When the internet is down

Grid Defender.

Faults incoming from the far end of the line. Drop breakers, fuses and SPDs on the single-line diagram to intercept them before they hit the substation. Each protection device matches one fault type.

Substation100

Score0

Credits50

Best0

Hold the line.

Red faults = short-circuit, stopped by MCB. Amber = overload, stopped by Fuse. Cyan = transient, stopped by SPD. Wrong device: fault passes through.

1/2/3 Select CLICK Place on line P Pause SPACE Start

← Back to games Best score persists in this browser