Figure 3-10.-Single-line diagram of a ship's service generator

Figure 3-10.-Single-line diagram of a ship's service generator and switchboard interconnections.

system for a large ship. This diagram along with the

presents, in simplified form, the actual switching

information in the following paragraph present the

arrangements for paralleling the generators, for

functional operation of the overall system.

supplying the different power and lighting busses, and

for energizing the casualty power terminals.

The steering gear system (fig. 3-9) consists of one

complete synchro-controlled electric hydraulic system

for each rudder (port and starboard). The two steering

EQUIPMENT WIRING DIAGRAMS

systems are similar in all respects. They are separate

systems, but they are normally controlled by the same

Equipment wiring diagrams are used to

steering wheel (helm) and operate to move both port and

troubleshoot a system or a piece of equipment

starboard rudders in unison.

effectively. Where the block diagram is useful in

presenting the functional operation of a system or

SINGLE-LINE DIAGRAMS

equipment, the equipment wiring diagram gives a

detailed representation of various components. The

Single-line diagrams are also used to present a

wiring diagram shows the relative location of resistors,

general description of a system and to show how it

transformers, diodes, terminal boards, and so on, and

functions. The single-line diagram presents more detail

how each conductor is connected in the circuit.

concerning the system than the block diagram, and thus

requires less supporting text material.

Figure 3-11, view A, shows the main motor

controller wiring diagram for the steering system in

Figure 3-10 shows a single-line diagram of the

figure 3-9, The wiring diagram could be used to

ship's service generator and switchboard connections

troubleshoot, check for proper electrical connections, or

for a destroyer. This diagram shows the type of ac and

dc generators used to supply power for the ship and

completely rewire the controller.

3-16