Square D 500SV46B Buck Boost Transformer 0.5 Kva Nema 3R

Product Description

The SQUARE D 500SV46B is a single-phase buck boost transformer rated at 0.5 kVA, designed to make small voltage corrections in AC distribution circuits. It accepts 120 or 240 volt input and delivers a 16 or 32 volt output at 60 Hz, allowing it to buck (lower) or boost (raise) line voltage by a fixed increment when wired in an autotransformer configuration. The unit carries a NEMA 3R enclosure rating, making it suitable for both indoor and outdoor installations where protection from rain and ice is required. Licensed electricians and electrical contractors are the primary installers of this device in commercial and light industrial settings.

Buck boost transformers like the 500SV46B are commonly installed where line voltage deviates from equipment nameplate requirements by a small percentage. Typical applications include voltage correction for motors, HVAC equipment, lighting circuits, and other single-phase loads that require a stable supply voltage. The NEMA 3R enclosure allows surface mounting in protected outdoor locations such as rooftop equipment pads, utility rooms, and mechanical spaces. RoHS compliance makes this unit suitable for projects with restricted substances requirements.

Key Features

• 0.5 kVA power rating for small single-phase voltage correction circuits
• 120 or 240 volt input with 16 or 32 volt output windings for flexible autotransformer configurations
• NEMA 3R enclosure rated for indoor and outdoor use, including rain and ice exposure
• Single-phase, 60 Hz design matches standard North American AC distribution
• RoHS compliant construction

Compatibility

Designed as an OEM-style replacement or new-installation buck boost transformer for single-phase 60 Hz electrical distribution systems requiring small voltage adjustment at 120 or 240 volt supply circuits.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lock out the circuit before making any wiring connections. In an autotransformer wiring configuration, input and output terminals must be connected correctly per the manufacturer wiring diagram to achieve the intended voltage correction. The NEMA 3R enclosure must be mounted with the conduit entries oriented to maintain the enclosure rating.