Anti-override trip program for multi-level short line power supply system and its protective action principle were introduced combined transform instance of anti-override trip system of Juji Coal Mine. The program first uses fiber differential protection to transform underground tie-line. then switches to coal mine anti-override trip system based on network intelligent identification ... https://www.roneverhart.com/Roland-Blues-Cube-Stage-1x12-60-Watt-Combo-Amp-p24291/