SKE SR Series 10K–20KVA Rack-Mount Online UPS | 3-Phase Input, 1/3-Phase Output, True Online Double Conversion, High Power Density for Data Centers & Enterprise IT
Product Overview
The SKE SR Series 10K–20KVA is a fully digital, high-frequency rack-mount online UPS designed for enterprise-level critical loads. As a new generation of uninterruptible power supply, it adopts true online double-conversion (AC-DC-AC) technology and 3-phase input design, which can continuously condition incoming power, isolate grid disturbances, and deliver regulated, high-quality power for sensitive equipment. Its compact 4U rack-mount design maximizes rack space utilization, while the flexible input/output configuration (3-phase in / 1-phase or 3-phase out) allows seamless integration into diverse power infrastructure, making it the ideal power protection solution for medium-to-large data centers, enterprise IT rooms, telecom facilities, and industrial control systems.
Key Features & Benefits
True Online Double Conversion: 0ms transfer time between mains and battery, eliminating downtime and data loss for mission-critical systems.
Flexible 3-Phase Input & Output: 3-phase 4-wire input (3×380VAC + N + PE) with optional 1-phase or 3-phase output, adaptable to various enterprise power configurations.
High Power Density & Space-Saving Design: 4U standard 19-inch rack-mount chassis, compact structure to save valuable rack space, suitable for high-density data center deployments.
Ultra-Wide Input Voltage Range: 190–520VAC (3-phase) at 50% load and 305–478VAC (3-phase) at 100% load, adapting to unstable industrial and enterprise power grids.
High Efficiency & Energy Saving: Up to 96% efficiency in online mode; ECO mode boosts efficiency to ~98%, significantly reducing power consumption and operational costs.
Output Power Factor 1.0: Delivers full usable power (10KW–20KW) for modern high-efficiency IT and industrial loads, strong load adaptability for both linear and non-linear loads.
Pure Sine Wave Output: Low waveform distortion (<3% for linear loads, <5% for non-linear loads), compatible with all sensitive electronics and heavy-duty equipment, reducing device losses.
Intelligent Monitoring & Control: Color LCD touch screen for real-time status monitoring (voltage, load, battery level, alarms); supports USB, RS-232, SNMP (optional) for remote management and auto-shutdown.
Smart Battery Management: Three-stage charging design, automatic equalization charging, and deep-discharge protection to extend battery life; adjustable battery quantity and charging current; supports external long-backup battery packs.
Parallel Capability: Supports up to 4 units in parallel, enabling scalable power redundancy and meeting growing load demands (up to 80KVA).
Comprehensive Protections: Overload, short-circuit, over/under-voltage, over-temperature, surge/lightning, and battery overcharge protection; EPO (Emergency Power Off) function for safe operation.
Generator Compatible: Wide input frequency range (46–64Hz), works seamlessly with backup generators for off-grid or remote enterprise environments.
Technical Specifications
| Parameter | Specification |
| Model | SR31-10KS, SR31-15KS, SR31-20KS |
| Rated Power | 10KVA/10KW, 15KVA/15KW, 20KVA/20KW (PF=1.0) |
| Topology | True Online Double Conversion (High Frequency) |
| Input | 3-phase 4-wire (3×380VAC + N + PE); Voltage Range: 190–520VAC (50% load), 305–478VAC (100% load); Frequency: 46–64Hz; PF ≥0.99 |
| Output | Optional 1-phase (208/220/230/240VAC) or 3-phase (3×380/400/415VAC); Pure Sine Wave; Voltage Regulation: ±1% |
| Output Frequency | 50Hz ±0.1Hz or 60Hz ±0.1Hz (battery mode) |
| Transfer Time | 0ms (AC↔Battery) |
| Efficiency | Up to 96% (online mode); ~98% (ECO mode) |
| Waveform Distortion | <3% (linear load); <5% (non-linear load) |
| Form Factor | 4U 19-inch Rack-Mount |
| Battery | Maintenance-free VRLA; Internal (standard) / External (long-run); Adjustable battery quantity |
| Recharge Time | ~5 hours to 90% capacity |
| Communication | USB, RS-232, SNMP (optional), Dry Contact, EPO |
| Display | Color LCD Touch Screen + LED Indicators |
| Operating Environment | 0–40°C, 20–90% RH (non-condensing) |
| Protection Class | IP20 |
| Certifications | CE, ISO9001, IEC62040, RoHS |
Ideal Applications
Medium-to-Large Data Centers & IDC Rooms
Enterprise IT Infrastructure (servers, storage, switches, routers)
Telecom & Broadcasting Systems
Financial Institutions (bank data centers, securities trading systems)
Industrial Control & Automation Cabinets
Medical Facilities (diagnostic equipment, life-support systems)
Transportation & Traffic Control Centers
Oil & Gas, Petrochemical Industrial Equipment
Large Retail & Commercial Critical Systems
Why Choose SKE SR Series 10K–20KVA Rack-Mount UPS?
Enterprise-Grade Reliability: True online double-conversion and 3-phase design ensure stable power supply for 24/7 mission-critical operations, with zero downtime risk.
Flexible & Scalable: 3-phase input/1-3 phase output, parallel capability up to 4 units, and adjustable battery configurations adapt to growing enterprise needs.
Space-Saving & Efficient: 4U compact rack-mount design maximizes rack density; high efficiency reduces power and cooling costs.
Strong Load Adaptability: Output PF=1.0 delivers full power for modern IT and industrial loads, compatible with linear and non-linear equipment.
Intelligent & Easy to Manage: Color LCD touch screen and multiple communication ports enable convenient local and remote monitoring, reducing maintenance costs.
Grid & Generator Friendly: Ultra-wide input range and frequency adaptability perform flawlessly on unstable grids and with backup generators.
Trusted Quality: Industrial-grade components, global certifications, and mature design ensure long-term reliable operation in demanding enterprise environments.
