TM 5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 16-17.  OVERSPEED PROTECTIVE DEVICE TEST. a. General.      Overspeeds  will  not  be  possible  to obtain due to limiting factors incorporated in the fuel injection pump. b. Overspeed Switch.  Perform a bench test on the overspeed switch to check the proper trip points. c. Functional Check.  Perform a function check of the circuit manually. Refer to AC-DC schematics. 16-18.  CIRCUIT INTERRUPTER TEST (Short Circuit). a. General.        A   circuit   interrupter   is   connected between    the    generator    voltage    reconnection system and the generator set output terminals to disconnect  the  generator  output  from  the  load and  also  to  protect  the  generator  from  a  short circuit.  The circuit interrupter is operated from a current sensor external to the interrupter. b. Apparatus.    Instrumentation  for  measuring  load conditions  shall  be  as  described  and  illustrated in  MIL-HDBK-705.    In  addition,  a  noninductive shunt;  a  short-circuiting  switch;  a  galvanometer matching networks; as oscillograph as described and illustrated in MIL-HDBK-705, Method 106.1, paragraph 106.1.3; and galvanometers having a flat frequency response (flat within plus or minus five   percent)   from   DC   to   3,000   Hz   will   be required. c. Procedure. (1) Preparation for the test. (a) Connect the load and instrumentation  in  accordance  with the  applicable  figure  of  MIL-HDBK- 705,Method 205.1, paragraph 205.1.10   for   one   for   one   voltage and frequency. (b) Connect   the   shunt,   galvanometer matching network, oscillograph, and short-circuiting  switch  as  illustrated in figure 512.1.1. (2) Test. (a) Start  and  operate  the  generator  set at   rated   voltage,   rated   frequency and rated load. (b) Set  the  oscillograph  time  marker  to a  minimum  of  0.01  seconds  or  use a  60  Hz  timing  trace  set  the  chart speed such that the individual peaks of  the  current  waveform  are  clearly visible  and  adjust  the  peak-to-peak rated current amplitude to a minimum of 0.5 inch (or approximately 12 millimeters). (c) Prior  to  closing  the  short-circuiting switch,    record    a    portion    of    the steady    state    load    for    calibration. With     the     same     load     conditions record all instrument readings. (d) With  oscillograph  still  recording  the steady state current, close the short- circuiting switch. CAUTION If   the   circuit   interrupter   fails   to operate  within  the  specified  time, remove the short circuit to prevent  damage.    Note  the  failure to operate on the data sheet. (e) The  generator  set  contains  a  short- circuit  malfunction  indicator,  check and, record its indication. (f) Repeat  steps  (a)  through  (e)  above for each possible short circuit condition (L₁-L₀,L₂-L₃, L₁-L₂-L₃ etc.) (g) Repeat  steps  (a)  through  (f)  above for both 16-14