never see the raw utility. When the grid drops, there's no switch to throw—the battery simply takes over the DC bus and the output doesn't twitch. For sensitive single-phase equipment in a three-phase building, that's the only kind of protection that makes sense.

An Input Window That Swallows Almost Anything

The input voltage range on the 31S is 85V to 300V per phase. That's unusually wide, and it matters more than the spec sheet lets on. In an older building where the voltage sags every time the lift motor starts, the UPS stays on utility power instead of burning battery cycles. During a brownout that drops the mains to 90V, it keeps running without a hiccup. And when the backup generator kicks in—maybe a slightly tired unit with sloppy voltage and frequency regulation—the wide window soaks that up too. The UPS accepts the rough generator output and conditions it, so your single-phase loads never see the mess.

Generator Friendly by Design

Because the input frequency range is also broad, the 31S doesn't reject generator power the way some fussy UPS units do. There's no cycling between battery and bypass while the genset stabilises. It syncs, it accepts, it cleans. In a site where the generator is the only thing between you and a prolonged outage, that tolerance keeps the UPS doing its job instead of beeping in the corner with a drained battery.

Active Power Factor Correction on the Input Side

Drawing 10–20kVA from a three-phase panel is a serious load. Without power factor correction, the UPS would pull distorted current, dumping harmonics back onto the building's wiring. That can overheat neutrals, trip breakers, and generally make the facilities electrician unhappy. The 31S includes active input power factor correction, keeping the power factor high and the current draw clean. Less stress on the upstream infrastructure. Lower wiring losses. A happier electrical room.

Handles the Annoying Loads

Some single-phase equipment has a nasty habit of tripping lesser UPS units. Laser printers, for example, pull sharp current spikes when the fuser cycles on. Ultrasonic cleaners draw a weird, high-frequency current that can confuse a basic inverter. The 31S is built for mixed environments where you might have a server, a switch, a printer, and a piece of lab kit all hanging off the same UPS. It doesn't flinch at non-linear loads. The output stays clean and stable even when one device briefly misbehaves.

Compact Enough to Forget About

Floor space in equipment rooms is expensive, both in rent and in opportunity cost—every square foot taken by the UPS is a square foot you can't use for something that generates revenue. The 31S packs its 10–20kVA capability into a compact chassis. It's not the biggest box in the room, and in a crowded utility closet, that relative smallness wins you back valuable real estate.

Built for Harsh Environments

Inside the chassis, the circuit boards get a conformal coating. That's a thin protective layer that shields against moisture, dust, and mild chemical corrosion. In a dusty workshop, a humid coastal telecom shelter, or a utility closet that swings from freezing to baking with the seasons, that coating is the difference between a UPS that runs for a decade and one that corrodes after three years. It's an invisible feature until the day you open up a competitor's unit and find rust on the traces.

Open to Custom Integration

The controller inside the 31S is flexible. If you're a system integrator, an OEM, or a facility manager with a custom supervisory platform, you can usually make this UPS talk. Communication options allow seamless integration with automatic control systems, building management dashboards, and custom monitoring solutions. You're not locked into a closed black box that refuses to share data.

Where the 31S Makes Sense

The 31S Series slots into any site where three-phase service meets single-phase critical loads. Common deployments include:

`Small factories with three-phase mains but single-phase control systems and IT racks

`Medical clinics in older buildings where the diagnostic equipment runs on single-phase

`Telecom huts and base stations with three-phase feed and single-phase networking gear

`Retail headquarters and office buildings where the server room needs clean single-phase power

`Workshops with a mix of computer equipment and single-phase power tools or cleaners

If your single-phase load sits in the 10–20kVA bracket and the wall gives you three phases, the 31S removes the need for external phase conversion. It's online-grade protection, generator-tolerant, and tough enough for the kind of environments that aren't climate-controlled data halls.

A Clean Fix for a Common Problem

The mismatch between three-phase electrical services and single-phase equipment isn't going away. Older buildings aren't getting rewired overnight. The 31S Series bridges that gap without forcing you to bolt on extra transformers, rebalance panels, or overpay for capacity you can't use. It pulls three-phase power, conditions the daylights out of it, and delivers the single-phase sine wave your gear expects. No drama, no downtime, no surprises.