Specifications

Distribution Products Catalog CA08101001E—October 2010 www.eaton.com 105
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16.6
Tr a n s f er Switches
Standard and Optional Features
32A. Time Delay Neutral
Provides a time delay in the
neutral position during the
transfer and retransfer
operations during which both
Source 1 and Source 2 are
disconnected from the load
circuit. This allows inductive
loads time to reach a safe
voltage and eliminate back
EMF. The time delay is
programmable and is the
same for both transfer and
retransfer operations. This is a
passive feature that requires
the consulting engineer/
installer to determine the
settings based on how the
user will operate the facility.
Adjustable 0–120 seconds.
32B. Load Voltage Decay
Provides load voltage
measurement to sense back
EMF that is generated when
the transfer switch is the
neutral position. It provides
a delay in transfer in either
direction if an unacceptable
level is sensed as established
by a programmed set point.
This is an active feature that
adapts to how the facility is
operating in order to minimize
neutral position wait time,
but ensure safety. Adjustable
2–30% of nominal voltage.
32C. In-Phase Transition With
Default to Load Voltage Decay
Provides in-phase transition,
which is a feature that will
permit a transfer or retransfer
between two available
sources that have a phase
angle difference near zero.
The in-phase transition
feature includes permissible
frequency difference and
synchronization time set
points. In the event Source 1
and Source 2 fail to
synchronize within the
permitted frequency
difference and time, then
the controller defaults to the
load voltage decay operation
as described in Feature 32B.
Adjustable frequency
difference 0.0–3.0 Hz.
Adjustable synchronization
time allowance 1–60 minutes.
32D. In-Phase Transition With
Default to Time Delay Neutral
Provides in-phase transition,
which is a feature that will
permit a transfer or retransfer
only between two available
sources that have a phase
angle difference near zero.
The in-phase transition feature
includes permissible
frequency difference and
synchronization time set
points. In the event Source 1
and Source 2 fail to
synchronize within the
permitted frequency
difference and time, then the
controller defaults to the time
delay neutral operation as
described in Feature 32A.
Adjustable frequency
difference 0.0–3.0 Hz.
Adjustable synchronization
time allowance 1–60 minutes.
32F. In-Phase Transition
Provides in-phase transition,
this feature will permit a
transfer or retransfer
between two available
sources that have a phase
angle difference of 8 degrees
or less. The in-phase transition
feature includes permissible
frequency difference and
synchronization time set
points. In the event Source 1
and Source 2 fail to
synchronize within the
permitted frequency
difference and time, the
Alarm relay will energize
and “Failed to Sync” will be
displayed on Line 1 of the
controller. After resetting
the alarm, another in-phase
transition
may be attempted
or a non-synchronized
transfer
may be initiated by failing
the connected source. The
adjustable frequency
difference is 0.0 to 3.0 Hz.
If the synchronization does
not occur within a specified
amount of time, the Alarm
relay will energize and the
failure will be logged into
the transfer history as either
“Sync Fail - Freq” or “Sync
Fail - Phase” depending on
whether the frequency
difference or the phase
difference was excessive.
32G. Time Delay Neutral
This feature provides a time
delay in the neutral position
during the transfer and
retransfer operations during
which both the utility source
and the generator source are
disconnected from the load
circuit. TDN cannot be
implemented on a transfer
switch using a 2-position
contactor.
Jumper selectable at
disable (0 seconds) or
enable (2 seconds).
47. Transfer Modes for Closed
Transition Transfer Switches
Provides available transition
transfer modes for a closed
transition transfer switch.
Closed transition is a “make
before break” transfer and
retransfer scheme that will
parallel (a maximum of 100
ms) Source 1 and Source 2
providing a seamless transfer
when both sources are
available. The closed
transition feature includes
permissible voltage difference
frequency difference and
synchronization time
allowance set points. The
phase angle difference
between the two sources
must be near zero for a
permitted transfer. These are
all programmable set points
in the controller.
47C. Closed Transition
With Default to In-Phase
Transition With Default to
Load Voltage Decay
Provides a closed transition
transfer as the primary
transfer mode. In the event
Source 1 and Source 2 fail
to synchronize within the
permitted voltage difference,
frequency difference, phase
angle difference and time,
then the controller defaults to
the in-phase transition with
default to load voltage decay
operations as described in
Features 32C and 32B.
Adjustable frequency
difference 0.0–0.3 Hz.
Adjustable voltage difference
1–5%
volts. Adjustable
synchronization
time
allowance 1–60 minutes.
47D. Closed Transition
Provides a closed transition
transfer as the primary
transfer mode. Only under
a fail-safe condition (i.e., loss
of the connected source) will
the controller transfer to the
alternate source using the
load voltage decay operation
as described in Feature 32B.
Adjustable frequency
difference 0.0–0.3 Hz.
Adjustable voltage
difference 1–5% V.
47E. Closed Transition
With Default to In-Phase
Transition With Default to
Time Delay Neutral
Provides a closed transition
transfer as the primary
transfer mode. In the event
Source 1 and Source 2 fail to
synchronize within the
permitted voltage difference,
frequency difference, phase
angle difference and time,
then the controller defaults to
the in-phase transition with
default to time delay neutral
operation as described in
Features 32D and 32A and .
Adjustable frequency
difference 0.0–0.3 Hz.
Adjustable voltage difference
1–5 percent volts. Adjustable
synchronization time
allowance 1–60 minutes.
Logic Extender Cable
34A. 48 Inches (1219 mm)
Provides logic extension
cable with connectors.
34C. 96 Inches (2438 mm)
Provides logic extension
cable with connectors.
34E. 144 Inches (3658 mm)
Provides logic extension
cable with connectors.
37. Service Equipment Rated
Transfer Switch
Provides the label “suitable
for use as service equipment”
and the features necessary
to meet the requirements for
the label. Includes service
disconnect with visible
indication and neutral
assembly with removable
|link. Feature 16B or 16N
must be selected separately.