IB01602019E
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Instructional Booklet
Effective: March 2010
Page
5
O&M Manual for the Eaton ATC-100
Automatic Transfer Switch Controller
32G.Time Delay Neutral (TDN)
This feature provides a time delay in the neutral position dur-
ing the transfer and re-transfer operations during which both
the Utility source and the Generator source are disconnected
from the load circuit. TDN cannot be implemented on a trans-
fer switch using a 2-position contactor.
Jumper selectable at Disable (0 seconds) or Enable (2 seconds).
32F. In-Phase Transition
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
transition feature includes permissible frequency difference and
synchronization time setpoints. In-phase transition is not cus-
tomer selectable. In-phase will be implemented on 3-phase sys-
tems but not on 1-phase systems. The "1-phase or 3-phase"
jumper will determine if In-phase transition is performed. In-
phase transition is attempted for 10 minutes on a 3-phase sys-
tem. If unsuccessful, an open transition is performed. Time
Delay Neutral (TDN) feature will be disabled for 2-position con-
tactor type automatic transfer switch. Time Delay Normal to
Emergency (TDNE) will be fixed at 15 sec and Generator Over-
frequency will be fixed at "OFF".
Section 2: Hardware Description
2.1 General
The purpose of this section is to familiarize the reader with the
ATC-100 hardware, its nomenclature, and to list the unit’s specifi-
cations.
2.2 Front (Operator) Panel
The front panel, depending on the installation, is normally accessi-
ble from the outside of a panel or door. The front panel provides a
means to:
•
alert the user to specific conditions;
•
perform an Engine Start;
•
perform a System Test; and
•
program a Generator Test.
The ATC-100 front panel serves two primary functions: output
and input (see Figure 1). The output function consists of five LED
outputs:
1. Unit Status;
2. Utility Available;
3. Utility Connected;
4. Generator Available; and
5. Generator Connected.
There are three input functions accessible through the pushbut-
tons:
1. Engine Start;
2. Set Generator Test; and
3. System Test.
