Front view of INVT GD350A 250 kW 3-phase 400V inverter
Front view of INVT GD350A 250 kW 3-phase 400V inverter
Right side view of INVT 250 kW VFD – GD350A 3-phase inverter
Left side view of INVT GD350A 250kW 3-phase 400V inverter
Top view of 250 kW INVT VFD – GD350A 3-phase 400V inverter
Bottom view of INVT GD350A 250 kW VFD – 400V industrial inverter

INVT GD350A 250 kW VFD | 400 V 3-Phase Inverter (Dual-Rating)

CHF 7,495.00 excl. VAT, free Shipping

  • Power Rating: 250 kW (Normal Duty) / 220 kW (Heavy Duty)

  • Voltage: Three-phase 400V AC

  • Control Modes: Vector Control (VC), Sensorless Vector Control (SVC), Advanced I/F, Constant Current

  • High Starting Torque: 0.25 Hz / 150% (Asynchronous)

  • Speed Accuracy: ±0.2% (SVC), ±0.02% (VC)

  • Auto Motor Tuning for both asynchronous and synchronous motors

  • Built-In Protection: Overvoltage, overcurrent, phase loss, overheating, etc.

  • Safe Torque Off (STO) for certified machinery safety

  • Overload Capacity: 150% for 60s, 180% for 10s, 200% for 1s

  • Braking Modes: DC, dynamic, magnetic, and short-circuit braking

  • Networking: Built-in Modbus RTU, optional CANopen, Profibus DP, Profinet

  • Wireless Ready: Optional Bluetooth/WiFi for INVT-Workshop app (30m range)

  • Flexible I/Os: Digital and analog inputs/outputs, pulse outputs

  • Integrated PLC: 128kB memory for automation logic

  • USB Port: For quick data backup, analysis, and firmware updates

  • Applications: Pumps, HVAC, conveyors, crushers, machine tools, energy systems

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SKU: GD350A-220G/250P-4 Category: Tag:

Description

The INVT GD350A 250 kW is a high-performance 400 V 3-phase frequency inverter built for precise motor control in demanding industrial environments. With dual power ratings—250 kW (Normal Duty) and 220 kW (Heavy Duty)—the GD350A 250 kW ensures reliable operation under variable loads.

Ideal for large HVAC systems, industrial pumps, conveyors, and automation machinery, this model combines advanced vector control, flexible dual-rating capability, and robust safety features for dependable integration into both new installations and system upgrades.

Key Specifications

  • Power Rating: 250 kW (Normal Duty) / 220 kW (Heavy Duty)

  • Voltage: 3-Phase 400V AC

  • Control Modes: Vector Control (VC), Sensorless Vector Control (SVC), Advanced I/F Control, Constant Current Control

  • Supported Motors: Asynchronous & Synchronous

Precision Torque & Motor Control

The INVT GD350A 250 kW provides highly accurate motor and torque control, ideal for industrial applications requiring precision under variable loads.

  • High Starting Torque:

    • Asynchronous motors: 0.25 Hz / 150 %

    • Synchronous PM motors: 0 Hz / 200 %

  • Speed Accuracy: ±0.2 % (SVC), ±0.02 % (VC)

  • Torque Accuracy: ±10 % (SVC), ±5 % (VC)

  • Auto Motor Tuning: Optimizes efficiency, performance, and stability across diverse motor types.

Advanced Safety & Stability

The GD350A 250 kW is engineered for robust operation in demanding industrial environments, with extensive safety and protection features:

  • 30+ Fault Protection Functions: Overvoltage, overcurrent, overheating, phase loss, undervoltage, and more.

  • Overload Capacity: 150 % for 60 s, 180 % for 10 s, 200 % for 1 s.

  • Safe Torque Off (STO): Hardware-integrated safety for compliance with machine safety standards.

  • Uninterrupted Operation: Maintains motor function during brief power disturbances using stored energy.

Smart Braking & Deceleration Control

The GD350A 250 kW offers flexible and intelligent braking for smooth operation and reduced downtime:

  • Braking Options: DC braking, dynamic braking, magnetic braking, short-circuit braking.

  • Smooth Ramp-Up/Ramp-Down: Intelligent frequency and voltage control prevents mechanical stress and system shocks.

Flexible Connectivity & Industrial Integration

The GD350A 250 kW integrates seamlessly into modern automation systems, supporting both wired and wireless communication:

  • Built-In Communication: Modbus RTU

  • Optional Interfaces: CANopen, Profibus DP, Profinet

  • Wireless Configuration: Add-on Bluetooth/WiFi modules enable remote access via the INVT Workshop app (up to 30 m)

I/O Interfaces:

  • 4 digital inputs

  • 2 high-speed pulse inputs

  • 2 analog inputs

  • Relay, analog, and pulse outputs

  • USB port for parameter backup, data transfer, and maintenance

User-Centric Design & Expandability

  • Multilingual LCD Display: Simplifies setup and real-time monitoring.

  • Built-In PLC: 128kB programmable logic memory for on-site automation.

  • Three Expansion Slots: For communication, feedback, and I/O modules.

  • PC Interfaces: USB-RS485, Ethernet, and cloud-ready protocols (UDP, MQTT).

Typical Applications

  • Water & wastewater pumping stations

  • HVAC systems and air handling units

  • Crushers, mixers, and conveyors

  • Textile and plastic processing lines

  • Packaging, food production, and automation cells

  • Renewable energy systems and energy-saving retrofits

Why Choose the INVT GD350A 250 kW?

The INVT GD350A 250 kW (400 V 3-phase, dual-rating) is designed for demanding industrial applications requiring high precision, reliability, and scalability.

  • High Starting Torque at Low Speeds: Optimized for both asynchronous and synchronous PM motors.

