utility reStored, tranSFer SWitch de-enerGizedAfter the preset time interval expires the circuit board will open the Wire 23 circuit to ground. The transfer relayde-energizes, it’s normally closed contacts close, and utility source voltage is delivered to the utility closing coil(C1), via Wires N1A and N2A, closed Transfer Relay Contacts 1 and 7, and Limit Switch SW2.Page 67NEUTRALCONNECTIONSWITCHSW3NOC1COMSW2VR1NC NCCOMC2VR2NOTR115B231747 93 69F2CIRCUIT 10BLACK (MAIN 1)CONTROLTRANSFERRED (MAIN 2)NEUTRAL (WHITE)NEUTRAL (WHITE)230F1N2N115B23BLACKREDN2N115B240VAC TOTO GENERATOROUTPUTPANELMAIN DISTRIBUTIONT1T2T1 T2E2E2E2E2E1E1N1AN1AN2AN2ABBBBBE1E1E1N1AN1AN1A15B23E1E2205205126126E2N1AN2AN2AAN2A240VACOUTPUTGENERATORTS TOCONTROL PANELABSW1LCCIRCUIT 9CIRCUIT 6CIRCUIT 5CIRCUIT 2CIRCUIT 1CIRCUIT 3CIRCUIT 4CIRCUIT 7CIRCUIT 8CIRCUIT 11CIRCUIT 12CIRCUIT 13CIRCUIT 14CIRCUIT 16CIRCUIT 1514 CIRCUIT LOAD CENTER12 CIRCUIT LOAD CENTER10 CIRCUIT LOAD CENTER8 CIRCUIT LOAD CENTERT1T1F30WIRE-WIREBLK +REDBC016 CIRCUIT LOAD CENTERBC-BATTERY CHARGERN-NEUTRALTR1-TRANSFER RELAYSW2,SW3-LIMIT SWITCHESTB1-TERMINAL STRIPF1,F2,F3-5A, 600V FUSEC1-UTILITY COIL & RECTIFIERC2-GENERATOR COIL & RECTIFIERSW1-AUTOMATIC TRANSFER SWITCH(16 CIRCUIT SHOWN FOR REFERENCE ONLY)LC-CIRCUIT BREAKER (LOADS)LEGENDSENSINGUTILITYINSIDEGROUND (GREEN)GROUND (GREEN)UTILITYGENERATORGROUNDDCFigure 8. Utility Restored, Transfer Relay De-energized.TRANSFER SWITCH sEctioN 3.2oPEratioNal aNalYsisPart 30G9266revA.indd 67 10/15/2008 11:27:28 AM
