Greenlee LOAD BOX 120/208V & 277/480V

Helps prevent damaging effects of ferroresonance found on lightly loaded or unloaded 3-phase power systems during single phase switching. Ferroresonance 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