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Instruction Booklet
IB 70-8698
Instruction Manual for the Eaton RTC-100
Automatic Transfer Switch Controller
eaton Corporation
www.eaton.com
Effective December 2009
1.5 Functions/Features
The primary function of RTC-100 controller is to accurately monitor
the Utility and Generator power sources and provide the necessary
intelligence to operate the ATS in an appropriate and timely man-
ner. In addition, the RTC-100 controller provides status information
through on-board and remote indicators.
The following is a list of the features of the RTC-100 controller.
1.
Time Delay Normal to Emergency (TDNE)
This feature provides a time delay when transferring from the
Utility to the Generator power source. Timing begins when
the Generator becomes available. It permits controlled trans-
fer of the load circuit to the Generator.
Jumper selectable at 20 or 50 seconds. Default is 20 sec-
onds.
2.
Time Delay on Engine Starting (TDES)
This feature provides a time delay of the signal to initiate the
engine/generator start cycle in order to override momentary
power outages or voltage fluctuations of the utility source.
Fixed setting of six seconds (For 2 wire start only)
Some generators have their own time delay start.
3.
Time Delay Emergency to Normal (TDEN)
This feature provides a time delay of the re-transfer operation
to permit stabilization of Utility source. Timing begins when
the Utility becomes available. If the Generator fails during
timing, then re-transfer is delayed for up to 6 seconds to allow
the generator to recover.
Fixed at 10 Seconds.
4.
Time Delay for Engine Cool-down (TDEC)
This feature provides a time delay of the signal to initiate the
engine/generator stop cycle after the re-transfer operation.
This allows the engine/generator to cool down by running
unloaded. Timing begins on completion of the re-transfer
operation.
Fixed setting of five minutes.
5.
Generator Monitoring and Protection
This feature provides monitoring and protection based on the
Generator voltage setpoints. All feature 5 functions are fail-
safe operations.
5J. All Phase Undervoltage Protection
Dropout: 168 Vac (70% of 240 Vac nominal)
Pickup: 192 Vac (80% of 240 Vac nominal)
7.
Time Delay Emergency Fail (TDEF)
This feature provides a time delay that prevents a connected
Generator source from being declared “failed” in order to
override momentary generator fluctuations. If the Generator
remains in the failed state then, after the TDEF timer expires,
the transfer switch will proceed with the programmed
sequence for re-transfer (if the utility source is available).
Fixed setting of 6 Seconds
12. Power Source Annunciation
This feature provides LEDs to indicate power source
availability.
12C. Utility - Connected - EGSU Only
This feature provides a white LED that when lit, indicates the
utility is connected.
12D. Generator - Connected - EGSU Only
This feature provides a yellow LED that when lit, indicates the
generator is connected.
12G. Utility - Available
This feature provides a green LED that, when lit, indicates that
the Utility is available.
12H. Generator - Available
This feature provides a red LED that, when lit, indicates that
the Generator is available.
15N. Load Shed (Active)
Two sets of contacts are available and can be used to control
large connected loads on the generator (i.e. air conditioners,
hot tubs, etc.). The contacts are rated for 250 Vac, 5 amps.
See section 4.1.4 for connection and operation.
23K. Generator Test Selectable - Off / 7 14 / 28 Day Interval
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 jumpers 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 source fails, then the RTC-100 will
begin the sequence of operations necessary to transfer the
load circuit to the Generator power source. All Feature 26
monitoring and protection functions are failsafe operations.
26D. Transfer to Generator
This feature provides the capability for an external contact clo-
sure to initiate a transfer from Utility to Generator. After the
Generator becomes available, TDNE will time out before the
transfer to Generator takes place. Re-transfer will occur when
the external contact is opened or under a failsafe condition. A
connection point for the connection of an external contact is
provided.
26P. All Phase Undervoltage Protection
Dropout: 168 Vac (70% of 240 Vac nominal)
Pickup: 192 Vac (80% of 240 Vac nominal)
