Delta VFD3550C43A-00 C2000 Plus Series 355kW VFD

The Delta VFD3550C43A is a 355 kW (475 HP) drive from the C2000 series of high-performance vector-control AC drives. On a 3-phase 460V supply it provides a Normal-Duty rated output current of 683 A and combines precise speed, torque and position control with built-in PLC and networking. The C2000 is a dual-mode platform that drives both induction and permanent-magnet motors, making the VFD3550C43A suitable for the most demanding crane, winding and process applications.

Key Features

• High-performance field-oriented control (FOC) delivering 150% torque at 0 Hz with PG feedback
• Speed, torque and position control for both induction and permanent-magnet (PM) motors
• Dual-rating design — switch between Normal Duty and Heavy Duty to match the load
• Built-in 10K-step PLC and CANopen master for distributed control and fast data exchange
• Built-in DC reactor (Frame D & above) and brake chopper (Frame A–C) reduce harmonics and panel parts
• Built-in safe-stop (STO) function and conformal-coated boards (IEC 60721-3-3 Class 3C3)
• Hot-pluggable KPC-CC01 LCD keypad with copy, real-time clock and multi-language display

Performance & Control

The VFD3550C43A supports nine control modes — V/F, SVC, VF+PG, FOC+PG, TQC+PG, PM+PG and the three sensorless variants — so a single drive covers everything from simple fan control to closed-loop servo-grade positioning. In FOC+PG mode it delivers 150% torque at 0 Hz for precise, stable low-speed control, and its dual-rating design lets you select Normal Duty (120%/1 min) or Heavy Duty (150%/1 min) to match the machine. Output frequency reaches 599 Hz, with fast impact-load response and auto energy-saving operation under steady load.

Reliability & Environment

The VFD3550C43A is built for harsh plants: conformal-coated circuit boards (Class 3C3), a 50 °C operating rating, isolated cooling path and removable fans extend service life. A built-in brake chopper (Frame A–C) or optional brake unit handles regenerative energy, while the built-in DC reactor (Frame D and above) suppresses harmonics and improves power factor (>0.98). Built-in safe-stop (STO) and full electronic motor protection meet CE, UL and cUL standards.

Typical Applications

• Cranes, hoists and elevators needing 4-quadrant torque control
• Printing, winding and converting machinery requiring precise tension and position control
• High-inertia loads such as centrifuges, dewatering and roving machines
• Pumps, fans and compressors with auto energy-saving operation
• Machine tools, extruders and process lines demanding fast impact-load response

Ideal For

Engineers specifying a 355 kW drive for 4-quadrant, high-torque or position-critical machinery where PM-motor capability, networking and energy saving matter. The VFD3550C43A ships with a GST invoice, pan-India delivery and full technical and commissioning support.