Greenlee LOAD BOX 120/208V 277/480V 5-1

Helps prevent damaging effects of ferroresonance found on lightly loaded or unloaded 3-phase power systems during single phase switching. Ferroresonace typically occurs on medium voltage distribution transformers and power cables during single phase switching. Overvoltage leads to insulation breakdown resulting in damage to the transformer, lightning arresters andother equipment. 5,000 watt per phase loading. Resistive load up to 3 phases