Operator’s Manual
ASCO Series 300
381333-453
ASCO Power Technologies
Page 13
Generator Control Station (Figure 5)
An Engine/Generator can be manually started and
stopped via the
Engine/Generator Control
Switch
and
Synchronizing Mode Switch
.
The control switch functions are as follows:
Engine/Generator Control Switch
LOCKOUT/RESET
- When placed in this
position, the Engine Generator set is locked out
from start operation. If the Engine Generator set
was shut down due to an Engine malfunction, the
shutdown malfunction will be reset. If the Engine
is running when the switch is moved to this
position, it shall be immediately shut down
without a cool down period. If the Generator
circuit paralleling contactor was closed, it will
immediately be tripped open.
OFF/COOLDOWN
- If the Engine Generator is
running and output circuit paralleling contactor is
closed, when the switch is placed in this position
the circuit paralleling contactor will immediately
trip open and the Engine Generator set shall run
for a cool down period as set at the gen-set
controls. If the Engine is running and the output
circuit paralleling contactor is not closed, when the
switch is placed in this position, the cool down
timer is bypassed and the Engine is turned off
immediately. If the Generator controls are already
receiving an automatic start signal from the Master
Controls or subsequently receive an automatic start
signal, an alarm will sound and the Generator is
considered to be shut down and locked out. An
Engine Generator set cannot be started when the
switch is in this position.
AUTOMATIC
- With the switch in this position,
the Engine Generator set controls shall be in the
readiness for automatic operation upon receipt of
an Automatic start signal from the master controls.
The Engine Generator will start and run, and the
Generator circuit paralleling contactor will be
closed to the Generator Paralleling Bus. When an
Automatic start signal from the master controls is
removed, the Generator circuit paralleling
contactor will be tripped open and the Engine
Generator will run for cool down period.
TEST OFF-LINE
- With the switch placed in this
position, the Engine Generator set shall
immediately start and run. In this mode, the
Generator circuit paralleling contactor will remain
open and shall not be connected to the Generator
Paralleling Bus unless an Automatic start signal is
received from the master controls. If an Automatic
start signal is received, automatic operation will be
initiated as described in "Automatic". If the
Automatic start signal is removed, the Generator
circuit paralleling contactor will be tripped open
but the Engine Generator will continue to run as
long as
Test Off-Line
is selected.
TEST ON-LINE
- When placed in this position,
the Engine Generator set shall immediately start,
run and close the Generator circuit paralleling
contactor to a de-energized Generator Paralleling
Bus or synchronize to and close to an energized
bus according to the selected synchronizing mode.
If an Automatic start signal is received, the
Generator circuit paralleling contactor will remain
closed. If the Automatic start signal is removed,
the Generator circuit paralleling contactor will
remain closed and the Engine will continue to run
as long as
Test On-Line
is selected
.
Synchronizing Mode Switch (SMS)
ON
- With the switch in this position the
Automatic Synchronizer is fully automatic and
will send Raise/Lower speed signals to the
governor to control the Generators frequency, or
synchronize, with the energized Bus. When the
phase differential is less than ±5 electrical degrees,
the synchronizer will initiate a signal to the
controls to close the Generator circuit paralleling
contactor.
OFF
- With the switch in this position, the
Automatic Synchronizer is turned off. The
Automatic Synchronizer should be turned to
OFF
while attempting to manually parallel the
Generator to an energized Bus.
