Figure 7-6. Electric Governor Control Unit Parallel Winding Test (50/60 Hz)

Figure 7-5. Electric Governor Control Unit, Rectifier Bridge and Feedback Winding Test

TM-5-6115-545-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 30 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
Page Navigation
148

REF DES Re M2, M3 Vl V2 TEST EQUIPMENT PARALLEL WINDING TEST CONNECT GOVERNOR CONTROL UNIT TO TEST EQUIPMENT AS SHOWN. M2 SHALL READ 0-300 MA. M3 SHALL READ 600-840 MA. REVERSE POLARITY OF CONNECT- IONS TO PINS J1-E AND J1-G. M2 SHALL READ 600-840 MA. M3 SHALL READ 0-300 MA. QUANTITY DESCRIPTION 1 RESISTOR, FIXED, 50,000 OHMS, 10 WATT 2 MILLIAMMETER, DC, 0-1000 MA 1 DC POWER SOURCE 1 DC POWER SOURCE 1 AC POWER SOURCE ME 6115-545-34/7-6 Figure 7-6. Electric Governor Control Unit Parallel Winding Test (50/60 Hz) (7) The adjustment of R18 and R16 are interdependent. For any position of R18 there is an optimum position for R16. Therefore, to improve transient performance, increase the frequent y gain by turning R18 clokwise. If hunt develops, readjust R16 for stability. If no hunt develops, apply and reject load on the generator set to check for stability under transient conditions. Assuming that no hunt develops for an increase in frequency gain, (R18 turned clockwise) or that hunt can be removed by readjustment of R16, again increase frequency gain. by turning R18 clockwise and note the transient per- formance. Finally a position may be reached where no readjustment of R16 can stabilize for the high frequency gain of R18. Then reduce the frequency gain to the stable region and optimize stability and performance with R16. The frequency gain should be reduced to a point where the system is not on the edge of instability for long-term stable operation. (8) Transient performance improves as the frequency gain R18 is increased and the feedback gain R16 is a minimum for that particular position of frequency gain adjustment. If R16 is adjusted too far counterclockwise, there will be insufficient feedback to stabilize the operation at steady state. If a slow oscillation occurs, turn R16 clockwise until stability is reached. This is the optimum setting for the level of frequency gain. (9) If R16 is turned far clockwise, a very fast oscillation may occur. Turn R16 counterclockwise to the optimum point of stability. b. Parallel Operation (Class 1 sets) (1) Adjust in accordance with paragraph 16-11. (2) If the sets will not divide load, or if they oscillate (successively interchange load) on the first attempt to parallel, check the polarity across pin A and B of the parallel receptacle on both sets and verify, that the input circuits to pin C and D are correct and that the voltages are as specified. 7-9. Equipment Test If the electric governor control has been renewed or repaired, refer to Chapter 16, Section II and conduct the following tests. a. Frequency and voltage regulation, stability and transient response test, short term. (para 16-15) b. Frequency adjustment range test (para 16-16) Change 1 7-9

Privacy Statement
Press Release
Contact