IM05805022K
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Instruction Booklet
Effective: January 2012
Page
5
ATC-300+ Automatic
Transfer Switch Controller
6.
Test Operators
Eaton ATSs are provided with a Test Pushbutton that simu-
lates a loss of the Source 1 power source as standard. All
programmed time delays (TDNE, TDEN, etc.) will be per-
formed as part of the Test. Engine run time of the Test is
equal to the Plant Exerciser programmed setpoint. All Tests
are Failsafe protected.
6B.
Test Pushbutton
Programmable setpoints include:
1. Load, No Load Testing, or Disabled and
2. Engine run time is equal to the Plant Exerciser
setting.
7.
Time Delay Emergency Fail (TDEF)
This feature provides a time delay that prevents a con-
nected emergency 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
re-transfer. 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 and/or
TDEN time delays. The Time Delay Bypass function, when
activated by pushing the Help and Step pushbutton simulta-
neously, will reduce any or all of the programmed time
delay to zero.
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.
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, indicates
Source 2 is available.
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
Interval
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 neces-
sary to transfer the load circuit to the Source 2 power
source. 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 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.
