This Control Concepts Islatrol I-3-415WYE 277/480V 3PH 50/60HZ Active Tracking Filter is in new, unused condition and is guaranteed to function 100%. This unit came came from a local MFG that was upgrading equipment and had surplus new stock replacement inventory. We can accept pay pal or your credit card. Please contact us with any questions. Islatrol power line filters offer the original Active Tracking technology to guard against commonly occurring, but very damaging, lower energy transients and offers excellent noise reduction. Islatrol Plus combines rugged, high energy current diverters with the Active Tracking Filter to provide protection against the full spectrum of voltage transients and surges. 3 Phase WYE 4W+ PE (G) FOR FURTHER INFORMATION PLEASE VISIT: emersonnetworkpower.com/documentation/en-us/products/surgeprotection/documents/io-30100_islatrol_series.pdf