Commission Testing
Test an arc-flash detection (AFD) system using the SEL-4520. The SEL-4520 is the ideal testing tool for the commission testing of optical arc-flash protection relays. Pressing the “TST” pushbutton provides a synchronized light flash and current source to the relay under test. In an appropriately configured relay, this test will result in an arc-flash trip. The relay’s front-panel targets, SER data, and event reports can all be used to verify proper operation of the relay’s arc-flash detection elements.