Overload Relays 3RB2 Solid-State Overload Relays 3RB22, 3RB23 for high-feature applications Schematics Protection of single-phase motors (not in conjunction with internal ground-fault detection) 3RB29 06-2.G1, 3RB29 56-2TG2 3RB29 56-2TH2, 3RB29 66-2WH2 L N L N L1 L2 L3 L1 L2 L3 3RB 3RB NSB0_00302c T1 T2 T3 NSB0_00303c T1 T2 T3 M 1~ M 1~ Schematic representation of a possible application (3-phase) L1 L2 L3 N PE F3 -K1E F1 3~ NSB0_01527a 41 Siemens · 2009 6A gL/gG K1E 95 06 97 08 96/05 98/07 A1 A2 L1 L2 T1 T2 H2 H3 CLASS RESET 5, 10, 20, 30 AUTO MAN Ground 3R B29 87-2.