ARMY *TM 9-6115-464-34 AIR FORCE TO-35C2-3 ... - Igor Chudov

ARMY TM 9-6115-464-34AIR FORCE TO 35C2-3-445-2NAVY NAVFAC P-8-624-34(c) The recording meter chart speed(s) shall be 12 inches per minute throughout the remainderof this test. At each of the following load conditions (one step) operate the set for a minimum of 40seconds (or the short-term stability period plus the allowable recovery time as specified in theprocurement document). During each load condition read and record all instrument readings exceptthermal 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-termstability period for the previous load condition. The load conditions are:1. Rated load2. No load3. Rated load4. No load5. Rated load6. No load7. Rated load8. No load9. 3/4 rated load10. No load11. 3/4 rated load12. No load13. 3/4 rated load14. No load15. 1/2 rated load16. No load17. 1/2 rated load18. No load19. 1/2 rated load20. No load21. 1/4 rated load22. No load23. 1/4 rated load24. No load25. 1/4 rated load26. No load27. Rated load28. No load29. Rated load30. No load31. Rated load32. 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 therecovery 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) voltagebandwidths.(a) Mark numerically the stabilizations occurring after each load change, starting with the stabilizationobtained before the first load change.(b) Determine the observed voltage bandwidth (B) by marking the maximum trace excursion andminimum trace excursion in the stabilized portion. Draw two lines parallel to the axis of chartmovement, 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 thesteady-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