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Assembly. - TM-9-6115-464-34_217
Table 3-6. 400 Hz Electro-Hydraulic Governor Control Unit Resistance Test Values

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   35C2-3-445-2 NAVY  NAVFAC  P-8-624-34 (e) Turn R12 to full counterclockwise position. Reading of M2 and M3 shall be 600-1000 milliamperes and be balanced within 50 milliamperes. (f) Adjust R11 and R12 as in step (c) above and Iock for remainder of test. (4)  Perform  frequency  sensing  test  as  follows: (a) Install the governor control unit in test circuit as shown in figure 3-78. (b) Apply 57.5 to 62.5 Hz, 120 ±2 volts ac to P1-A and P1-B (375 to 425 Hz for 400 Hz units). (c) Adjust Rb so the resistance between P1-M and P.-T is 250 ohms. (d) Reduce the frequency of the applied 120 ±2 volt supply until M2 and M3 balance. The frequency shall be 57-58 Hz (375 to 425 Hz on 400 Hz sets). (e)  Adjust  Rb  so  the  resistance  between  P1-M  and  P1-N  is  250  ohms. (f) Increase the frequency of the applied 120 ±2 volt supply until M2 and M3 balance. The frequency shall be 64-65 Hz (420-425 Hz on 400 Hz units). (5)  Perform  rectifier  bridge  and  feedback  winding  test  as  follows. (a) Install governor control unit in test circuit as shown in figure 3-79. (b) Turn R14 and R15 to full counterclockwise position. (c)  M5  shall  indicate  -5  to  -7  milliamperes. (d) Adjust R14 clockwise until indication of M2 and M3 are balanced. (e) Place SW1 in the LOW position. M3 shall indicate 600 to 840 milliamperes. M3 shall indicate 0 to 300 milliamperes. M5 shall indicate less than 0 to + 1.5 milliamperes. (f) Place SW1 in the HIGH position. M2 shall indicate 0 to 300 milliamperes. M3 shall indicate 600 to 840 milliamperes. M5 shall indicate less than 0 to –1.5 milliamperes. (6)  Perform  parallel  winding  test  as  follows: (a) Install governor control unit in test circuit as shown in figure. (b) M2 shall indicate 0 to 300 milliamperes. M3 shall indicate 600 to 840 milliamperes. (c)  Reverse  polarity  of  connections  to  pins  J1-E  and  J1-G. (d) M2 shall indicate 600 to 840 milliamperes. M3 shall indicate 0 to 300 milliamperes. h.  Potting. (1) Check all connections and if any have been bored for test purposes, or if any defected components have been replaced, the effected area and components must be coated with polyurethane resin to prevent oxidation or other corrosion. The coating must be of a minimum thickness of 0.007 inch and air bubble entry into the applied polyurethane must be controlled so that the legibility of component coding and identification is not impaired. (2)  Check  connections  of  printed  circuit  board  to  cover. 3-164







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