ADJUSTMENT - TM-9-6115-668-13

5.13 SPEED GOVERNOR ASSEMBLY N1 MAINTENANCE.

Figure 5-26 Speed Governor Assembly N1, Location of Potentiometers.

TM-9-6115-668-13 5Kw 28VDC Auxiliary Power Unit (APU) MEP 952B Manual
Page Navigation
446

TM 9-6115-668-13 8. Remove two screws (45), two serrated lock washers (46), and two washers (47) from two standoffs (48). 9. Remove speed governor assembly N1 (43) with mounting plate (51) and resistors R100 to R102 (55 to 57) from standoffs (48). 1. Connect load bank to generator set and perform procedures in paragraph 5.53. 2. Remove cover panel over socket terminals L1 to L3 and N in control cabinet as instructed in paragraph 5.24. 3. Connect X/Y-printer to threaded pin of terminals L1, L2, L3 and N. 4. Preset potentiometers as follows (figure 5-26): LIM to position 11 INT to position 11 DER to position 11 ACT to position 12 DROOP to position 7 (full counterclockwise) GAIN to position 9 5. Start up Generator Set 150 kW as instructed in paragraph 2.5.1. Set output parameters: P = 150 kW, IL = 520 A, cos cp = 0.8. 6. Adjust settings: a. Rotate FREQUENCY ADJUST potentiometer R4 all the way clockwise and lock control knob with lever. b. Use SPD IN potentiometer to set frequency on FREQUENCY meter P5 to 416 Hz. c. Use FREQUENCY ADJUST potentiometer R4 to set frequency on FREQUENCY meter P5 to 400Hz, and lock control knob with lever. d. Rotate ACT potentiometer clockwise, until unit begins to vibrate (if necessary, tap control linkage between speed control device and fuel injection pump). e. Rotate ACT potentiometer counterclockwise until a stable condition is achieved, and unit does not begin to vibrate even if the control linkage is tapped (potentiometer pointer between 2 and 3). f. Rotate GAIN potentiometer clockwise, until unit begins to vibrate (if necessary, tap control linkage between speed control device and fuel injection pump). g. Rotate GAIN potentiometer counterclockwise, until a stable condition is achieved, and unit does not begin to vibrate even if the control linkage is tapped (potentiometer pointer between 10 and 11). h. Switch load on and off, and use INT and DER potentiometers to optimize control characteristics based on curves recorded with X/Y-printer. 7. Shut down Generator Set 150 kW No. 1 AND No.2 as instructed in paragraph 2.5.2. 8. Disconnect X/Y-printer from threaded pins of terminals L1, L2, L3 and N. 9. Install cover panel above socket terminals L1 to L3 and N in control cabinet as instructed in paragraph 5.24. 10. Disconnect load bank from Generator Set 150 kW. 5-118 Change 1

Privacy Statement
Press Release
Contact