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IB140024EN
Instruction Booklet
Page
10
Effective: October 2014
ATC-300/900 40-400A (480/600Vac)
3-Postion Contactor Based Transfer Switch
7.
Time Delay Emergency Fail (TDEF)
This feature provides a time delay that prevents a con-
nected 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.
8D. Bypass TDNE
This feature provides one set of pushbuttons to bypass the
TDNE time delay.
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
This feature provides a white LED that, when lit, indicates
Source 1 is available.
12H. Source 2 - Available
This feature provides an amber LED that, when lit, indi-
cates Source 2 is 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.
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
Automatic Transfer Controller will begin the sequence of
operations necessary to transfer the load circuit to the
Source 2 power supply. All Feature 26 monitoring and
protection functions are Failsafe operations.
26D. Go to Source 2
This feature provides the capability for an external contact
opening to initiate a load circuit 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 con-
tact is closed or under a Failsafe condition.
26H. Phase Reversal Protection
For a 3-phase wye source, this feature monitors the phase
sequence of the sources. If a source does not have the
same ABC or CBA sequence as the phase reversal set-
point, the source will be considered “Unavailable”.
For a 3-phase delta source, this feature should be turned
off via the PHASE REV setpoint.
