Hubbell T2-79741S Transformer 1.5 Kva 277V to 120V

Product Description

The HUBBELL T2-79741S is a step-down control transformer rated at 1.5 KVA, converting 277 volts primary input to 120 volts secondary output. It is designed for use in commercial and industrial electrical systems where standard branch-circuit voltage must be stepped down to a usable control or lighting level. Licensed electricians install this transformer as part of panel, lighting control, or low-voltage system builds. The 1.5 KVA rating supports a range of resistive and inductive loads without oversizing the installation.

This transformer is suited for commercial buildings, warehouses, and light industrial facilities where 277-volt single-phase power is distributed from a 480-volt three-phase panel. Typical applications include stepping down voltage for fluorescent or LED lighting fixtures, control circuits, and small appliance branch circuits requiring a 120-volt supply. It fits standard transformer enclosure or open-chassis installations handled by a qualified electrical contractor.

Key Features

• 1.5 KVA capacity supports moderate control and lighting circuit loads
• 277V primary to 120V secondary step-down configuration
• Sized for commercial and light industrial electrical system applications
• Compact transformer format suitable for panel-adjacent or enclosure mounting

Compatibility

Designed as an OEM-style replacement or new-installation transformer for commercial electrical systems requiring a 277V to 120V step-down conversion at 1.5 KVA capacity.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC). Disconnect and lock out all power at the source panel before handling or wiring the transformer. Verify that the load connected to the secondary winding does not exceed the 1.5 KVA rating. Mount securely in a suitable enclosure or dedicated transformer space as required by local code.

Technical Specifications

• KVA Rating: 1.5 KVA
• Primary Voltage: 277 volts
• Secondary Voltage: 120 volts
• Configuration: Step-down

Standard Information

• Brand: HUBBELL
• Manufacturer Part Number: T2-79741S