380-480VAC AC Power Supply Standard

Module Feature

380-480VAC is a universal three-phase AC voltage class for global heavy industrial automation.

It covers regional supply variations from 380V, 400V, 415V up to 480V. Equipment rated for this range can work without hardware modification across most Asian, European and American industrial sites. It is commonly used for VFDs, pumps, compressors, MCC panels and large PLC rack power supplies.

Working principle

Grid transformer provides balanced three-phase sinusoidal AC voltage.

The voltage amplitude changes according to local distribution standards, while the equipment internal power stage adapts via wide-range rectifier circuits. Proper phase sequence and voltage balance must be maintained for stable operation of power semiconductor devices.

Onboard components

Not applicable, this is an electrical specification parameter.

LED indicators

Not applicable.

Hardware self‑diagnosis

Diagnosis is handled by connected electrical equipment, monitoring phase loss, unbalance, overvoltage and undervoltage conditions.

Programming software

Not applicable.

Electrical & Process Parameters

Model:380-480VAC Brand:General industrial specification Device type:Three-phase AC power supply range Function:Main power input for heavy-duty industrial automation equipment

Mechanical & Structure

Mounting:Supplied via power cables and busbars Protection class:Dependent on connected devices Housing:Not applicable

Environmental

Operating temperature:-25℃ ~ +70℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, IEC

Status:Standard industrial electrical rating

Installation

Verify actual site voltage falls within 380-480VAC before powering devices.

Check phase balance and ground connection to avoid equipment damage.

Interface

Three phase L1/L2/L3 terminals, protective earth terminal.

Diagnostic

Undervoltage trip: Grid sag, loose main connection or transformer overload.

Overvoltage trip: Grid surge, incorrect tap setting or light load on transformer.

Phase loss alarm: Broken fuse, open cable conductor or contact failure.

Product Brief

380-480VAC, three-phase industrial AC voltage rating for variable frequency drives, motors and process control equipment.