HPS Ballast Cross Reference:
Advance Ballast 71A8453-001D
Universal Ballast S400ML5AC5M-500K
Howard S0400-81C-211
Sola E-971-WDD-SO400
High Intensity Discharge (HID) lamps require a ballast to apply starting voltage to the lamp and establish current flow an arc between the lamp electrodes. Without a ballast, the arc will extinguish or draw increasing current until some circuit element burns up. Ballasts provide system stability by limiting the current that can be drawn.
Core and Coil ballast kits are used in over 90% of all HID lighting. Replacement high pressure sodium (HPS) ballast kits contain the appropriate core and coil, a properly rated ignitor and all components required for ballast replacement. The Keystone Ballast, core and coil, HID ballast kit is ideal for a wide variety of lighting applications, including factories, warehouses, gymnasiums and retail stores.
Keystone Ballast HPS-400A-P-KIT 400 watt sodium ballast transformer, 5-Tap, replacement high pressure sodium ballasts for 400W HPS, Core And Coil, Circuit Type CWA, high pressure sodium 400 Lamp Watts, S51 ANSI Ballast Type, 465 Input Watts, 120/208/240/277/480 Input Voltage, 60 Hz. The dimensions on this HPS ballast are 4.30" Long x 2.34" Wide x 4.80" High. This Keystone Ballast carries a 2 year warranty.
