Specifications

Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 59
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16.4
Tr a n s f er Switches
Magnum-Based Designs
Peak Shaving
The closed transition soft
load transfer switch can
be factory configured to
automatically parallel to the
utility. In this operation mode,
the switch will be paralleled
with the utility when the
user-adjustable load power
level is exceeded for the
predetermined amount
of time.
Test Mode Operation
Engine Run Test Mode
To perform an engine run
test, first place the System
Test switch in the “Run”
position. Next place the
Auto/Test switch in the “Test”
position. The engine start
contact will close, the engine
will start and the generator
will produce nominal voltage
and frequency.
Neither Source 1 nor Source
2 breaker will be operated.
Returning either the System
Test to “Off” position or
Auto/Test switch to “Auto”
position will remove the
“Engine Start” command.
The engine will shut down.
Transfer Test Mode
(Open Transfer)
Note: This operation is carried
out when the controller’s breaker
logic is programmed for open
transition via ATC-5000 Input 64.
To perform an open transition
test, first place the Test
Mode selector switch in the
“Mode 1” position, followed
by placing the System Test
switch in “Test” position,
followed by placing Auto/Test
selector switch in the “Test”
position. After an adjustable
time delay, the generator
will start. After the nominal
voltage and frequency are
reached, the Source 1
(normal) breaker will open
and the Source 2 (emergency)
breaker will close on the
dead bus.
Returning either the Auto/
Test selector switch to
“Auto” position or the Test
Mode selector switch to
“Off” position will cause the
system to return to normal
power as described in
“Return Of Normal Power—
Breaker Open Transition
Logic Selected.”
Transfer Test Mode
(Closed Transition)
Note: This operation is carried out
when the controller’s breaker logic
is changed
to closed transfer via
ATC-5000 Input 64.
To perform a closed transition
test, first place the Test
Mode selector switch in the
“Mode 2” position, followed
by placing the System Test
switch in “Test” position,
followed by placing the Auto/
Test selector switch in the
“Test” position. After an
adjustable time delay,
the
generator will start. After the
nominal
voltage and frequency
are reached, the generator
bus will be synchronized to
the utility across the Source 2
(emergency) breaker. When
the two sources are
synchronized the Source 2
(emergency) breaker closes
and then Source 1 (normal)
breaker opens.
Returning either the Auto/
Test selector switch to
“Auto” position or the
System Test selector switch
to “Off” position will cause
the system to return to
normal power as described in
“Return Of Normal Power—
Breaker Closed Transition
Logic Selected.”
Transfer Test Mode
(Interchange—
Soft Load Transition)
Note: This operation is
carried out when the
controller’s
breaker logic is programmed
for
interchange (soft load transition).
To perform an interchange
(soft load transition) test, first
place the Test Mode
selector
switch in the “Mode 1”
position,
followed by placing
the System Test switch in
“Test” position, followed by
placing the Auto/Test selector
switch in the “Test” position.
After an adjustable time delay,
the generator will start. After
the nominal voltage and
frequency are reached, the
generator bus will be
synchronized to the utility
across the Source 2
(emergency) breaker.
When the two sources are
synchronized, the Source 2
(emergency) breaker is
closed, and the generator
gradually assumes all load.
On completion of the load
transfer sequence, the Source
1 (normal) breaker will open.
Returning either the Auto/
Test selector switch to
“Auto” position or the
System Test selector switch
to “Off” position will cause
the system to return to
normal power as described
in “Return of Normal
Power (Switch in Closed
Transition Mode).”
Paralleling Test Mode
(Baseload)
Note: This operation is carried
out when the controller’s Breaker
Logic is changed to Parallel via
ATC-5000 Input 64 and the
Baseload operation is selected.
To perform a paralleling test
in a base load mode, first
place the Test Mode
selector
switch in the “Mode 2”
position,
followed by placing
the System Test switch in
“Test” position, followed by
placing the Auto/Test selector
switch in the “Test” position.
After an adjustable time
delay, the generator will start.
After the nominal voltage and
frequency are reached, the
generator bus will be
synchronized to the utility
across the Source 2
(emergency) breaker.
When the two sources are
synchronized, the Source 2
(emergency) breaker is
closed and the generator
gradually assumes load up
to the user-programmable
power level and then
continuously maintains its
power output.
Returning either the Auto/
Test selector switch to
“Auto” position or the
System Test selector switch
to “Off” position will cause
the generator to gradually
unload, and then the Source 2
(emergency) breaker will
open. The generator set will
continue to run for a user-
adjustable time, allowing the
generator set to run unloaded
for cool down, after which
the engine will be shut down.
Upon completion, the system
will then be ready for
automatic operation.