Instructional Booklet
Page
8
Effective: July 2010
ATC-100 Contactor Based Transfer Switch
For more information visit: www.eaton.com
IB01602017E
6.
Test Operators
Eaton ATSs are provided with a Test Pushbutton that simu-
lates a loss of the Utility power source as standard (Feature
6B). All programmed time delays (TDNE, TDEN, etc.) will be
performed as part of the Test. Engine run time of the Test is
equal to the Generator Test (Feature 23) programmed set-
point. All Tests are Failsafe protected.
6B. Test Pushbutton
Programmable setpoints include:
1. Load or No Load Testing, or Off
2. Engine run time equal to the Generator Test
(Feature 23) setting
7.
Time Delay Emergency Fail (TDEF)
This feature provides a time delay that prevents a connected
Generator power source from being declared “Failed” in order
to override momentary generator fluctuations. If the Genera-
tor power source remains in the failed state then, 0.5 sec-
onds after the TDEF timer expires, the transfer switch will
proceed with the programmed sequence for retransfer.
Fixed at 6 Seconds
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. Utility - Source Connected
This feature provides a green LED that, when lit, indicates
the load is connected to the Utility.
12D. Generator - Source Connected
This feature provides a red LED that, when lit, indicates the
load is connected to Generator.
Power Source Availability
Provides LEDs to indicate if a power source is available.
LEDs may be integral or separate from the controller.
12G. Utility - Available
This feature provides a white LED that, when lit, indicates
the Utility is available.
12H. Generator - Available
This feature provides an amber LED that, when lit, indicates
the generator 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. Generator Test
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.
23A. Generator Test Selectable – Off 7/14/28 Day Interval
(Jumper Selectable Only)
This feature provides for automatic test operation of the
generator. Available test cycles are 7, 14, or 28 days with
a 15-minute duration.
Programmable setpoints allow for selection of three test
cycles:
•
Generator Start/Run Only (No Load);
•
Generator Test with Load Transfer; or
•
Disabled
This is a “Failsafe” operation.
26.
Utility - Monitoring and Protection
This feature provides Utility monitoring and protection func-
tions. If the Utility power supply fails, then the
ATC-100 will begin the sequence of operations necessary
to transfer the load circuit to the Generator power supply.
All Feature 26 monitoring and protection functions are Fail-
safe operations.
26P. All Phase Undervoltage Protection
Undervoltage:
Dropout: 80% of nominal
Pickup: 90% of nominal
32F. In-Phase Transition
Provides In-phase transition, which is a feature that will per-
mit a transfer or re-transfer between 2 available sources that
have a phase angle difference of 8 degrees or less. The In-
phase transition feature includes permissible frequency dif-
ference and synchronization time setpoints. In-phase transi-
tion is not customer selectable. In-phase will be implemented
on 3-phase systems but not on 1-phase systems. The "1-
phase or 3-phase" jumper will determine if In-phase transi-
tion is performed. In-phase transition is attempted for 10
minutes on a 3-phase system. If unsuccessful, an open tran-
sition is performed. Time Delay Neutral (TDN) feature will be
disabled for 2-position contactor type automatic transfer
switch. Time Delay Normal to Emergency (TDNE) will be
fixed at 15 sec and Generator Overfrequency will be fixed at
"OFF".
Available only with 2-position contactor ATS
