★：Equipped with both input and output isolation transformers and a dedicated voltage-stabilized bypass cabinet, it isolates grid disturbances at the source, delivering clean, stable power to critical loads.
★：Directly compatible with 220V DC panel battery banks, it eliminates the need for separate batteries, significantly reducing capital and maintenance costs for seamless integration into industrial power systems.
Contact: home@dn-ups.com
Tel: 021 34553681
Phone: 18964032600, 18049827051
Add: No. 52 Xinjian East Road, Greenland S&T Island Plaza, Minhang District, Shanghai, China
Equipped with dual input & output isolation transformers and isolated voltage-regulated bypass cabinet. 220VDC standard, directly compatible with existing DC screen battery banks in substations and power plants — significantly reducing initial investment while providing the highest level of electrical isolation and impact resistance.
Automotive production lines, metallurgical control systems, mining heavy equipment, precision machining PLC control, robotic welding lines. Withstands large motor start-up shocks and adapts to mixed inductive/capacitive loads.
Power plant DCS systems, nuclear power instrumentation, offshore oil & gas platforms, PV inverter stations, substation integrated automation. Directly utilizes 220V DC screen batteries for long backup time.
High-speed rail traction substations, metro signaling systems, airport navigation/radar, port shore power systems. Adapts to voltage fluctuations and high-frequency harmonic interference for uninterrupted critical signals.
Supercomputing centers, 5G core rooms, semiconductor fabs, hospital imaging equipment, water treatment plants. Provides zero-interruption pure sine wave output to prevent data loss.
220VDC version directly matches power plant/substation DC operating power, eliminating extra batteries and reducing footprint & maintenance costs. 1.5x oversized rectifier design delivers up to 80A fast charging. Optional battery temperature compensation extends battery life by over 30% in harsh environments.
Full electrical isolation suppresses grid spikes (6kV/10kA), surges and common-mode interference. Optional output neutral directly grounded system delivers clean power for precision loads. Supports 100% unbalanced loads and large motor starting.
Built-in isolated, voltage-regulated bypass ensures stable output during UPS maintenance or overload transfer, protecting loads from voltage fluctuations. Full galvanic isolation, zero neutral-ground voltage. External maintenance bypass optional. Dual independent mains input supported.
| Power Rating | Dimensions(D×W×H mm) | Net Weight(kg) | IP Rating | Operating Temp |
|---|---|---|---|---|
| 10kVA~40kVA | 800×800×1800 | 354~480 | IP31(Standard) / IP42 Optional |
0~40℃ Storage -25~55℃ |
| 60kVA~80kVA | 800×1200×1800 | 680~910 | ||
| 100kVA~120kVA | 800×1600×1800 | 1010~1620 |
Standard RS232/RS485, 5DO/4DI dry contacts, supports ModBus RTU/SNMP protocols. Directly integrates with DCS or IIoT platforms for remote monitoring, battery management and alarm notifications. 7-inch touch screen with real-time power flow, fan/battery life alerts to reduce unplanned downtime.
LF31-220 Series Industrial UPS — Protecting critical power from generation to smart manufacturing with isolation, DC sharing and redundant architecture.
Power Range: 10kVA ~ 120kVA | 220VDC Standard | Dual Isolation + Regulated Bypass | Custom Higher Protection Available
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