Queen Star Series High Frequency Online 6K-10KVA

· Latest Three Level Inverter tech

· True online double conversion technology, Pure Sine Wave Output

· 0.9 Output Power Factor

· Digital LCD Screen, Zero transfer time

· DSP Technology, compact design

· Active input power factor correction (PFC)

· Protection against all types of power problems

· Wide range of input voltage and frequency

· Active Load Management, cold start function

· Sufficiency Expansion Slots for USB,AS400,CMC monitoring, SNMP,RS485 and EMD environment monitoring

· Equipped with maintenance bypass switch

· Generator Supportable

· Sealed lead acid, maintenance free battery

Rack-Ready Protection That Runs Cool and Quiet

Moving up to 6 or 10kVA changes the conversation. You're no longer talking about backing up a couple of workstations. At this size, you're keeping a whole server rack alive, a small data closet humming, or a piece of lab equipment that costs more than the building's wiring. The Queen Star Series in this power band holds onto the same online double-conversion architecture that defines the smaller units—zero transfer time, continuous pure sine wave output, complete isolation from whatever the grid is doing—and then it layers on a few upgrades that make sense when the loads get serious.

The biggest technical bump is the move to three-level inverter technology. Most high frequency UPS units use two-level inverters. They work, but they switch hard, which generates extra heat and acoustic noise. A three-level inverter switches more softly, producing a smoother waveform with less stress on the components. In practice, that means the UPS runs cooler, wastes less energy, and doesn't fill the room with fan noise. It's the kind of refinement you notice when a unit is installed in an office-adjacent closet rather than a dedicated, soundproofed electrical room.

Online Double Conversion: Still the Non-Negotiable

Just like its smaller sibling, the Queen Star 6–10kVA never feeds raw utility power to your equipment. The incoming AC gets converted to DC, filtered, and then rebuilt into a pristine sine wave by the inverter. There's no transfer switch delay because there's no transfer. When the grid fails, the battery seamlessly takes over the DC bus and the inverter keeps spinning. Your servers, switches, and storage arrays don't register a thing—not a single missed cycle, not a log entry about a power event.

For applications where uptime is measured in dollars per second, that's the only acceptable answer.

0.9 Output Power Factor: Real Watts for Modern Loads

Old UPS designs often quote a big VA number that doesn't translate into usable watts. A 10kVA unit with a 0.7 power factor only gives you 7kW. Most of today's IT equipment—servers with active PFC power supplies, switches, storage shelves—pulls current with a power factor close to 1.0. The Queen Star Series puts out a 0.9 power factor, so a 10kVA unit delivers a full 9kW. You're not paying for phantom capacity. You're getting what you paid for, and it actually matches the gear you're plugging in.

Active Input Power Factor Correction: Playing Nice with the Building

On the input side, active power factor correction keeps the incoming power factor above 0.99. That's not just a bragging right. It means the UPS draws current cleanly, in phase with the voltage. There's less reactive power sloshing around, less heat buildup in the wiring, and far fewer harmonic currents being pumped back into the building's electrical system.

If you've ever had to deal with nuisance breaker trips or overheated neutrals in a facility with lots of electronic loads, you'll appreciate why this matters. The Queen Star Series doesn't pollute the very grid it's supposed to protect against.

Maintenance Bypass: Swap the UPS Without Dropping the Load

At the 6–10kVA level, the equipment attached to the UPS is usually too important to shut down just because the UPS needs a service check. The built-in maintenance bypass switch is the solution. When you need to work on the unit—whether it's a battery replacement, a firmware update, or a full swap—you can manually route utility power (or generator power) around the UPS directly to the load.

No rewiring. No live cable juggling while your servers are beeping. Just a controlled transfer that keeps everything running while the UPS is safely off. For a small IT team or a managed service provider who can't schedule downtime, that feature alone justifies the choice.

Generator Support: Clean Output from Dirty Input

Backup generators, especially smaller or older units, don't produce the textbook sine wave you get from the utility. Their output can be ragged, with voltage and frequency swings that cause lesser UPS units to reject the source and stay on battery until they drain. The Queen Star Series is built with a deliberately wide input voltage and frequency window. It accepts the messy generator power, runs it through the double-conversion process, and delivers clean, stable output to the load.

Your equipment never sees the generator's rough edges. It just sees perfect AC, regardless of what's happening upstream.

Cold Start Capability: Fire It Up When There's Nothing

The cold start function lets you turn on the UPS from battery power alone, even if the grid is completely dead and no generator is running. This can be a lifesaver in remote installations, disaster recovery drills, or any situation where you need to bring systems online temporarily before the mains are restored.

Adaptive Load Management: Smart Shedding When Capacity Is Tight

Running close to the unit's limits? The Queen Star Series includes active load management that monitors total output and can intelligently shed non-critical outlet groups if the load approaches an unsafe level. When capacity frees up, it reconnects them. This is especially useful when you're on generator power and need to prevent an overload that could bring down everything.

A Display That Doesn't Require a Manual

The digital LCD screen gives you the key numbers at a glance: input voltage, output voltage, load percentage, battery level, frequency. It's not buried in submenus. There's no cryptic code to decipher. If something's wrong, you'll know what and you'll know it quickly.

Communication Options for Every Environment

No matter what monitoring system you're already running, there's likely a slot for it. The Queen Star 6–10kVA includes expansion capacity for USB, AS400 (for legacy IBM systems), RS485, SNMP for network management, and even an EMD environment monitoring card that tracks temperature and humidity inside the rack. If your NOC or building management system needs to see the UPS, it can.

Sealed Lead-Acid Batteries: No Watering, No Vents

The unit uses maintenance-free sealed lead-acid batteries. You don't need to top them up, you don't need special ventilation, and they're readily available when replacements are due years down the line. At this power range, that's the pragmatic choice—proven, predictable, and easy to service.

Compact Rack Design: Fits Where It Should

Despite the jump in power, the Queen Star Series keeps its footprint tight. It's designed for standard 19-inch rack mounting and takes up only a few U of vertical space. You're not sacrificing half a rack to house the UPS. That leaves more room for the equipment that actually generates revenue.

Where It Belongs

The 6–10kVA Queen Star is aimed squarely at small to medium server rooms, branch office data closets, medical labs, and light industrial settings where power quality has to be flawless but the UPS can't be a loud, hot, hulking machine that demands its own room. It's a step up from the 1–3kVA units not just in wattage, but in the features that make a difference when uptime is non-negotiable and service windows are rare.

If you're looking for online double-conversion protection that runs efficiently, integrates cleanly, and includes the kind of service-friendly design (like that maintenance bypass) that actually saves you during a midnight call, the Queen Star Series at 6–10kVA is built for the job.