SDL Series Single Phase Utility Power UPS

SDL Series Single Phase Utility Power UPS (3kVA~120kVA)

Product Positioning

      Heavy-duty online UPS engineered exclusively for power industry scenarios: thermal power plants, high/low voltage substations, power distribution stations and grid automation control systems.

Full Model Lineup

   ● SDL3-15: 3~15kVA

   ● SDL20-30: 20~30kVA

   ● SDL40-60: 40~60kVA

   ● SDL80-120: 80~120kVA

Core Design Note

      This single phase utility power UPS uses industrial frequency dual conversion architecture, designed to work with substation 110V/220V DC control power supply for seamless grid backup switching.

1. Product Introduction

      Different from commercial rack/tower UPS for office and IT rooms, this single phase utility power UPS targets harsh 24/7 operation environments in power facilities. Built around CPU digital control + high-frequency isolated IGBT inversion, it converts utility AC input into regulated pure sine power for critical control loads.

      When mains AC fails, the unit instantly switches to substation DC backup power for inversion power supply with 0ms transfer time. If DC voltage drops below threshold or inverter faults occur, static switch transfers load to bypass line with audible alarm. Full electrical isolation between input, output and DC bus greatly reduces grid surge interference for power automation equipment.

2. Four Core Strengths for Power Industry Projects

2.1 High Reliability Grid-Adaptive Architecture

      Adopts industrial-frequency dual conversion online mode with 3-port electrical isolation and zero-transfer static switch. Complete overvoltage, undervoltage, overcurrent and short-circuit protection secures substation control devices against frequent grid fluctuation. The single phase utility power UPS can accept flexible DC input (48V/110V/220V) to match existing station battery banks directly.

2.2 Intelligent Digital Monitoring System

      Full CPU digital sampling and logic control; local LCD displays real-time input/output voltage, current and frequency, while indicator lights show inverter, bypass, overload and fault status. Standard RS485 port runs Modbus protocol to connect with centralized substation SCADA system for remote status tracking and fault alert push. Dry contact signals support hardwired interlock with onsite alarm cabinet.

2.3 Flexible & Field-Friendly Operation

      Human-machine interface combines LCD screen and status lamps for easy on-site inspection. Cabinet follows standard power industry enclosure dimensions, with clear digital meter readout for quick parameter check during routine patrol.

2.4 Strict Industrial Environmental Adaptability

      Forced air cooling design supports continuous running at -5℃~40℃ operating temperature; max noise ≤50dB at 1-meter distance, suitable for unattended substation equipment room layout.

3. Primary Application Scenarios for Global Projects

     1.Backup power for control cabinets in thermal power plants, hydropower stations and new energy booster stations

     2.Protection of relay protection & automation devices inside urban and rural high/low voltage substations

     3.Critical load power supply for remote distribution stations and grid monitoring terminals

     4.Industrial control systems for large power transmission & transformation facilities

4. Full Model Parameter Specification Table

4.1 Full Electrical Parameters

Input

   ● AC Voltage: AC220V±25% / AC380V±25%

   ● DC Voltage: DC220V / DC110V / DC48V optional

   ● Frequency: 50Hz±10%

Output

   ● Output Voltage: AC220V±1%

   ● Output Frequency: 50Hz±0.5%

   ● Waveform: 100% pure sine wave, THD＜3% under non-linear load

   ● Overload: two-stage protection logic

   ● Power Factor: 0.8

   ● Crest Factor: 3:1

   ● Efficiency: ≥90%

   ● Transfer Time: 0ms

Protection Logic

   ● Input trip: cut off output + audible & visual alarm

   ● Overload: 1st stage alarm; 2nd stage trips to bypass after 30s auto recovery after load reduction

   ● Short circuit: current-limited continuous output with alarm

   ● Inverter fault: automatic bypass transfer + alarm

   ● Insulation performance meets GB-7260 industrial UPS standard

Display & Alarm

   ● LCD: real-time input/output voltage, current, frequency

   ● LED indicators: inverter status, output active, overload, fault

   ● Alarm triggers for mains anomaly, DC undervoltage, bypass abnormality, overload and system failure with buzzer notification

Communication

   ● RS485: Modbus standard protocol for SCADA integration

   ● Dry contact: inverter/bypass/fault/AC anomaly/DC anomaly/overload signal output

Environment

   ● Operating Temp: -5℃ ~ +40℃

   ● Humidity: 0~95% non-condensing

   ● Dielectric Strength: 1500VAC 1min for input & output terminals

   ● Cooling: forced air cooling

   ● Noise: ≤50dB measured 1m from front panel

5. Optional Supporting Accessories for Overseas Projects

     1.Matched station-grade lead-acid battery bank

     2.Substation centralized UPS monitoring software platform

     3.Isolation transformer for harsh grid areas

     4.Extended dry-contact alarm junction box

6. FAQ for Operators

Q1: Can this UPS work with existing substation 110VDC control power?

A1 Yes, the single phase utility power UPS supports 48V/110V/220V DC input options to match most global substation battery systems.

Q2: Can it connect to substation SCADA monitoring system?

A2: Standard RS485 Modbus RTU interface supports direct integration with mainstream power automation SCADA platforms.

Q3: How does the overload protection operate?

A3: Two-stage protection: warning alarm at light overload, timed bypass switch for heavy overload, automatic recovery after load drops to normal range.

Q4: Is the cabinet design compliant with global power station installation norms?

A4: Standard power industry cabinet layout, easy for on-site wiring, inspection and maintenance for EPC contractors.

Q5: Do you support bulk OEM for regional power project bidders?

A5: We support customized labeling, parameter tuning and bulk shipment for global EPC and system integration partners.

7. Document Download & After-Sales Terms

Downloadable Files

   ● SDL Series 3-120kVA Industrial UPS English Datasheet

   ● Wiring Diagram & Modbus Communication Manual

   ● Full third-party test & certification documents

Warranty

   ● 3-year global warranty for main unit

   ● Remote technical guidance for overseas project commissioning

   ● Customization support for tender project parameter requirements