utility reStored, retranSFer Back to utilityAs the utility coil pulls the transfer switch to an OVER CENTER position, the switch mechanically snaps to Utility.On closure of the main contacts to the utility power source side, Limit Switches SW2 and SW3 are mechanicallyactuated to “arm” the circuit for transfer to standby.Page 68Part 3 TRANSFER SWITCHsEctioN 3.2oPEratioNal aNalYsisNEUTRALCONNECTIONSWITCHSW3NOC1COMSW2VR1NC 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 9. Utility Restored, Retransfer Back to Utility.0G9266revA.indd 68 10/15/2008 11:27:29 AM
