Overview
The Advance 71A8291 is a proven magnetic ballast transformer designed for 250W high pressure sodium (HPS) lighting systems. This core & coil construction delivers the electromagnetic regulation needed to properly start and operate S50-class HPS lamps in industrial, commercial, and outdoor lighting fixtures. The ballast features a CWA (Constant Wattage Autotransformer) circuit topology, a standard in HPS ballast design, ensuring stable light output and long lamp life.
Key Features
- 250W HPS lamp capacity with S50 ANSI classification
- 4-tap input configuration: 120V, 208V, 240V, 277V
- Magnetic ballast construction for reliable, proven performance
- CWA circuit type maintains constant wattage to the lamp
- 12-inch lead wire length for flexible installation
- 295W input power draw
Technical Specifications
- Lamp Type: High Pressure Sodium (HPS)
- Lamp Wattage Rating: 250W
- ANSI Classification: S50
- Ballast Type: Magnetic, Core & Coil
- Circuit Type: CWA (Constant Wattage Autotransformer)
- Input Voltage (4-Tap): 120V, 208V, 240V, 277V
- Input Power: 295W
- Lead Wire Length: 12 inches
- Weight: 11 lbs
- Manufacturer: Philips Advance Ballast
Typical Applications
- Industrial facility lighting and high-bay fixtures
- Outdoor area lighting and parking lot illumination
- Warehouse and manufacturing plant lighting
- Street lighting and security fixtures
- Retrofit and replacement ballast installations
- Industrial control & general-purpose transformer applications
Compatibility & Replacements
Compatible With
- 250W high pressure sodium (HPS) lamp fixtures
- S50-class HPS lamps per ANSI standards
- Single-lamp HPS fixture configurations
- Electrical systems rated for 120V, 208V, 240V, or 277V input
- Standard magnetic ballast fixture wiring schemes
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or fixture manufacturer before ordering to ensure electrical specifications and mounting configurations match your application.
Works With
- Standard HPS lamp fixture assemblies
- Constant wattage autotransformer (CWA) circuit designs
- 120V, 208V, 240V, and 277V single-phase or three-phase systems
- Industrial and commercial lighting control systems
- Existing core & coil ballast fixtures
