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Procedure - TM-9-6115-464-34_388
CAUTION - TM-9-6115-464-34_390

TM-9-6115-464-34 Generator Set Diesel Engine Driven Tactical Skid Mtd 15 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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ARMY TM 9-6115-464-34 AIR FORCE TO 35C2-3-445-2 NAVY  NAVFAC  P-8-624-34 (c)   The recording meter chart speed(s) shall be 12 inches per minute throughout the remainder of this test. At each of the following load conditions (one step) operate the set for a minimum of 40 seconds (or the short-term stability period plus the allowable recovery time as specified in the procurement document). During each load condition read and record all instrument readings except thermal instrumentation (for three-phase sets it is not necessary to record line-to-line voltages). Each load condition shall be applied to the generator set in one step at the end of the short-term stability period for the previous load condition. The load conditions are: 1. Rated load 2. No load 3. Rated load 4. No load 5. Rated load 6. No load 7. Rated load 8. No load 9. 3/4 rated load 10. No load 11. 3/4 rated load 12. No load 13. 3/4 rated load 14. No load 15. 1/2 rated load 16. No load 17. 1/2 rated load 18. No load 19. 1/2 rated load 20. No load 21. 1/4 rated load 22. No load 23. 1/4 rated load 24. No load 25. 1/4 rated load 26. No load 27. Rated load 28. No load 29. Rated load 30. No load 31. Rated load 32. No load (d) Repeat (a) through (c) for all voltage connection(s) and frequency(ies). d. Results. (1)    Prepare a chart giving for each load change the momentary overshoot or undershoot and the recovery time. For each constant load, give the maximum voltage variation. (2)   Referring to figure 4-1 begin by determining the observed (B) and steady-state (D) voltage bandwidths. (a)   Mark numerically the stabilizations occurring after each load change, starting with the stabilization   obtained before the first load change. (b)   Determine the observed voltage bandwidth (B) by marking the maximum trace excursion and minimum trace excursion in the stabilized portion. Draw two lines parallel to the axis of chart movement, one each passing through these maximum and minimum trace excursions respectively. (c)   Draw a line (C) parallel to and equidistant from the edges of the observed voltage bandwidth. Determined in (b) above. (d)   Using the rated voltage of the generator and given requirements of table 4-1, calculate the steady-state voltage bandwidth (D). Draw this steady-state voltage bandwidth as two parallel lines, parallel to and equidistant from the median (C) at the observed voltage bandwidth. 4-12







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