wc_tx003620gb_FM10.fm118Mobile GeneratorHow to Connect Loads11.2 Best Practices for Balancing LoadsBackground Three-phase (3Ø) loads are, by their nature, balanced. It is when single-phase(1Ø) loads are combined with existing 3Ø loads that an unbalanced condition canoccur. Dedicated 1Ø loads may also be unbalanced if the loads are not equallydistributed between the legs (L1 and L3) of the generator.The sensing wires of the generator’s voltage regulator are connected to L1 and L3.Having the loads balanced between L1 and L3 allows the generator to providevoltage that is more consistent with the voltage needs of the equipment connectedto it.3Ø Situations When combining 1Ø loads with 3Ø loads (voltage selector switch in 208/240Vposition), unbalanced loads can be detected by observing the genset controllerLCD panel. If an unbalanced load condition exists, there will be a significantdifference in both voltage and amperage between the phases.Observe the amp draw on P1, P2, and P3.If an unbalanced load is detected, stop the engine and reconnect the loads so thatloads (amp draw) are more equally distributed. This will also help equalize thevoltage for each phase.When connecting multiple 120V 1Ø loads to the lugs while in 208/240V 3Ø mode,use L1 as “hot” for the first load (or heaviest load). Use L3 as “hot” for the secondload (or next heaviest load), and use L2 as “hot” for the third load (lightest load). Ifadditional loads are to be connected, repeat the connection sequence L1, L3, andthen L2.This procedure continues on the next page.WARNINGElectric shock hazard. High voltage can cause serious injury or death.► Connections must be made by a qualified electrician.208 P1 24 60100% 175 60 13208 P2 24 60100% 175 60 13208 P3 24 60100% 175 60 13wc_gr0115433Ø LOW WYEObserve P1, P2, P3
