f. Perform   the   operating   tests   as   indicated   in table   16-1. 16-7.  Direction  of  Rotation  Controls. With   the   generator   set   running   at   a   rated   load,   rotate the   following   controls   and   verify   their   proper   opera- tion. a. Frequency   Adjust   Control.   On   Class   1   sets clockwise   rotation   of   the   frequency   adjust   control rheostat   must   cause   set   frequency   to   increase   as   in- dicated  on  the  frequency  meter.  On  Class   2   sets counterclockwise   rotation   of   manual   speed   control must  increase  frequency. NOTE On  Class  1  sets,  set  manual  control  fuel injection  pump  lever  in  the  full  fuel  posi- tion  with  the  manual  speed  control  in  the IN   position   to   assure   mechanical   governor does  not  interfere  with  operation  of  elec- tric   governor. On  Class  2  sets,  set  manual  control  fuel injection  pump  lever  for  48  hertz  opera- tion  with  the  manual  speed  control  in  the IN  position  to  assure  set  does  not  oper- ate  at  low  speeds. b. Voltage   Adjust   Control.   Clockwise   rotation of  the  voltage  adjust  control  must  cause  set  voltage to   increase   as   indicated   on   the   voltmeter. c. Governor   Paralleling   Control   (Class   1   sets only) . Counterclockw ise  rotation  of  the   governor paralleling   control   must   cause   an   increase   in   the   sig- nal   appearing   at   the   paralleling   receptacles. d. Voltage  Regulator  Paralleling  Control.  Clock- wise   rotation   of   the   voltage   regulator   paralleling   con- trol   must   cause   that   set   to   increase   its   share   of   the total   reactive   Kva. 16-8. Reverse  Power  Protective  Device  Test. a.  Operate  two  generator  sets  in  parallel  at  no load,   with   contractors   closed. b. Lower  speed  of  set  being  tested  until  the  main contactor    opens. c. Record  the  value  on  the  kilowatt  meter  of  the other   set   at   the   moment   the   contactor   opens.   The load  contactor  of  the  set  under  test,  must  open  when power  flow  into  the  generator  exceeds  20  percent  of the   rated   value. 16-9. Low   Fuel   Protective   Device. a. Disconnect  cable  to  the  day  tank  fuel  solenoid value. b.  Operate  generator  set  at  full  load. c. The  low  fuel  protective  device  must  operate when  the  fuel  in  the  day  tank  falls  to  a  point  at  which there  is  only  enough  to  operate  the  set  at  rated  load for  one  minute. 16-10. a. 16-2 Parallel   Operation   Provisions   (Real   Power). For  Class  1  sets: (1)  Remove  the  shorting  plug. Change 4 (2)  With  rated  (60  kw)  load  on  the  generator set,  measure  the  dc  voltage  across  pins  A  and  B  of one   of   the   paralleling   receptacles   (J45,   J46   or   J47). Adjust  R28  (located  in  the  precise  relay  box  on  Mode I  sets  and  in  the  special  relay  box  on  the  Mode  II sets)  until  7  volts  dc  is  indicated  on  Mode  I  sets  and 2.4  volts  dc  is  indicated  on  Mode  II  sets.  Insure  that pin  A  is  positive. b. For   Class   2   sets. Adjust   governor   droop   in   accordance   with   paragraph 14-48 (17). 16-11. Parallel  Operation  Provision  (Reactive Power). a. Remove  the  shorting  plug. b. With  rated  load  60kw  at  .8  PF  on  the  genera- tor-set,   and   the   unit   parallel   switch   in   the   parallel position,  adjust  R29  (located  on  the  special  relay  box) until  7.2  volts  ac  is  indicated  across  pins  C  and  D  of one   of   the   paralleling   receptacles   (J45,   J46   or   J47). c. Install   the   shorting   plug. d. With  60kw  1.0  PF  load  applied  the  change  in voltage  from  no  load  should  not  exceed  1%.  With 60kw  .8  PF  load  applied  the  voltage  change,  from  no load  should  be  approximately  3%. 16-12. Malfunction   Indicator   Test. a. The   malfunction   indicator   system   is   electri- cally  isolated  and  independent  of  the  protection  sys- tem.   Testing   of   the   indicators   can   be   accomplished at   the   same   time   that   the   protective   devices   are   tested in   tests   6,9,10,11,12,14,15,16,17   and   18   of   table   16-1, b. In  the  event  that  one  of  the  indicator  circuits does  not  work,  verify  that  the  lamp  is  functional  by operating  the  test  and  reset  switch  on  the  fault  indi- cator   panel, 16-13. Phase   Balance   Test   Voltage. a.   General.   Polyphase   electrical   equipment   may not–operate  properly  or  may  be  damaged  if  the  phase voltages  of  a  polyphase  generator  differ  greatly  from each  other.  Also,  large  differences  between  the phase  voltages  of  a  polyphase  generator  may  be  an indication   that   the   generator   set   has   been   improperly manufactured   or   damaged. b.   Apparatus. A  frequency  meter  (or  tachometer) as   described   and   illustrated   in   MIL-HDBK-705, Method  104.1  (or  109.  1)  and  an  rms  indicating  ac voltmeter  having  an  accuracy  of  ±  .1%  of  the  reading shall   be   required   to   perform   both   procedures.   A means   of   separately   exciting   the   generator   is   re- quired   since   procedure   H   is   performed. c.   Generator   with   Separate   Excitation. (1)   Preparation   for   test. (a)   Completely   isolate   the   generator windings  (armature  coils  and  field  windings).