Inverter VFAS1-4055PL-WN1(R15) VFAS14055PLWN1(R15) VFAS1-4O55PL-WN1(R15) VFAS1-4055PL-WN1

VFAS1-4055PL-WN1 | Toshiba VFAS1 Series AC Inverter — 5.5kW / 380–480V 3-Phase / Simple Panel / EMC Compliant

Toshiba VFAS1 — General Purpose Inverter Series

The VFAS1-4055PL-WN1 is from Toshiba's VFAS1 general-purpose inverter series — a variable frequency drive family designed for broad industrial application coverage. Toshiba has been a significant manufacturer of variable frequency drives for industrial motor control, serving the full range from compact sub-kilowatt drives to large high-power inverter systems.

The VFAS1 series covers the standard industrial power classes. The VFAS1-4055PL-WN1 at 5.5kW addresses the widely deployed mid-range power class — a size applicable to a very large number of standard industrial fan, pump, conveyor, and machine drive applications.

Key Specifications

No Line Reactor — Installation Simplification

The "No Reactor" (WN1) specification confirms that VFAS1-4055PL-WN1 does not include a built-in line reactor. In VFD applications:

Line reactors (also called input chokes) reduce harmonic current distortion drawn from the supply, protect against supply voltage transients, and limit the rate of rise of supply current into the drive's input rectifier. They are beneficial in installations with weak supplies or where harmonic distortion is a concern.

At 5.5kW, many installations operate satisfactorily without a line reactor where the supply impedance is adequate — the drive's internal capacitors and rectifier diodes handle normal supply variations. For installations with high harmonic distortion requirements or long cable runs from the supply transformer, a separately-supplied external line reactor can be added.

Application Scenarios

Industrial fan speed control: A 5.5kW exhaust fan requires variable speed for process ventilation control. VFAS1-4055PL-WN1 provides smooth speed adjustment from minimum to full fan speed — the simple panel allows direct speed setting from the fan's mounting location.

Centrifugal pump drive: A process fluid pump with a 5.5kW motor requires variable flow rate by speed adjustment. VFAS1-4055PL-WN1 delivers energy-efficient variable speed operation compared to throttle valve flow control.

FAQ

Q1: What motor type and rating is compatible with VFAS1-4055PL-WN1?

VFAS1-4055PL-WN1 drives standard three-phase AC induction motors rated for 380–480V, 5.5kW (or smaller motors within the drive's output current capability). The motor must match the drive's output voltage class — confirm the motor's rated voltage is within the drive's output range. For variable torque (fan/pump) applications, a motor rated slightly above 5.5kW may be acceptable if configured for VT mode.

Q2: What output frequency range does VFAS1-4055PL-WN1 provide?

The Toshiba VFAS1 series typically supports output frequency from 0Hz (motor standstill) up to 400Hz maximum, with the standard 50/60Hz base frequency region covering normal motor operating speed. The frequency range is configured via the drive's parameters. Confirm the specific minimum and maximum programmable frequencies from the VFAS1 product documentation for the exact limits applicable to this model.

Q3: Can VFAS1-4055PL-WN1 be integrated with a PLC or building management system?

The VFAS1 series includes communication capabilities for PLC and supervisory system integration. Typically this includes RS485 serial communication (Modbus RTU or a manufacturer-specific protocol) as standard, with optional fieldbus modules (PROFIBUS, DeviceNet, or similar) for integration with specific PLC platforms. Confirm the available communication options from the VFAS1 documentation for this specific variant.

Q4: What protection functions does VFAS1-4055PL-WN1 provide?

Toshiba VFAS1 drives include standard protection functions: motor overcurrent protection, electronic thermal overload protection, DC bus overvoltage and undervoltage protection, output phase loss, and instantaneous power failure ride-through (where the drive maintains output for brief supply interruptions using stored DC bus energy). These functions protect both the drive hardware and the connected motor without requiring extensive external protection devices.