VALVE GP-RELIEF 3527113 - Caterpillar

LMG 03 Loadshare Unit
(1) Droop potentiometer.
KG30 Governor Control Unit
(2) Maximum speed potentiometer.(4) With all load off the newly installed generator, run engine at no load-rated speed. Load the generator to 100% rated power. Slowly turn the LMG 03 droop potentiometer (1) clockwise (CW) to about the 5 mark on the scale as a starting point. The engine speed will drop. Adjust the remote speed potentiometer of the KG30 until the full load-rated speed, determined in Step 3, is reached. If the full load-rated speed can not be reached, the maximum speed potentiometer (2) inside the KG30 may have to be readjusted.(5) Slowly take all of the load off the generator. If the no load-rated speed is the same as the no load-rated speed determined in Step 3, the unit is set. If the no load-rated speed is lower than the no load-rated speed determined in Step 3, turn the LMG 03 droop potentiometer (1) slightly clockwise (CW) to add droop. If the no load-rated speed is higher than in Step 3, turn LMG 03 droop potentiometer (1) slightly counterclockwise (CCW). Repeat Steps 4 and 5 until the droop of the new generator is the same as the droop of the existing generators on the bus.(6) Repeat Step 4 and 5 for all of the new generators on the bus. The droop of each individual generator must be set the same as the existing unit(s) for accurate load sharing.(7) To verify the generators are load sharing correctly, parallel the new generators with the bus, add and remove load, and check to see that all generators are sharing load equally.C. Utility Operation - Load Adjustment, One Or More Generators Paralleled With The Utility (Infinite Bus)This setup is used to adjust the generator output when a single generator is paralleled with the utility, when multiple generators are paralleled with the utility and a single load adjustment is desired, or when multiple generators are run part time prime power (island), part time paralleled to the utility.(1) Verify "LMG 03 Basic Setup Procedure" was performed for each generator.
Basic Wiring Schematic
(1) 15K ohm fixed resistor. (2) 5K ohm potentiometer (load adjusting). (3) Relay. (4) Utility breaker.(2) To adjust the output(s) of one or more generators with one potentiometer, a 5000 ohm load adjusting potentiometer (2) is wired into only the first loadshare unit as shown. When wired as shown, the one potentiometer will adjust the output(s) of the generator(s) together by sending the same load signal to all loadshare units. If two or more generators are electrically tied together with the single load adjusting potentiometer, the generators must also be set up following "Procedure A. Prime Power (Island) Isochronous Load Sharing" to verify they are sharing load equally and that there is no load hunting.(3) Turn the load adjusting potentiometer (2) fully counterclockwise (CCW). Parallel the generator with the utility.(4) Turning the potentiometer (2) clockwise (CW) will increase the output of the generator. The generator output will be adjustable up to the rack stop