TM 5-6115-593-12 TO 35C2-3-463-1 Section III.  REMOTE CONTROL CABLE ASSEMBLY 5-10. GENERAL.  The remote control cable assembly is  used  to  connect  the  remote  control  module  to  the generator   set.      The   cable   assembly   may   be   of   any length up to a maximum of 1000 feet (300 m).  Refer to par. 2- 10 for additional information. Section IV.  AUTOMATIC CONTROL MODULE 5-12. GENERAL.    The  automatic  control  module  can sense    and    initiate    unattended    sequence    when    an interruption  or  deviation  in  the  normal  120V  AC  supply exceeds   allowable   values;   start   the   generator   sets; disable  and  energize  circuit  breakers,  and  exercise  the automatic    control    system.        The    automatic    control module is equipped with voltage and frequency sensing devices which are normally set for a voltage deviation of ±10  percent  and  a  frequency  deviation  of  ±3  percent, but can be reset as local conditions warrant. 5-13. FUNCTIONAL   DESCRIPTION.      (Ref.   FO-12) The ACM is designed to automatically control up to four MEP-029A, 500 KW generator sets.  The utility monitor circuit  which  includes  a  120  VAC  over/under  voltage relay   (27/59N),   under   frequency   relay   (81N-U),   over frequency relay (81N-0), 1.5-15 second (adjustable) time delay relay (TD), 50/60Hz frequency select switch and a run relay (RR), continually monitors the 120 VAC utility voltage from the line side of the utility breaker. When the utility power is normal, relays 27/59N, 81N-U and  TD  are  energized  (81N-0  will  only  energize  during an   over-frequency   condition)   and   the   normal   power available lamp will be on. If the utility power completely fails or voltage varies by more  than  ±10%  and/or  frequency  varies  more  than ±3%,  TD  relay  after  a  1.5-15  second  time  delay  will allow  all  generators  to  begin  a  start-up  cycle  providing the   generators   are   in   the   automatic   mode.      Relays 27/59N, 81N-U, TD and RR deenergize allowing 24 volts D.C. to energize the K5 engine start circuit via normally closed   contacts   TD   and   RR   through   TB4-5,   6,   7,   8 through J3-B through the automatic position of the auto- trip-manual switch (S53) on each set.  The utility breaker (located within user switchgear) will open via additional sets of RR contacts at TB3-17, 18 and 19. As  the  generators  run  up  to  speed,  each  generator's quality circuit (81G-0, 81G-U, 27/59G and CR) monitors the  condition  of  their  respective  set.    This  circuit  has identical   voltage   and   frequency   specifications   as   the utility monitor circuit in the ACM and is only completely functional if the generator set is in the automatic mode. As   each   generator   satisfies   its   own   quality   circuit, control  relay  (CR)  will  energize  and  provide  120  VAC through  J3-N  to  TB2-5,  6,  7,  or  8  to  its  applicable  MR relay  (MR1,  2,  3,  or  4)  in  the  ACM.    However,  the  first MR to be energized will lock out all other MR relays and also  provide  a  closure  to  its  generator  circuit  breaker control  circuit  via  its  applicable  normally  open  contact (TB  3-1  through  TB  3-8)  through  J3-D  and  J3-E.    The first  set  to  close  its  circuit  breaker  via  MR  will  also energize its own breaker control relay (BCR) which now disconnects its synchronizer to electric governor (2301) connection    which    is    no    longer    needed    since    this generator is already on line.  Once all other units have satisfied  their  quality  circuit  and  energized  CR,  their respective   synchronizers   will   be   energized   via   CR contacts  at  terminal  one  of  the  synchronizer.    The  fact that    all    other    MR    relays    have    locked    out    and synchronizers are now energized, enables the remaining units  circuit  breakers  to  be  closed  only  when  proper synchronization has taken place. It  should  be  noted  that  K106  sync  check  relay  (N.O. contacts 5 and 6) is always in the circuit breaker closure circuit  in  series  with  MR  closure  contacts  and/  or  the synchronizer  closure  contacts.    This  will  preclude  any set   circuit   breaker   closure,   in   automatic   or   manual unsynchronized. As  each  set  circuit  breaker  (CB2)  closes,  its'  auxiliary contacts (CB2-5 will close allowing 120 V.A.C. via J3-P to TB2-9, 10, 11 or 12 to energize each sets respective BR1-BR4  relay.    These  BR  relays  along  with  the  24 VDC 5-13