IB140042EN
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Instructional Booklet
Effective: May 2015
Page
15
ATC-300/900 Breaker Based Transfer Switch
32.
Delayed Transition Transfer Modes for Open Transition
Transfer Switches
This feature provides delayed transition transfer modes for
an open transition transfer switch. Often used in systems
with inductive loads, a delayed transition transfer switch
may prevent or reduce inrush currents due to out of phase
switching of inductive loads.
32A. Time Delay Neutral
This feature provides a time delay in the neutral position
during the transfer and re-transfer operations during which
both Source 1 and Source 2 are disconnected from the load
circuit. The time delay is programmable and is the same for
both transfer and re-transfer operations.
Adjustable 0 - 120 Seconds
35.
Pre-Transfer, Post-Transfer, Pre & Post TransferSignal
This feature provides a signal to a remote device prior to a
re-transfer operation. It provides one Form “C” contact
(NO/NC) for interface with other equipment (typically eleva-
tor controls). The contacts close/open on a timed basis
prior to transfer in either direction. After TDNE/TDEN times
out, this relay closes and the Pre-transfer Timer (TPRE)
starts timing. After the TPRE times out, the transfer pro-
ceeds by starting the TDN timer if enabled. The pre-trans-
fer relay opens after the transfer is complete. The ATC-900
have Pre and Post transfers outputs available. The ATC-
300+ has only the Pre-transfer. Check the Controller IBs
for more information.
42.
Seismic Certification
This feature provides a Seismic certified Transfer Switch
with certificate for application in Seismic Zone 4 under the
California Building Code, the Uniform Building Code, and
BOCA.
3.5.2 Optional Features
The following is a partial list of the optional features. There are
many other options available, check with sales or the instruction
booklets for the controllers for a full set.
All features or combina-
tions of features may not be available on specific ATSs
12.
Power Source Annunciation
This feature provides LEDs to give switch position and
power source availability indications.
Overcurrent Trip Indication
Available only with integral Overcurrent Protection (Feature
16). (Shown on Automatic Transfer Controller Display.)
12LM. Source 1 and/or 2 Tripped (Requires Feature 16) Via the
controller's display.
The Automatic Transfer Controller display will read “Lock-
out” if the Source 1 circuit breaker is in the “tripped” posi-
tion.
16. Integral Overcurrent Protection
This feature provides thermal-magnetic overcurrent protec-
tion integral to the power switching device(s). All Feature
16 options include a “Lockout” function. If the power
switching breaker trips on an overcurrent condition, then
“Lockout” is displayed on the Automatic Transfer Controller
display and automatic operation is prevented until the appro-
priate source is manually reset.
16B. Integral Overcurrent Protection on Both Power Source
Switching Devices
This feature provides integral overcurrent protection on both
Source 1 and Source 2 power switching devices.
16E. Integral Overcurrent Protection on the Source 2 Power
Switching Device
This feature provides integral overcurrent protection on the
Source 2 power switching device.
16N. Integral Overcurrent Protection on the Source 1 Power
Switching Device
This feature provides integral overcurrent protection on the
Source 1 power switching device.
18. Metering
The ATC-900, with the DCT module, integrated metering is
available with appropriate CTs. Meters can also be applied
to the switch if the ATC-300+ is used.
A single ammeter is a true RMS sensing device that displays
single phase current only
The ammeter can be mounted on Source 1, Source 2, or
load. The meter can also be configured for 1, 2, or 3-phase
sensing by supplying one meter per phase for Source 1,
Source 2, or load. Ammeters for both Source 1 and Source
2 can also be grouped together.
21.
Optional Power Cable Connection Terminals
Eaton Transfer Switches are provided as standard with
Source 1, Source 2, and Load Circuit solderless screw-type
terminals for power cable connection. Alternate terminal
wire sizes may be available dependant on transfer switch
type and ampere rating.
21A. Optional Power Cable Connection Terminals
This feature provides alternate power cable connection ter-
minals. Consult Eaton for available optional terminal sizes.
29.
Alternate Transfer Modes of Operation
Provides standard or optional transfer modes, mode selec-
tion devices, and operational methods for Transfer
Switches.
29G. Automatic/Manual Operation with Selector Switch
This feature provides a 2-position selector switch (labeled
Auto/Manual) that permits selection of the automatic or
manual transfer operation mode. When in the “Auto” posi-
tion, the transfer switch operates with fully automatic trans-
fer, re-transfer, and engine/generator start up and shut
down operations. When in the “Manual” position, manual
start-up of the engine/generator and manual transfer are
required (see Section 5 for manual operation of the transfer
switch). Manual shutdown of the engine/generator are also
required. The selector switch for manual operation is pro-
vided.
Note:
Transfer switches with Feature 29G MUST be labeled as Non-
Automatic Transfer Switch Equipment.
37.
Service Equipment Rated Transfer Switch
This feature provides the label “Suitable for use as Service
Equipment” and the features necessary to meet the require-
ments for the label. It includes the service disconnect with
visible indication and neutral assembly with removable link.
Features 16B or 16N must be selected separately.
