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MVF20 Series – Variable-Frequency Drive

Delta MVF20 Series: Efficient variable-frequency drive for general-purpose motor control, suitable for fans, pumps, and compressors. Compact design with a voltage range of 3.3–11 kV and power capacity from 250 to 10,900 kW. Features over 98.5% efficiency, multi-level output voltage, and a user-friendly 7-inch touch screen. Supports various control methods and motor types, ensuring optimal performance in diverse applications.

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Description

Product Headline: Delta’s MVF20 Series is a highly integrated and efficient variable-frequency drive designed for general-purpose motor control, ideal for fans, pumps, and compressors.

Product Introduction: The MVF20 Series features a compact, in-parallel cabinet design that maximizes power density and space utilization. This device operates within a system voltage range of 3.3–11 kV ±10%, catering to a motor shaft power range from 250 to 10,900 kW. Its innovative design allows for easy maintenance without the need for rear or side access, making it suitable for wall-mounted installations. Motor cable entry is flexible, allowing connections from the top or bottom.

Features & Benefits:

  • Control Power: Single-phase 220 VAC; 5 kVA
  • System Efficiency: >98.5% (at rated; excluding transformer losses)
  • Power Factor: >0.96 (at rated)
  • Harmonics: Input current/output voltage harmonics <5% (at rated), compliant with IEEE 519-1992 and GB/T 14549-93 standards
  • Technology: IGBT-based cascaded connection for various working voltages, generating a multi-level output voltage that approximates a sine wave
  • Overload Capacity: 110% for 1 minute / 10 minutes
  • IP Rating: IP31
  • Cooling Method: Forced air cooling
  • Control Methods: V/F control, vector control with speed sensor (SVC), and sensorless vector control (SLVC)
  • Control Functions: Includes acceleration/deceleration speed selection, frequency skipping, automatic voltage regulation (AVR), flying start, field weakening, adaptive deceleration, input undervoltage derating, low-voltage ride-through, automatic restart, and multi-motor parameter storage
  • Human-Machine Interface: 7-inch multi-language touch screen
  • Communication Method: Modbus RTU
  • Fitted Motor Types:
    • Induction Motors: Squirrel cage and wound motors
    • Synchronous Motors: Brushed excited motors

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