1. Product Overview

The GTS Rack Series 10–20kVA is a 4U 19-inch rack-mount UPS developed by GOTTOGPOWER (ANHUI) CO., LTD that takes three-phase input and delivers single-phase output — the 3/1 topology designation is the defining characteristic of this product. The practical consequence is significant: a site with three-phase power distribution (the norm in anything above a small office) can feed 10–20kW of single-phase rack loads — servers, storage, network equipment — directly from the three-phase infrastructure without a separate single-phase distribution transformer. The UPS handles the phase conversion internally while simultaneously providing online double-conversion power quality and battery backup.

Three long-run (RL) models cover 10kVA, 15kVA, and 20kVA. All connect to external battery cabinets for configurable runtime. Built on a 3-level conversion topology with high-performance DSP control, the GTS Rack delivers ≤1% linear-load THDu, 0ms inverter-to-bypass transfer, auto fault waveform recording, and a self-aging test function — the same diagnostic and reliability features found in the GTS Tower Series, now in a 4U (174mm) rack chassis that fits directly into the existing equipment cabinet.

2. Key Features

• 3P/1P Input — Single-Phase Output Directly from Three-Phase Infrastructure: The defining capability of the GTS Rack is the ability to accept 190–499VAC (L-L) three-phase input and deliver regulated single-phase output at 220/230/240VAC. This eliminates the need for a separate single-phase isolation transformer between the three-phase distribution board and single-phase rack loads, reducing both the component count and the conversion losses in the power chain.
• 190~499VAC (L-L) Ultra-Wide Input — Multi-Level Derating for Generator Compatibility: The input voltage range spans from 190VAC (L-L) at 50% load to 499VAC, with four discrete derating thresholds (100% @ >305V; 90% @ >266V; 75% @ >228V; 50% @ >190V). This graduated derating means the UPS continues to deliver useful output even as generator voltage sags during startup or heavy loading — a behavior that hard-cutoff designs cannot match.
• 3-Level Topology — Clean Output from Three-Phase Input: Generating single-phase output from a three-phase rectifier input introduces harmonic challenges that 2-level topologies handle less elegantly. The 3-level architecture in the GTS Rack manages this conversion with ≤1% linear-load THDu and ≤3% non-linear THDu — clean enough for audio production, medical imaging, and precision measurement equipment that shares the single-phase output.
• 4U Rack Form Factor — Infrastructure-Integrated 10–20kW Protection: At 174mm tall (4U), the GTS Rack occupies four rack units to deliver 10–20kW of 3/1 online UPS protection. The chassis depth is 580mm standard (700mm maximum), fitting standard 600mm and 800mm deep data center rack configurations without depth modification.
• Auto Fault Waveform Recording — Power Event Evidence in the Rack: The GTS Rack automatically captures and stores electrical waveform data at the moment of any fault event. In a 3/1 topology where input and output waveforms are fundamentally different, having recorded waveforms from both the three-phase input and single-phase output sides simultaneously provides maintenance engineers with the complete picture needed to distinguish a grid fault from an internal UPS event.
• Tighter Overload Management vs Tower Variant — Rack Thermal Awareness: The GTS Rack's overload limits (110%: 10 min; 125%: 1 min; 150%: 30 sec) are more conservative than the GTS Tower (110%: 60 min). This reflects the different thermal environment of a rack — airflow through a 4U chassis in a populated cabinet is more constrained than around a freestanding tower, and the tighter limits protect the UPS from sustained thermal stress that could reduce long-term reliability.
• Self-Aging Test Function — Energy-Saving Commissioning and Maintenance: The built-in self-aging function runs controlled load tests internally without requiring external dummy loads. In a rack environment where connecting and disconnecting external load banks means cable work inside a live cabinet, the self-aging function makes routine UPS testing and commissioning significantly safer and faster.

