of the prime mover. The speed governors for large
meters (fig. 3-12). Synchroscopes and synchronizing
machines can be set to the required speed by a control
lamps are provided for paralleling ac generators. Also,
device mounted on the switchboard.
indicator lamps are provided to show the operating
conditions of various circuits.
When running in parallel with other generating a
generator is prevented from operating as a motor by a
which is automatically controlled by the speed governor
reverse power relay. The reverse power relay trips the
Figure 3-12.--EPCC showing distribution and system status and control sections.