Specifications
Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 101
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16.6
Tr a n s f er Switches
Standard and Optional Features
Feature Description
Timers
1. Time Delay Normal to
Emergency (TDNE)
Provides a time delay to allow
for the generator to warm up
before transferring the load
to the emergency source.
Timing begins only after the
Emergency Source becomes
available and is deemed good
based on the programmable
voltage and frequency set
points in the controller.
2. Time Delay Engine
Start (TDES)
Provides a time delay before
initiating the generator start
cycle. This is to account for
momentary power outages
or voltage fluctuations of the
normal source. Provides a
Form C contact to the
generator starter circuit.
3. Time Delay Emergency to
Normal (TDEN)
Provides a time delay of the
retransfer operation to permit
stabilization of the normal
source. Timing begins only
after the normal source
becomes available and is
deemed good based on the
programmable voltage and
frequency set points in the
controller. This function is fail-
safe protected.
4. Time Delay Engine
Cooldown (TDEC)
Provides a time delay before
initiating the generator stop
cycle after the retransfer
operation. This allows the
generator to cool down by
running unloaded. Timing
begins on completion of the
retransfer cycle.
7. Time Delay Emergency
Fail (TDEF)
Provides a time delay that
prevents a connected
emergency source from
being declared “unavailable”
based on the customer’s
set points. This is to account
for momentary generator
fluctuations. If the Source 2
remains in a failed state, then
0.5 second after the TDEF
timer expires the transfer
switch will proceed with the
programmed sequence for
retransfer if Source 1 is
available. This time delay is
only implemented when
Source 2 is a generator.
Note: This feature is also enabled
when large loads cause generator
output to drop below customer
set points.
Plant Exerciser
23A. Plant Exerciser
With Fail-Safe
Provides a means for
automatic testing of the
engine generator set or
standby power system. All
programmed time
delays
in the controller will be
performed
during plant
exerciser operations.
Programmable set points for
test intervals are start time,
either disabled, daily, 7, 14
or 28 days.
15-minute fixed engine
test time.
Test may be performed with
or without load transfer. Test
may be manually cancelled
during the operation. This
function is fail-safe protected.
23J. Plant Exerciser (PE)
With Fail-Safe
Provides a means for
automatic testing of the
engine generator set or
standby power system. All
programmed time
delays
in the controller will be
performed
during the plant
exerciser operation.
Programmable set points for
test interval are start time,
either disabled or 7 days,
and engine test time.
Test may be performed with
or without a load transfer.
Test may be manually
cancelled during the
operation. This is
a fail-safe operation.
23K. Plant Exerciser
With Fail-Safe
Provides a means for
automatic testing of the
engine generator set or
standby power system. All
programmed time
delays
in the controller will be
performed
during plant
exerciser operations.
Programmable set points for
test intervals are start time,
either disabled, daily, 7, 14 or
28 days, engine test time.
Test may be performed with
or without load transfer. Test
may be manually cancelled
during the operation. This
function is fail-safe protected.