Square D 3S40F General Purpose Transformer 3 Kva 480V

Product Description

The SQUARE D 3S40F is a single-phase, general purpose transformer rated at 3.0 kVA with a 480-volt primary input and a 120/240-volt AC secondary output. It steps down line voltage to standard utilization voltages for powering control circuits, lighting loads, and general electrical equipment. Weighing 60 pounds, this unit is built for stationary installation in commercial and industrial electrical enclosures or distribution panels. Electricians and electrical contractors install this transformer where a local step-down voltage source is required within a facility. It carries cULus and UL listings, confirming it meets recognized safety and performance standards.

This transformer is suited for use in commercial buildings, light industrial facilities, and equipment rooms where 480-volt service must be converted to 120 or 240-volt AC for branch circuit loads, control panels, or machine tool power supplies. Its single-phase configuration and compact footprint make it appropriate for retrofit installations as well as new construction electrical work. The 3.0 kVA rating handles moderate control and lighting loads without oversizing the installation.

Key Features

• 3.0 kVA power rating supports moderate control and lighting circuit loads
• 480-volt primary input steps down to 120/240-volt AC secondary output
• Single-phase configuration for standard commercial and industrial applications
• cULus and UL listed for compliance with recognized electrical safety standards
• Compact dimensions allow installation in standard electrical enclosures and panels

Compatibility

Designed as an OEM-style general purpose replacement transformer for single-phase 480-volt to 120/240-volt AC step-down applications in commercial and industrial electrical systems.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the 480-volt supply circuit before making any wiring connections. Verify that the transformer kVA rating is adequate for the connected load before energizing. Mount securely to a rigid surface or panel structure rated for the transformer weight prior to terminating conductors.