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IB140042EN
Instructional Booklet
Page
14
Effective: May 2015
ATC-300/ 900 Breaker Based Transfer Switch
7.
Time Delay Emergency Fail (TDEF)
This feature provides a time delay that prevents a connected
Source 2 power source from being declared “Failed” in order
to override momentary generator fluctuations. If the Source
2 power source remains in the failed state then, 0.5 seconds
after the TDEF timer expires, the transfer switch will proceed
with the programmed sequence for retransfer. This time
delay is only implemented when the Source 2 power source
is a generator.
Adjustable 0 - 6 Seconds
8.
Time Delay Bypass Pushbutton
This feature provides a way (by pushing the Help and Step
pushbutton simultaneously) to bypass the TDNE (Feature 1)
and/or TDEN (Feature 2) time delays. The Time Delay
Bypass function, when activated by pushing the Help and
Step pushbutton simultaneously, will reduce any or all of the
programmed time delay to zero.
8C. Bypass TDEN
This feature provides one set of pushbuttons to bypass the
TDEN time delay. The ATC-900 has the feature that all of
the timers can be bypassed.
8D. Bypass TDNE
This feature provides one set of pushbuttons to bypass the
TDNE time delay. The ATC-900 has the feature that all of
the timers can be bypassed.
12. Power Source Annunciation
This feature provides LEDs to give switch position and power
source availability indications.
Switch Position
Provides LEDs to indicate the switch position.
12C. Source 1 - Source Connected
This feature provides a green LED that, when lit, indicates
the load is connected to Source 1.
12D. Source 2 - Source Connected
This feature provides a red LED that, when lit, indicates the
load is connected to Source 2.
Power Source Availability
Provides LEDs to indicate if a power source is available.
LEDs may be integral or separate from the controller.
12G. Source 1 - Available
For the ATC-300+, this feature provides a white LED that,
when lit, indicates Source 1 is available. For the ATC-900,
form C output relays are available.
12H. Source 2 - Available
For the ATC-300+, this feature provides an amber LED
that, when lit, indicates Source 2 is available. For the ATC-
900, form C output relays are available.
14.
Relay Auxiliary Contacts
14G. Source 1 Present:
Provides two (2) normally open and two
(2) normally closed contacts. The relay is energized when
Source 1 is available.
14H. Source 2 Present:
Provides two (2) normally open and two
(2) normally closed contacts. The relay is energized when
Source 2 is available.
15.
Switch Position Indication Contact
This feature provides a contact that indicates if the power
switching device is in the “Open” or “Closed” position.
15E. Source 1 Position Indication Contact
This feature provides 1 dry form “C” contact that indicates
the position of the Source 1 power switching device.
15F. Source 2 Position Indication Contact
This feature provides 1 dry form “C” contact that indicates
the position of the Source 2 power switching device.
23.
Plant Exerciser (PE)
This feature provides a means for automatic testing of the
engine generator set or standby power system. All pro-
grammed time delays will be performed during plant exer-
ciser operations. The ATC-900 has two independent
exercisers.
23K. Plant Exerciser Selectable – Disabled/1/7/14/28 Day Inter-
val
This feature provides for automatic test operation of the
generator. Available test cycles are daily, 7, 14, or 28 days
with duration equal to the programmed engine test time.
Programmable setpoints allow for selection of three test
cycles:
•
Engine Start/Run Only (No Load);
•
Exercise with Load Transfer; or
•
Disabled
This is a “Failsafe” operation.
26.
Source 1 - Monitoring and Protection
This feature provides Source 1 monitoring and protection
functions. If the Source 1 power supply fails, then the
ATC-300 will begin the sequence of operations necessary
to transfer the load circuit to the Source 2 power source.
All Feature 26 monitoring and protection functions are “fail-
safe” operations.
26D. Go to Source 2
This feature provides the capability for an external contact
opening to initiate a load power transfer to the Source 2
power source. This includes starting the engine/generator,
performing the programmed time delays, and the transfer
operation. Re-transfer will occur when the external contact
is closed or under a “failsafe” condition. A connection point
on the controller for the connection of an external contact is
included.
29.
Alternate Transfer Modes of Operation
Provides standard or optional transfer modes, mode selec-
tion devices, and operational methods for Transfer
Switches.
29A. Automatic Operation
Provides fully automatic transfer, re-transfer, and engine/
generator startup and shutdown operations.
