Figure 6-3.Steering system block diagram.
The following paragraphs explain a normal
operating setup for pilothouse steering control of the
PORT SYSTEMMain and servo pump motors #2
operating; port receiver selector switch to #2 position,
steering gear port cable select switch to the port cable
position; IC cable selector switch (port system section)
to the port cable position; and IC and pilothouse
transmitter selector switches to the pilothouse position.
STARBOARD SYSTEMMain and servo pump
motors #1 operating; starboard receiver selector switch
to the #1 position; steering gear starboard cable selector
switch to the starboard cable position; and IC cable
selector switch (starboard system section) to the star-
board cable position.
When the control switches are set up in this manner,
the motor and stator leads of the synchro transmitter at
the pilothouse steering station are paralleled with the
rotor and stator leads of the starboard #1 and port #2
synchro receivers in the steering gear room. 450 volts
single phase is applied to the stator leads from main
motor controllers #1 and #2. (The synchros have two
stator and three rotor leads.) Due to synchro action, the
receiver rotors will now follow all movements of the
transmitter rotor and thus actuate the hydraulic system
to move the rudders in response to the helm.
SINGLE-LINE DIAGRAM.This type of dia-
gram shows a general description of a system and how
it functions. It has more detail than the block diagram;
therefore, it requires less supporting text.
Figure 6-4 shows a single-line diagram of the ships
service generator and switchboard connections for a
destroyer. It shows the type of ac and dc generators used
to supply power for the ship. It also shows in simplified
form actual switching arrangements used to parallel the
generators, to supply the different power lighting
busses, and to energize the casualty power terminals.
EQUIPMENT WIRING DIAGRAM.Earlier
in this chapter, we said a block diagram is useful to
show the functional operation of a system. However, to
troubleshoot a system, you will need wiring diagrams
for the various equipments in the system.
The wiring diagram for a particular piece of electri-
cal equipment shows the relative position of the various
components of the equipment and how each individual
conductor is connected in the circuit. Some examples
are coils, capacitors, resistors, terminal strips, and so on.