Legend Star Series Low Frequency Online UPS

.Online double-conversion

.DSP technology guarantees high reliability

.True galvanic isolation transformer design Control designed to withstand all kinds of loads

.Intelligent battery management to prolong battery lifecycle

.Redundant fan design and independent ventilation enhance durable operation under harsh environment

.Adjustable battery numbers

.Accept dual-mains input

.Parallel operation with up to 4 units(option)

.Variety of communication options available

.Optional 7" touch LCD

·Reverse phase frequency operation and supports non-neutral input

The Heavy-Lifter That Doesn't Complain About Your Wiring

Walk into an older factory, a water treatment plant, or a remote pumping station with a UPS designed for a pristine data centre, and you'll likely be fishing error codes out of the log within a week. Unbalanced phases, missing neutrals, reverse-phase feeds, massive inrush currents from motors—your average high-frequency online unit just wasn't built for that kind of abuse. The Legend Star Series is different. It's a low-frequency online double-conversion UPS with a built-in galvanic isolation transformer. That big chunk of iron at its core gives it the electrical muscle to eat all that grid nastiness and keep delivering clean, regulated power. But what really sets it apart is how much you can tailor it to your specific site, instead of forcing your site to conform to it.

Transformer-Backed Double Conversion: It Eats Inrush for Breakfast

Because this is a true online UPS, your critical load never touches raw utility power. Incoming AC is rectified, filtered, and then reconstructed into a perfect sine wave. The transformer sits right in the power path, providing complete galvanic separation between input and output. This isn't just about safety—it radically improves the unit's ability to handle the kind of loads that make typical UPSs choke. Think large electric motors, compressor banks, solenoid valves, or industrial transformers that draw a spike of current at startup. The Legend Star doesn't flinch. It shoves out the required power without the waveform collapsing or the inverter tripping into bypass. If your operation mixes IT racks with heavy machinery, this is the UPS that ties it all together without a separate clean-power setup.

Dial In Exactly the Battery String You Need

One of the quiet frustrations of deploying a UPS is discovering the battery string length is fixed. You're locked into a specific voltage window, so you either over-buy cells to meet the minimum or under-deliver on runtime because the cabinet can't hold enough. The Legend Star throws that rigidity out the window. You can adjust the number of batteries in the series string. Need a little extra runtime? Add a few more cells, adjust the charger parameters accordingly, and you're good. Constrained by an existing battery cabinet size? Tweak the count down to what fits. This adjustability turns battery configuration from a constraint into a design choice. It's especially valuable when you're retrofitting a UPS into an existing site with legacy battery storage that you'd rather reuse than rip out.

Dual Mains Input and the Art of Handling Non-Standard Power

Not every electrical room was wired by a perfectionist. You might have two independent utility feeds for redundancy, or a main grid and a backup generator that need to play nicely together. The Legend Star accepts dual mains input right out of the box—feed it from two sources, and it'll draw from whichever is live without a switching delay.

But it goes further into the weeds of real-world wiring. No neutral line? The unit can be configured to operate without one. Phase rotation backwards because the electrician labelled the cables wrong? It handles reverse-phase operation without throwing a fault. If you're working in older buildings, mobile generator setups, or regions where the electrical code is more of a casual suggestion, this kind of input tolerance isn't a luxury—it's the difference between a UPS that runs for a decade and one that sits dead in the corner.

Built to Keep Breathing in Places That Kill Electronics

Thermal death and dust accumulation are the twin executioners of power electronics in industrial settings. The Legend Star's answer is a redundant fan design with independent ventilation paths. If one fan stops spinning—whether from bearing wear or a blocked grille—the others keep the air moving and the unit doesn't overheat. There's no single-point-of-failure in the cooling system.

Internally, the circuit boards are protected with conformal coating and laid out to resist moisture and dust. The enclosure itself is vented in a way that minimizes debris ingress without choking airflow. This isn't a dainty office UPS that was painted grey and called "rugged." It's a machine designed to live in workshops, warehouses, basements, and outdoor-rated shelters where the air isn't HEPA-filtered and the temperature swings with the seasons.

Intelligent Battery Management That Pays Off in Years

Batteries are the component you'll eventually replace, and how long they last depends heavily on how they're charged and monitored. The Legend Star includes intelligent battery management that actively adjusts charge voltage based on temperature and battery condition. It prevents overcharging, detects weak cells before they degrade the whole string, and generally works to stretch the pack life as far as possible. In a large installation with dozens of cells, that translates into real savings—both in replacement cost and in avoiding unexpected runtime shortfalls.

Scale Up or Add Redundancy Later

Demands grow. Maybe you add a new production line, or a critical system suddenly needs N+X redundancy. The Legend Star allows up to four units to be paralleled for capacity or redundancy. You don't have to rip out the original unit and start over—you simply add more frames to the parallel bus. That scalability protects your initial investment and lets your power infrastructure grow in step with the facility.

Monitoring That Doesn't Force a Menu System on You

On the communication side, the Legend Star offers a wide suite of interfaces—RS232, RS485, dry contacts, and slots for SNMP or MODBUS cards are all standard fare. But the standout optional extra is a 7-inch touch LCD. Instead of navigating a three-line monochrome screen with four arrow buttons, you get a clear, full-colour interface that shows phase voltages, currents, load percentages, battery health, and alarm logs at a glance. It's the sort of screen you'd expect on a premium building management system, and it makes commissioning, troubleshooting, and routine checks significantly less painful.

Where the Legend Star Belongs

This is a UPS for sites where the power is rough, the loads are mixed, and the environment isn't air-conditioned:

`Heavy manufacturing cells with PLCs, servo drives, and motor controls

`Water and wastewater treatment plants with pumps and chemical dosing equipment

`Oil and gas facilities running on generator grids with questionable voltage stability

`Marine and offshore applications where isolation is critical

`Large medical installations with imaging equipment that demands clean, isolated power

`Older commercial buildings with non-standard wiring and no neutral

If your power situation is "textbook"—clean utility, standard single-phase loads, a comfortable equipment room—there are simpler and more compact UPS options. But if your site throws curveballs, the Legend Star Series is the low-frequency workhorse that steps up. It gives you galvanic isolation, adjustable battery configuration, dual inputs, and the ability to swallow non-standard grid conditions without complaint. It's heavy, it's flexible, and it's built for the long, dirty haul.