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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.

How it compares

Measured against everything we stock in LED Lighting Kits, at today’s prices. Recalculated every night.

Price $40.99
Pricier than about 57% of the 1,591 comparable items (median $33.99).

Specifications

Product
Brand nameGE 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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