3. Typical Applications

The GTS Rack Series fills a specific role: 10–20kW of single-phase rack UPS protection in environments where the available power feed is three-phase:

• Three-Phase Site with Single-Phase Server Racks — Eliminating the Transformer: Data halls, server rooms, and equipment rooms fed from three-phase distribution panels can use the GTS Rack to power single-phase server racks directly from the three-phase bus, without installing a dedicated single-phase distribution transformer for each rack row.
• Industrial IT Infrastructure — Generator-Fed 3/1 UPS: Industrial sites where the primary or backup power is a diesel generator benefit from the GTS Rack's graduated voltage derating. The UPS continues to deliver protected single-phase output to PLCs, SCADA terminals, and industrial computers through the generator's voltage excursions rather than dropping to bypass.
• Healthcare Campus Rack Rooms — Quiet, Clean Single-Phase from Building Three-Phase: Hospital IT rooms typically have three-phase building supply but require single-phase power for server racks and medical workstation clusters. The GTS Rack bridges this, with ≤1% THDu output suitable for sensitive clinical electronics and acoustic noise consistent with a continuously occupied equipment room.
• Finance & Trading Racks on Three-Phase PDUs — No Phase Dependency: High-frequency trading infrastructure and financial server racks fed from three-phase PDUs can use the GTS Rack to ensure that single-phase server loads are balanced across the three-phase input while receiving online UPS protection — removing the single-phase load imbalance that direct three-phase PDU connections introduce.
• Broadcast & Production Racks — Isolated Single-Phase from Three-Phase Venue Power: Live event venues and broadcast trucks use three-phase shore power or generator feeds. The GTS Rack's 3/1 topology isolates sensitive broadcast equipment racks from the three-phase distribution, providing a clean, regulated single-phase output that is independent of phase imbalance or voltage variation on the three-phase input.
• Education & Research Server Rooms — Scalable 3/1 UPS with Parallel Expansion: University server rooms and research computing facilities with three-phase building supply can deploy multiple GTS Rack units in parallel (via optional parallel kit) to scale single-phase UPS capacity in line with growing workloads, without adding single-phase infrastructure.

4. Technical Specifications

Models: GTS010RL · GTS015RL · GTS020RL

Note: All models are long-run (RL) with external battery connection (16–24 pcs, settable). Input supports 3P/1P and 1P/1P configurations. All models are 4U (174mm) for standard 19-inch rack mounting.

5. Certifications & Compliance

The GTS Rack Series is tested against IEC 62040-3 for UPS performance classification. THDu values — ≤1% under linear load and ≤3% under non-linear load — are both measured per IEC 62040-3 methodology. The ≤3% non-linear figure is tighter than the ≤5% specified for many rack UPS products at this power class, reflecting the additional output filtering benefit of the 3-level topology.

6. Interfaces & Optional Accessories

Standard Interfaces

RS232 and RS485 are both standard on all three GTS Rack models. In a 3/1 topology deployment, RS485 Modbus integration is particularly relevant: building management and data center DCIM systems often monitor three-phase input parameters (phase voltages, phase currents, power factor per phase) separately from single-phase output parameters. RS485 gives the BMS direct access to both sets of measurements without requiring an additional protocol converter.

Optional Accessories

• SNMP Card — adds IP network UPS monitoring with full 3/1 topology visibility: three-phase input status and single-phase output quality can both be reported to DCIM or NMS platforms via SNMP traps and polling, giving network operations teams a complete view of the 3/1 conversion chain.
• Dry Contact Board — provides isolated relay outputs for generator start/stop, fire suppression interlock, and building alarm integration — useful in industrial and healthcare environments where the GTS Rack's generator-compatible input often means a generator is actually present and needs to be coordinated with the UPS.
• Parallel Kit — links multiple GTS Rack units for N+1 redundancy or aggregate capacity expansion, scaling the total single-phase output power available from the three-phase infrastructure in proportion to the number of parallel units.
• APP / Wi-Fi / Bluetooth — wireless monitoring and alarm access via mobile device, particularly convenient during initial 3/1 commissioning when verifying phase balance on the input and output quality simultaneously from a single handheld device.