TM 5-6115-275-14 NAVFAC P-8-615-14 TO 35C2-3-452-1 constant  loads  from  no-load  to rated-load  during  any  30  to  45 second     period     of     operation. Rated  load  is  rated  kw  at  0.8 power factor. Long-term, steady-state stability The long-term steady- state frequency does not exceed +1% of  rated   frequency   at   constant loads from no-load to rated load during   any   4   hour   period   of continuous    operation.        Long- term,      steady-state   frequency deviation    is     defined     as     the amount  the  frequency  deviates from the reference (mean of the observed band) frequency determined  at  the  beginning  of the long-term stability test. Transient response Following  any  sudden  increase in load, including from no-load to rated-load, the governing system    will    reestablish    stable engine operating conditions (stable engine operating conditions    are    the    conditions specified from steady-state performance)  within  4  seconds, and     the     maximum     transient frequency    change    below    the new   steady-state   frequency   is not  more  than  3%  of  the  rated frequency. Following any sudden de- crease   in   load,   including   from rated-load     to     no-load,          the governing system will reestablish stable engine operating    conditions    within    6 seconds,    and    the    maximum transient frequency change above     the     new     steady-state frequency  is  not  more  than  5% of rated frequency. t. Voltage Regulation Specifications (Model MEP-023A). Voltage regulation The  voltage  regulation  from  no- load   to   rated   load   and   from rated-load  to  no-load  does  not exceed  4%  of  the  rated  voltage for all connections except for the single-phase,  two  wire,  240  volt connection.  For this connection, the   regulation   will   not   exceed 5% of the rated voltage. Steady-state performance At  constant  loads  from  no-load to rated load, the voltage at the set   terminals   will   not   deviate more  than  1%  from  its  average rms. (root mean square) value. Transient response Following sudden load changes  from  rated  load  to  no- load,    the    instantaneous    rms. voltage    will    remain    within    a bandwidth  of  +  30%  of  the  no- load  voltage  as  measured  by  a magnetic  oscillograph  having  a no-load voltage deflection of not less than 31/2 inches’(8.89 cm). Stable  operation  will  reestablish within    2    seconds    at    normal ambient  conditions,    and  within 4  seconds  at  250  and  +125°F. (40 and 52°C). 1-19