IB ATS-C103
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Instructional Booklet
Effective: March 2012
Page
5
Instructions for Installation, Operation and Maintenance of the
Eaton ATC-800 Closed/Open Transition Transfer Switch Controller
Standard Feature 5J:
Undervoltage Monitoring for Source 2 (2UVD, 2UVP)
This feature constantly monitors Source 2 for an undervoltage
condition. When the Source 2 voltage drops to a value equal to or
below the undervoltage dropout setting, the source will become
unavailable. The source’s voltage will then have to rise to a value
that is equal to or above the pickup setting to become available
again.
Underfrequency Monitoring for Source 2 (2UFD, 2UFP)
This feature constantly monitors Source 2 for an underfrequency
condition. When the Source 2 frequency drops to a value equal to
or below the underfrequency dropout setting, the source will
become unavailable. The source’s frequency will then have to rise
to a value that is equal to or above the pickup setting to become
available again.
Standard Feature 5K:
Overvoltage Monitoring for Source 2 (2OVD, 2OVP)
This feature constantly monitors Source 2 for an overvoltage con-
dition. When the Source 2 voltage rises to a value equal to or
above the overvoltage dropout setting, the source will become
unavailable. The source’s voltage will then have to drop to a value
that is equal to or below the pickup setting to become available
again.
Overfrequency Monitoring for Source 2 (2OFD, 2OFP)
This feature constantly monitors Source 2 for an overfrequency
condition. When the Source 2 frequency rises to a value equal to
or above the overfrequency dropout setting, the source will
become unavailable. The source’s frequency will then have to
drop to a value that is equal to or below the pickup setting to
become available again.
Standard Feature 8C/8D: Transfer Time Delay Bypass
This feature allows an external pushbutton input to be used to
bypass the timer for Standard Feature (TDNE) or Standard Feature
(TDEN) individually, or both simultaneously. This feature is usually
used in testing when it is not desirable to wait for completion of
the timing sequence.
Standard Feature 23: Plant Exerciser (EXER)
This feature provides for the automatic test operation of the gen-
erator for a pre-selected weekly interval. When the test is running,
pressing and releasing the Engine Test pushbutton will cancel the
test. The day of the week, hour, and minute that exercising is
desired can be programmed into the ATC-800. The type of test,
whether a load transfer or just an engine test, can also be
selected. Load testing is fail-safe. If the generator fails during test-
ing for any reason, the ATC-800 will signal the transfer switch to
return to normal.
Standard Feature 26D: Go To Emergency
This feature enables an external contact closure to initiate a trans-
fer from the Normal Source to the Emergency Source. If the
external contact is closed and the Emergency Source fails, the
ATC-800 will transfer the load back to the Normal Source.
Standard Feature 26J:
Undervoltage Monitoring for Source 1 (1UVD, 1UVP)
This feature constantly monitors Source 1 for an undervoltage
condition. When the Source 1 voltage drops to a value equal to or
below the undervoltage dropout setting, the source will become
unavailable. The source’s voltage will then have to rise to a value
that is equal to or above the pickup setting to become available
again.
Underfrequency Monitoring for Source 1 (1UFD, 1UFP)
This feature constantly monitors Source 1 for an underfrequency
condition. When the Source 1 frequency drops to a value equal to
or below the underfrequency dropout setting, the source will
become unavailable. The source’s frequency will then have to rise
to a value that is equal to or above the pickup setting to become
available again.
Standard Feature 26K:
Overvoltage Monitoring for Source 1 (1OVD, 1OVP)
This feature constantly monitors Source 1 for an overvoltage con-
dition. When the Source 1 voltage rises to a value equal to or
above the overvoltage dropout setting, the source will become
unavailable. The source’s voltage will then have to drop to a value
that is equal to or below the pickup setting to become available
again.
Standard Feature 32F:
In-Phase Transition (2 position)
Provides In-phase transition, which is a feature that will permit a
transfer or re-transfer between 2 available sources that have a
phase angle difference of 8 degrees or less. The In-phase transi-
tion feature includes permissible frequency difference and syn-
chronization time setpoints. In the event source 1 and source 2
fail to synchronize within a specified amount of time, due to
excessive phase angle difference or frequency difference, then the
transfer will take place under delayed transition. Alarm relay will
energize and failure will be logged into the transfer history as
either “Sync Fail – Freq” or “Sync Fail – Phase” depending on
whether the frequency difference or the phase difference was
excessive. The adjustable frequency difference is 0.0 to 3.0 Hz.
Overfrequency Monitoring for Source 1 (1OFD, 1OFP)
This feature constantly monitors Source 1 for an overfrequency
condition. When the Source 1 frequency rises to a value equal to
or above the overfrequency dropout setting, the source will
become unavailable. The source’s frequency will then have to
drop to a value that is equal to or below the pickup setting to
become available again.
Optional Feature 9B: Maintenance Selector Switch (MSS)
Marked “OFF”, “ON”. This feature provides selector switch dis-
connection of control to the transfer motor thus allowing testing
of the transfer switch control logic circuitry without initiating load
transfer. Manual disconnection is standard on all Eaton transfer
switches. Positioning the MSS in the “OFF” position isolates the
control circuit from the transfer motor, permitting manual opera-
tion of the transfer switch or testing of logic circuitry without load
transfer.
Optional Feature 10: Preferred Source Selection (PRF SRC)
This feature permits the selection of either source (1 or 2) as the
Preferred or Normal Source. The Normal Source is the source that
the switch always looks to for availability so that it can transfer to
it. When two generators are selected and the switch has trans-
ferred to the Emergency Source, the ATC-800 will constantly be
waiting and attempting to start the generator on the Preferred
Source so that it may return to it. IF NONE is chosen, the Pre-
ferred Source or the Normal Source will be the source that is pres-
ently attached to the load.
Optional Feature 16: Overcurrent Protection
When integral overcurrent protection is provided for either one or
both sources, the need for separate upstream overcurrent protec-
tion, in most instances, is eliminated. With this factory installed
feature in the ATC-800, further automatic transfer operation is
locked-out until the appropriate source breaker is reset.
