TM 5-6115-590-12 the external load.  The RESET function of the switch is bypassed when the emergency switch is ON. f.  Output Contactor Trip Indicator Lamp. (1) Description.   A filament type press-to-test lamp with a red lens. (2)   Purpose.     Illuminates   to   indicate   that   the   output contactor  has  tripped  to  disconnect  the  external  load from the 400 Hz electrical system. g.  Main Contactor Switch. (1) Description.  A three position toggle switch. (2) Purpose.  In the CLOSE position, the switch actuates the  main  contactor  to  close  and  connect  the  external and   internal   400   Hz   electrical   load   to   the   electrical system.    In  the  OPEN  position,  the  switch  actuates  the main contactor to open and disconnect the external and internal    400    Hz    electrical    load    from    the    electrical system.    In  the  RESET  position  the  switch  resets  the protective  circuits  in  the  generator  control  panel  if  the main contactor trip light is ON. h.  Main Contactor Trip Indicator Lamp. (1) Description.   A filament type press-to-test lamp with a red lens. (2)   Purpose.      Illuminates   to   indicate   that   the   main contactor has tripped and disconnected all external and internal   400   Hz   electrical   loads   from   the   electrical system. 2-8.  Receptacle Panel Controls The  receptacle  panel  controls  are  located  at  the  top  of the   panel   (fig.      2-3).      The   description,   purpose,   and function  of  the  receptacle  panel  controls  and  described as follows: a.    60  Hz  Convenience  Receptacle  Circuit  Breaker  (fig. 2-9). (1)  Description.     A   manual   reset   type   circuit   breaker installed   in   the   electrical   circuit   to   the   two   60   Hz convenience receptacles. (2)   Purpose.      Provides   short   circuit   and   over-   load protection to the 60 Hz convenience receptacles circuit. The circuit breaker opening amperage is 15 amps. b.  Panel Illumination Lamp (fig.  2-9). (1) Description.  A hooded filament type lamp adjustable for directing the illumination on the panel. (2) Purpose.  Illuminates the electrical output connection panel for night operations.  The lamp is energized by the panel lights switch (fig.  2-4). c.  Fuel Heater Circuit Breaker (fig.  2-9). (1)  Description.     A   press-to-reset   type   circuit   breaker installed   in   a   fuel   heater   electrical   circuit   (used   with winterized units only). (2)    Purpose.       Provides    short    circuit    and    overload protection  for  a  fuel  heater  electrical  circuit  (used  with winterized   units   only).      The   circuit   breaker   opening amperage (60 amps) is marked on the reset button. d.  Water Line Heaters Circuit Breaker (fig.  2-9). (1)  Description.     A   press-to-reset   type   circuit   breaker installed in the water line heaters circuit. (2)    Purpose.       Provides    short    circuit    and    overload protection  for  the  water  line  heaters  circuit.  The  circuit breaker opening amperage (25 amps) is marked on the reset button. e.  400 Hz Convenience Receptacle Circuit Breaker. (1)  Description.     A   press-to-reset   type   circuit   breaker installed   in   the   electrical   circuit   to   the   two   400   Hz convenience receptacles. (2)   Purpose.      Provides   short   circuit   and   over-   load protection to the 400 Hz convenience receptacle circuit. The   circuit   breaker   opening   amperage   (15   amps)   is marked on the reset button. f.  Reverse Polarity Indicating Lamp. (1) Description.  A filament type bulb with a red lens. (2) Purpose.  Illuminates to indicate that an external 24V DC  power  source  has  been  connected  to  the  external DC power source connector with the polarity reversed in comparison with the power unit DC circuits. g.        Cold    Weather    Heaters    and    Battery    Activation Switches. Use only with units with winterization kit installed. h.  Remote Operation Cable Adapter. (1)  Description.    An  adapter  with  a  male  and  female side. (2)  Purpose.   Used  for  connecting  two  standby  cables together   to   gain   added   length   when   required.   The adapter is carried on this panel but is not connected to any  circuit.    It  is  to  be  removed  from  the  receptacle panel for use. 2-9.  Operation Under Normal Conditions a.      The   following   instructions   are   published   for   the information  and  guidance  of  personnel  responsible  for operation of the power plant. b.      The   operator   must   know   how   to   perform   every operation     of     which     the     power     plant     is     capable. Instructions   are   given   for   starting   and   stopping   the power   plant,   operation   of   the   power   plant,   and   for coordinating  the  basic  motions  to  perform  the  specific tasks for which the equipment is designed. Since nearly every job presents a different problem, the operator may have to vary given procedures to fit the individual job 2-10.  Starting the Power Plant a.  Preparation for Starting. (1) If the power plant is to be operated for the 2-13