Eaton offers 3- and 4-pole tie breakers with remote operator - both circuit breakers and switch-disconnectors are available (20 to 1,250 A). In addition, an undervoltage release, an auxiliary contactor and a NA protection relay are also required. With a short-circuit breaking capacity of 50 kA, this combination can be used to supply mains with up to 2 x 1,000 kVA of transformer power.