Emerson SP4402

Product Name:​ Emerson (Control Techniques) Unidrive SP Model SP4402, 3-Phase 460V AC Drive / Inverter
Product Introduction:​ The SP4402 is a high-performance universal AC drive from the Unidrive SP series, designed for precise open-loop vector (sensorless), closed-loop vector, and servo motor control. It is suitable for demanding applications requiring high dynamic response, torque control, and multi-axis synchronization.
Category:
Description
Key Technical Specifications:
  • Input Voltage:​ 3 × 380–480 V AC (typical 460 V AC, range 432–528 V)
  • Rated Output Current:​ 83 A continuous (Normal Duty), 74 A (Heavy Duty / Constant Torque)
  • Rated Motor Power:​ 45 kW / 60 HP @ 460 V
  • Output Frequency:​ 0–3000 Hz
  • Overload Capability:​ 150% rated current for 60 s
  • Control Modes:​ V/f, Open-loop vector (sensorless), Closed-loop flux vector, Servo (with encoder option)
  • Communication:​ RS485 as standard (Modbus RTU); optional fieldbus cards (Profibus DP, DeviceNet, EtherNet/IP, CANopen)
  • Built-in Features:​ Dynamic braking control, optional EMC filter, onboard PLC-like functionality via Option Modules
  • Protection:​ Overcurrent, overvoltage, undervoltage, overtemperature, short-circuit
  • Ambient Temp:​ 0 to +50 °C (derated above), storage −40 to +70 °C
  • Enclosure:​ IP20 / UL Type 1 (panel mount version)
  • Certifications:​ CE, UL, cUL, C-Tick
Functional Features:
  • DSP-based high-speed processing for precise torque/speed regulation
  • Regenerative (Active Front End) capable when configured with appropriate option module
  • Modular slot for plug-in I/O, feedback, and communication expansion
  • Auto-tuning for motor parameters, flying start, DC injection braking
Application Scenarios:​ Cranes & hoists, extruders, winders/unwinders, machine tools, pumps/fans with variable torque, conveyor multi-drive systems.
Installation & Notes:
  • Mount vertically in a well-ventilated panel allowing minimum clearances top/bottom for airflow.
  • Use correctly sized input/output cabling; install input isolation contactor and fusing/disconnect.
  • Ensure motor is auto-tuned before first run. Do NOT operate with damaged heat sink or without proper grounding.
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