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Compact rectangular autotransformer unit in grey metal enclosure with terminal connections visible

GE Lighting

GE Lighting GETR480/277-375W Autotransformer light kit

SKU CH-CMTR-MWY3C

Autotransformer kit steps 347 to 480 V input down to 277 V output at 375 VA with 0.85 ballast factor and UL listing

  • Handles 480/277 V input for industrial lighting systems
  • Steps voltage down to 277 V AC for fixture compatibility
  • Delivers 375 VA rated power with 0.93 power factor
  • UL Listed for safety compliance in commercial installations
  • Operates reliably from -20 °F to 50 °C ambient range

GE Lighting 375 VA autotransformer kit

This GE Lighting autotransformer steps 347–480 V input down to 277 V AC for commercial lighting circuits. It delivers a 375 VA rating with 375 W input power and a 0.85 ballast factor. The unit is UL Listed and operates in ambient temperatures from 0 to 50 °C.

Installers running 277 V fixtures on 480 V supplies

Contractors who need to power 277 V ballasts or LED drivers from a 480 V distribution panel will find this unit matches the required voltage step-down and VA capacity. Projects that demand a different output voltage, a higher VA rating, or a non-autotransformer topology should select an alternative product.

375 VA capacity with 1.354 A output current

The transformer comfortably supplies 277 V loads up to 375 VA, such as multiple fluorescent or LED fixtures within that apparent-power limit. It reaches its thermal and current ceiling at the rated 1.354 A output, so any connected load exceeding 375 VA will push the unit beyond its design headroom.

Highlights

  • Handles 480/277 V input for industrial lighting systems
  • Steps voltage down to 277 V AC for fixture compatibility
  • Delivers 375 VA rated power with 0.93 power factor
  • UL Listed for safety compliance in commercial installations
  • Operates reliably from -20 °F to 50 °C ambient range

Specifications

BrandGE CURRENT

Questions about this item

What input voltage range must my existing supply provide for the GETR480/277-375W autotransformer?

The autotransformer requires an input supply between 347 and 480 V AC to operate.

Can I keep my 277 V AC fluorescent ballasts when installing this 375 VA autotransformer?

Yes, the unit delivers 277 V AC output at up to 1.354 A with a 0.85 ballast factor, matching standard 277 V ballast requirements.

How do I confirm the autotransformer is working correctly after wiring it?

Verify the output measures 277 V AC under load, the input current stays near 0.84 A at 480 V, and the lamp operates at the expected 0.85 ballast factor.

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