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Rectangular metal ballast enclosure with side-mounted wiring terminals

GE Lighting

GE Lighting 90896 Stepdown Autotransformer Ballast 347VAC to 277VAC 375W

SKU CH-SEFM-EAV06

Step-down autotransformer ballast converts 347 VAC input to 277 VAC output for 375 W lighting loads

  • Converts 347 VAC supply to 277 VAC for compatible fixtures
  • Handles up to 375 W load for high-output lighting circuits
  • Autotransformer design provides efficient voltage step-down
  • Model 90896 ensures correct replacement for specified installations
  • New condition guarantees full factory performance and reliability

347 VAC to 277 VAC Stepdown Autotransformer

This GE Lighting ballast converts a 347 VAC supply down to 277 VAC for compatible lighting circuits. It is intended for installers and facility managers who need to run 277 VAC fixtures from an existing 347 VAC distribution system. The unit handles the voltage step-down without isolation between input and output. Model 90896 is supplied new and ready for installation.

Autotransformer wiring and load considerations

Because the device is an autotransformer, the input and output share a common winding section, so the circuit must tolerate a non-isolated connection. It frees the installer from running a separate 277 VAC feed when only 347 VAC is available at the panel. The ballast mounts in line with the fixture wiring and requires no additional control gear beyond standard overcurrent protection.

375 W capacity and voltage limits

The ballast is rated for 375 W of connected lighting load at the 277 VAC output. It comfortably handles fluorescent or LED drivers within that power envelope on a 347 VAC source. Loads exceeding 375 W or voltages outside the stated 347 VAC input and 277 VAC output ratings are not supported by this unit.

Highlights

  • Converts 347 VAC supply to 277 VAC for compatible fixtures
  • Handles up to 375 W load for high-output lighting circuits
  • Autotransformer design provides efficient voltage step-down
  • Model 90896 ensures correct replacement for specified installations
  • New condition guarantees full factory performance and reliability

Specifications

BrandGE

Questions about this item

What is the maximum load the GE 90896 autotransformer can handle continuously?

The unit is rated for 375 W output, so the connected lighting load must not exceed that figure.

How much heat does the ballast produce when running all day?

As an autotransformer it runs cooler than an isolation type, but the enclosure will become warm; allow free airflow around it.

What input voltage must the building supply for the 90896 to operate?

The ballast requires a 347 VAC supply to step down to 277 VAC for the fixtures.

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