Mercury MDC3320S Online UPS, 20KVA/20KW, 3-Phase, 1.0 Power Factor

The Mercury MDC3320S is a high-capacity 20KVA/20KW true online double-conversion UPS, engineered for mission-critical environments requiring uninterrupted, clean, and stable power. With a 1.0 power factor and 3-phase input/output (3/3) configuration, it is ideal for data centers, telecom infrastructure, industrial automation systems, and commercial applications that demand continuous uptime.

Its robust ±120VDC battery system—built from 2 x 20 x 9Ah/12V sealed lead-acid batteries—provides extended runtime and superior power resilience. Featuring a full suite of communication interfaces including USB, RS232, and RS485, and support for integration into building management systems, the MDC3320S is a scalable and intelligent solution for comprehensive power protection and control.

Product Features

True Online Double-Conversion Technology (1.0 PF)
Delivers constant, clean, and isolated AC power through dual AC-DC-AC conversion, ensuring that connected equipment is shielded from all power disturbances. Its unity power factor (1.0) means the entire 20KW rating is usable for active loads, maximizing efficiency and compatibility.

High Power Output – 20KVA / 20KW
Supports high-load environments such as blade server clusters, HVAC systems, manufacturing lines, and communication backbones. With its full 20KW usable output, it handles modern IT loads without derating.

±120VDC Battery Bank – Long Runtime
Configured with 2 sets of 20 batteries (9Ah, 12V), this UPS offers excellent backup duration for critical shutdown processes or sustained operation during grid outages. The advanced charging circuit ensures full recovery within 6–8 hours.

Flexible Terminal-Based Wiring
Input, output, and battery connections are managed via professional-grade terminals, providing secure, high-current transfer paths. This layout supports custom distribution panels and adaptable infrastructure builds.

Advanced Communication – USB, RS232, RS485

• USB: Plug-and-play for local monitoring
• RS232: Serial communication for remote management and automated shutdown
• RS485: Supports long-distance communication and full integration with BMS, SCADA, or automation systems

Intelligent LCD Panel & Alarms
Real-time monitoring of input/output voltages, battery level, load, and system faults through a bright LCD. Audible alarms alert you to events like low battery, overload, or system failure.

Rugged Industrial Design
Built to operate in demanding environments with a 0–40°C operating range and integrated surge protection. Enclosure is compact for a 20KVA UPS and optimized for industrial and commercial installations.

Product Specifications

• Model: Mercury MDC3320S
• UPS Type: True Online Double-Conversion
• Capacity: 20KVA / 20KW
• Phase: 3-Phase Input / 3-Phase Output (3/3)
• Power Factor: 1.0 (Unity)

Input Specifications

• Input Voltage: 400V AC ±10%
• Frequency: 50/60 Hz auto-sensing
• Input Terminal: Terminal block

Output Specifications

• Output Voltage: 400V AC ±1% (3-Phase)
• Waveform: Pure Sine Wave
• Voltage Regulation: ±1%
• Transfer Time: Zero (seamless)

Battery System

• Configuration: ±120VDC (2 x 20 x 9Ah/12V)
• Battery Type: Sealed, maintenance-free lead-acid
• Recharge Time: 6–8 hours to 90%
• Battery Terminal: Terminal block

Communication Ports

• USB: Local monitoring
• RS232: UPS monitoring and auto-shutdown
• RS485: Long-range & BMS/SCADA integration

Indicators & Alarms

• LCD Display: Input/output voltage, load %, battery %, system status
• Alarms:
  • Power failure
  • Low battery
  • Overload
  • Fault condition

Protection Features

• Surge protection
• Overload, short circuit, battery overcharge/discharge

Environmental

• Operating Temp: 0°C to 40°C
• Humidity: 0–90% RH (non-condensing)
• Noise Level: <55 dB at 1 meter

Physical Dimensions

• Height: 250 mm
• Width: 640 mm
• Depth: 900 mm
• Weight: 95 kg

Certifications

• CE, RoHS, ISO9001

Warranty

• 2-Year Limited Warranty (UPS + Battery)