#42 Marcela St., Damong Maliit, Brgy. Nagkaisang Nayon, Novaliches, Quezon City 1125, Metro Manila, Philippines
The SEL-4520 is used to test the SEL-751 and SEL-751A Feeder Protection Relays and other arc-flash detection relays that use light and overcurrent to sense an arc-flash event.