ARMY TM 9-6115-464-12
AIR FORCE TO 35C2-3-445-1
NAVY NAVFAC P-8-624-12
The reconnection board is connected to the load terminal board through a three pole, three phase main
load contactor which is electrically controlled by the circuit breaker switch on the control cubicle panel.
The main load contactor will open automatically when any of the protective devices actuates or when the
START-RUN-STOP switch on the control cubicle panel is placed in the STOP position.
The generator electrical system also contains a 125 V, 15 amp duplex convenience receptacle which is
equipped with a spring-loaded protective cover and protected by a 15-amp circuit breaker.
Generator output voltage is controlled by a solid state type regulator which is adjusted by the voltage adjust
rheostat on the control cubicle panel. Voltage sensing maybe local (at the generator set) or from a remote loca-
tion. The voltage regulator permits parallel operation of genetator sets by cross connection through the parallel-
ing receptacles on the precise generator sets. Utility sets are not interconnected but the dummy plugs must
If operating on 240/416 V and remote sensing is required, a 2:1 transformer must be
The tactical relay box, which is common to all three models, contains relays to shutdown the generator set upon
actuation of the overvoltage, short circuit, overloaded, and reverse power protective devices. It also houses the
current transformer load resistors.
The special relay box, which is found on all three models of the generator sets, contains the remainder
of the protective devices and the voltage regulator paralleling controls.
The precise relay box, which is found only on precise models of the generator set, contains the paralleling con-
trols for the electric govenor and the fixed resistors of the frequency-adjustment system. The precise relay box
of the 50/60 Hz precise model is equipped with a frequency selector switch.
4-71 VOLTAGE RECONNECTION BOARD.
(1) Remove screws and lockwashers to remove voltage reconnection board and spacers.
(2) Tag and disconnect electrical leads to voltage reconnection board assembly (Figure 4-45).
b. Cleaning and Inspection.
Clean reconnection board assembly with filtered compressed air and a soft bristle brush or wipe with
a clean, lint-free cloth lightly moistened with an approved solvent.
Visually inspect terminal board for burned or corroded terminals and links, cracked or broken insula-
tion, links and terminals, and stripped or otherwise damaged threads.
Testing. Test continuity of reconnection board links with a multimeter or similar device.
(1) Install voltage reconnection board (Figure 4-45), spacers, lockwashers, and screws.
(2) Connect electrical leads to voltage reconnection board assembly.