c. On operating generator set

TM 9-6115-662-13&P c. d. e. f. g. h. On operating generator set (generator 1), set UNIT-PARALLEL switch (16, figure 2-9) to PARALLEL. Start generator set 2. Adjust voltage and frequency to match generator set 1. At switch box, set generator set 2 ON-OFF switch (3 or 6) to ON (Switch box STATUS and ON LINE lights for both generator sets should be lit). At generator set 2 control panel: (1) (2) (3) (4) Set UNIT-PARALLEL switch (16) to PARALLEL. Both SYNCHRONIZING LIGHTS (12) should be going bright to dark together. CAUTION If synchronizing lights on generator set 2 do not go bright and dark in unison, the phasing is wrong. Shut down generator sets and check that load cables are connected properly. Failure to observe this caution can result in damage to generator sets. Increase frequency until SYNCHRONIZING LIGHTS (12) blink together one or more times per second. Decrease frequency until SYNCHRONIZING LIGHTS (12) blink together once every 3-4 seconds. While both synchronizing lights are dark, position and hold AC CIRCUIT INTERRUPTER switch of generator set 2 in-the CLOSED position until indicator lights. SYNCHRONIZING LIGHTS should go out (both generators are now operating in parallel). Once both of the generator sets are on line and supplying power to the load in parallel, perform the following steps to transfer the load. (1) At the control panel of the generator set that is to be taken off line (generator set 1), set the AC CIRCUIT INTERRUPTER switch to the OPEN position. Set UNIT-PARALLEL switch to UNIT, MASTER SWITCH to OFF. (At switch box, STATUS and ON-LINE lights for generator taken off line should go off.) (2) At the control panel of the running generator set (generator set 2), place the UNIT-PARALLEL switch to UNIT. The load has now been transferred. Perform the generator PMCS listed as DURING for generator set 2 and AFTER for generator set 1. 2-40