TM 5-6115-593-12 TO 35C2-3-463-1 Table 2-6.  Automatic Control Module, Controls and Instruments FIGURE, NORMAL INDEX NO. CONTROL AND INSTRUMENT FUNCTION READING/SETTING 2-19,1 UTILITY POWER AVAILABLE Indicates availability ON LAMP of utility/bus voltage within proper limits. 2-19,2 MODE SELECTOR switch Selects whether load T.D. Return will be transferred back to utility after a predetermined time delay, instantly, or will not transfer at all until manually selected. 2-19,3 FREQUENCY SELECT switch Selects the proper trip As required points of the over by system and under frequency running relays. frequency. 2-19,4 A.C.  UTILITY POWER FUSE Protects wiring of —   — 15A utility monitoring circuit. 2-19,5 BR1-4 A.C.  Fuses 5A Protects wiring of BR1 —   — thru BR4 circuitry. 2-19,6 Unit 1-4 D.C.  Fuses 5A Protects D.C. 'sensing —   — wires between units 1 thru 4 and auto- matic control module. 2-19,7 MR1-4 A.C.  Fuses 5A Protects wiring of MR1 —   — thru MR4 circuitry. 2-19,8 MASTER CONTROL RELAY Closes the generator —   — (MR1-MR4) circuit breaker only on the first unit to reach acceptable voltage and frequency. 2-19,9 LOAD RELAYS LR Relay contacts will —   — 1 thru 4 and LRTD control customer load 1 thru 4 feeder breakers. LRTD time delay re- lays adjustable from 0.2 to 20 seconds. 2-19,10 OVER/UNDER VOLTAGE RELAY Senses utility voltage —   — (27/59) at 120 10%.  Trips at 108V AC (under) and 132V AC (over) voltage. 2-19,11 TIME DELAY RELAY Allows generator(s) to As desired. (SDT) continue to run (cool down) after utility power has returned. (Adjustable 1-300 sec.) 2-41