460V AS3 Drive | Toshiba VFAS3-4150PC 20/25 HP

The Toshiba VFAS3-4150PC is a flexible and powerful high-performance AC drive from the AS3 series, offering dual horsepower ratings to match application demands. This 20 HP/25 HP, 460V drive combines advanced control modes with integrated safety and connectivity in a robust A3 frame, ideal for a wide range of industrial applications.

Core Technical Specifications

• Brand & Model: Toshiba VFAS3-4150PC
• Series: AS3 Series High-Performance Drive
• Dual HP Rating: 20 HP (150% OL) / 25 HP (120% OL)
• Supply Voltage: 3-Phase, 460 VAC Input & Output
• Current Rating: 31.7 A (150% OL) / 39.2 A (120% OL)
• Frame Size: A3
• Enclosure: UL Type 1 / IP20 rated enclosure.

Advanced Control & Performance

• Control Modes: V/Hz, Sensorless Flux Vector Control (FOC), Encoderless/Encoder Torque Control.
• Dual Overload Capacity: Configurable for 150% (Heavy Duty) or 120% (Normal Duty) overload for 60 seconds.
• Frequency Range: 0.1 Hz to 590 Hz for precise speed control.
• Carrier Frequency: Adjustable from 1 to 16 kHz for optimized motor performance and noise control.
• Dynamic Braking: Integrated braking circuit (external resistor required).
• Safe Torque Off (STO): Integrated safety function compliant with safety standards.

Communication & Connectivity

• Network Ports: Dual 10/100 Mbps Ethernet (RJ45) and one RS-485 (RJ45).
• Supported Protocols: EtherNet/IP, Modbus TCP, Modbus RTU, built-in web server (HTTP).
• Expansion Slots: Optional cards for EtherCAT, encoder feedback, and additional I/O.
• Integrated Features: Built-in DC reactor and EMC filter.

I/O & Physical Data

• Analog Inputs: 3 channels (0-20 mA / 4-20 mA, ±10 VDC).
• Analog Outputs: 2 channels (0-20 mA, 0-10 VDC).
• Digital Inputs: 8 programmable inputs, 24 VDC sinking/sourcing.
• Digital Outputs: 3 relay outputs (1 Form C, 2 Form A).
• Dimensions (HxWxD): 21.80" x 8.30" x 9.20".

Environmental & Compliance

• Operating Temperature: -15°C to +50°C (5°F to 122°F).
• Mounting: Panel or wall mount.
• Motor Compatibility: 3-phase induction and permanent magnet AC motors.
• Certifications: UL Listed, CSA, CE, RoHS compliant.

Frequently Asked Questions (FAQ)

What does the dual horsepower rating mean for my application?

You can configure the drive for either a 20 HP heavy-duty application (with higher 150% overload capacity) or a 25 HP normal-duty application. This gives you flexibility to match the drive's capability to your specific motor and load requirements.

What applications benefit most from this drive?

It is ideal for applications like conveyors, mixers, pumps, fans, and machine tools that require robust performance, precise control, and the option for higher overload capacity during startup or process variations.

How does the integrated dynamic braking work?

The drive has a built-in braking chopper. To use it, you must connect an external braking resistor that is properly sized to dissipate the regenerative energy produced during motor deceleration or from overhauling loads.

What is the benefit of the 1-16 kHz carrier frequency range?

This allows fine-tuning: higher frequencies reduce audible motor noise, while lower frequencies minimize drive switching losses and are better for long motor cable runs.

Is the STO (Safe Torque Off) feature pre-wired?

The STO safety terminals are provided on the drive. However, you must connect them to a safety-rated control circuit (e.g., safety relay, safety PLC) and validate the installation according to applicable safety standards.