  • Advanced Fault Protection & Stability: Over 30 protection functions and overload handling for continuous operation.

  • Seamless Industrial Integration: Supports Modbus, CANopen, Profibus DP, Profinet, and optional wireless modules for remote access.

  • Expandable Architecture: Add optional I/O, PLC functions, or communication modules for future-proof installations.

  • User-Friendly Setup: Quick parameter configuration via LED panel or INVT Workshop software.

See our full range of 400 V variable frequency drives, covering all power ratings from 0.75 to 500 kW.

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Additional information

Brake Chopper

Communication Protocols

Ethernet/IP, Profinet, CAN Master/Slave, etc. (extension card is needed), Modbus RTU & ASCII
Control Methods

SVPWM, SVC (Sensorless Vector Control), VC (Vector Control with Encoder)
Dual Rating Capability

Dual Rating
EMC Filter

Input Voltage

Motor Compatibility

Asynchronous Motors, Synchronous motors
Mounting Type

Wall and Flange Mounting
Safety Features

User Interface

Multi-function LCD keypad

Specification

P (Normal Duty) Motor Rated Power 250
Rated Current 480
G (Heavy Duty) Motor Rated Power 220
Rated Current 425
Line Voltage, Frequency AC 3-ph. 380 V … 440 V (-15% … +10%), 50 Hz/60 Hz (± 5%)
Output Voltage 3-ph. 0 V … 480 V (max. input voltage)
Overload Capacity 150% for 60s in G setting (Heavy Duty), 120% for 60s in P setting (Normal Duty)
Output Frequency 0 … 590 Hz
Control Inputs  Analog: 2 inputs (AI1: 0 … 10 V / 0(4) … 20 mA; AI2: -10 … 10 V), optionally expandable
Digital: 6 programmable inputs, including 2 high-speed inputs (50 kHz) for speed setpoint or actual value via incremental or pulse encoders, optionally expandable
Control Outputs  Analog: 1 programmable output 0 … 10 V / 0(4) … 20 mA, optionally expandable
Digital: 2 programmable outputs, one of them high-speed (50 kHz), potential-free, optionally expandable
Relays: 2 programmable changeover contacts (NO/NC), optionally expandable
Interfaces RS485 (terminals) as standard, up to 3 freely configurable option interfaces for communication modules, terminal expansions, feedbacks, and PLC cards
Brake Chopper optional
EMC Filter Integrated IEC61800-3 C3; IEC61800-3 C1 & C2 optional
DC Reactor optional
Safety Functions Two-channel STO (Safe Torque Off) (IEC61800-5-2, SIL2, PL “d”)
Protection Rating IP20, optional IP55
Ambient Temperature -10°C … +50°C; power reduction required if ambient temperature exceeds +40°C, air cooling
Certification CE, TÜV
Dimensions / Weight 680 mm x 960 mm x 380 mm / 165kg

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FAQ

1. What is the difference between Normal Duty (ND) and Heavy Duty (HD) for the GD350A 250 kW?
The INVT GD350A 250 kW has two power ratings for different applications:

  • Normal Duty (ND): 250 kW – suitable for fans, centrifugal pumps, and other applications with moderate starting torque.

  • Heavy Duty (HD): 220 kW – ideal for conveyors, crushers, mixers, or loads requiring higher starting torque and extended overload capacity.
    This dual-rating ensures optimal sizing, efficiency, and reliability for diverse industrial scenarios.

2. Which motor types can the GD350A 250 kW drive?
The GD350A 250 kW is compatible with asynchronous (induction) and synchronous motors. Auto motor tuning optimizes parameters for both types, delivering stable, efficient, and precise motor control.

3. What starting torque does the GD350A 250 kW deliver?

  • Asynchronous motors: up to 150 % torque at 0.25 Hz

  • Synchronous motors: up to 200 % torque at 0 Hz
    These high torque values ensure reliable startup even under heavy load conditions.

4. Can the GD350A 250 kW operate safely in unstable or harsh power environments?
Yes. It includes over 30 protection functions, such as overvoltage, undervoltage, overcurrent, phase loss, overheating, and motor surge protection. The VFD also supports ride-through functionality to maintain output during brief power interruptions.

5. Does the GD350A 250 kW include Safe Torque Off (STO)?
Yes. The integrated STO function meets IEC 61800-5-2 standards, allowing secure motor shutdown during emergencies or maintenance without external contactors.

6. Which industrial networks are supported?
The VFD comes with built-in Modbus RTU and optional modules for:

  • CANopen

  • Profibus DP

  • Profinet
    These options allow seamless integration with PLC and SCADA systems.

7. Is wireless monitoring available?
Yes. Optional Bluetooth and Wi-Fi modules allow wireless setup, monitoring, and control via the INVT-Workshop app, with a range up to 30 meters.

8. How is the GD350A 250 kW configured and monitored?
It features a multi-language LCD panel for parameter setting and live status display, and supports:

  • USB-RS485

  • Ethernet connectivity

  • Cloud protocols such as UDP and MQTT for remote access

9. Can the GD350A 250 kW be customized for specific automation needs?
Yes. It includes an integrated PLC (128 kB memory) and three expansion slots for communication, I/O, or feedback modules. Flexible I/O allows complex automation logic, PID control, and multi-speed operation.

10. What applications are suitable for the GD350A 250 kW?
The INVT GD350A 250 kW is ideal for:

  • Large HVAC systems (AHUs, chillers, exhaust fans)

  • Water and wastewater pumps

  • Crushers, mixers, conveyors

  • Textile and plastic machinery

  • Food and packaging lines

  • Renewable energy systems

  • General industrial automation requiring precise speed and torque control

Related Documents

Documentation for INVT GD350A 3-Phase 400V 250kW VFDs:

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