Engine Test - Eaton ATC-300 Mode D'emploi

Generator Start Relay
This latching relay is the generator start relay for system con-
figurations that employ a generator as the Source 2 power
source. This relay provides a Form A contact of silver alloy
with gold flashing for closure of the generator start circuit.
The Form A contact is implemented with the Common Pin (J-
5, Pin 13) and the Normally Open Pin (J-5, Pin 14). The gen-
erator start relay contacts are rated for 5 A, 1/6 HP @ 250
Vac. The DC rating is 5 A @ 30 Vdc with a 150 W maximum
load.
Alarm Relay
The alarm relay is de-energized to indicate an absence of an
alarm state and energized to indicate the presence of an
alarm condition. Alarm conditions include the following.
1. Improper circuit breaker operation (breaker fails to open or
close within six [6] seconds)
2. Motor operator failure
3. Lockout
4. Failsafe condition
5. Aborted engine test due to Source 2 unavailability
6. Aborted plant exerciser test due to Source 2
unavailability
7. Unsuccessful in-phase transition
The alarm relay will remain energized until "Alarm Reset" is
pressed.
The full Form C contact of this relay may be wired to an
alarm annunciator panel to indicate a problem with the ATS.
The full Form C contact of this relay is implemented with the
Common Pin (J-5, Pin 8), the Normally Closed Pin (J-5, Pin
10), and Normally Open Pin (J-5, Pin 9). The alarm relay con-
tacts are rated for 10 A, 1-3 HP @ 250 Vac. The DC rating
is 10A @ 30 Vdc.
Pre-transfer Relay
This Form C relay opens/closes on a timed basis (adjustable
from 1 to 120 seconds) prior to the transfer operation
between two available sources to allow the load to be de-
energized prior to transfer in either direction. After TDNE/
TDEN times out, this relay energizes and the Pre-transfer
timer (TD PRE-TRAN) starts timing. After TD PRE-TRAN
times out, the transfer proceeds. The pre-transfer relay de-
energizes after the transfer is complete.
The full Form C contact of this relay is implemented with the
Common Pin (J-5, Pin 5), the Normally Closed Pin (J-5, Pin
7), and the Normally Open Pin (J-5, Pin 6). The pre-transfer
relay contacts are rated for 10 A, 1-3 HP @ 250 Vac. The
DC rating is 10 A @ 30 Vdc.
5.5.1.2 Transfer Operations Connections
K1 and K2 are factory wired to operate the transfer switch.
The relay contacts for each are rated for 10 A, 1/3 HP @
250 Vac. The DC rating is 10 A @ 30 Vdc.
Note: The ATC-300 Controller MUST BE properly grounded at J-5, Pin
12 for proper operation.
Output Relay K1
This Form C relay is used for control of the transfer mecha-
nism. Only the Form A contact is available for connection.
IB01602001T
ATC-300 Automatic
Transfer Switch
Controller
This Form A output is used for control of the transfer switch
motor to close the Source 1 device (i.e. circuit breaker) for
motor-operator transfer switches. The K1 relay momentarily
energizes until the ATC-300 senses that the Source 1 device
is closed, then K1 de-energizes. The K1 outputs are Common
Pin (J-5, Pin 1) and Normally Open Pin (J-5, Pin 2).
Output Relay K2
This Form C relay is used for control of the transfer mecha-
nism. Only the Form A contact is available for connection.
This Form A output is used for control of the transfer switch
motor to close the Source 2 device (i.e. circuit breaker) for
motor-operator transfer switches. The K2 relay momentarily
energizes until the ATC-300 senses that the Source 2 device
is closed, then K2 de-energizes. The K2 outputs are Common
Pin (J-5, Pin 3) and Normally Open Pin (J-5, Pin 4).
5.6 Operating Voltage and Measurements
The ATC-300 Controller operates with control power from
65 to 145 Vac. The ATC-300 operates on single and three
phase systems with selectable frequency settings of 50 or 60
Hz depending on the system ordered.
The ATC-300 can perform the time delay engine start func-
tion without control power. This is accomplished by the use
of a supercap and a latching control relay. The supercap
stays charged for several minutes to power the logic circuitry
that provides the start pulse to the latching control relay. The
latching control relay, which controls the generator, only
changes state when it receives start or stop pulses. The coil
voltage for the latching relay comes from another capacitor
that also stays charged for several minutes.
The ATC-300 Controller operates directly from the line sens-
ing inputs of the Source 1 and Source 2 power sources. The
nominal operating system inputs are from 120 to 600 Vac.
The standard system assumes that neutral is available and
that the transfer motor can therefore be powered from an
available 120 Vac source. If a neutral conductor is not avail-
able, a 120 Vac supply is created by an external transformer.
All voltage monitoring and measurements are true RMS mea-
surements.

5.7 Engine Test

The Engine Test is intended to permit the periodic perfor-
mance of tests of the system. The exact test conditions are
determined by the programmed setpoints. The operator-
selected parameters include setting the engine run time and
the Test Mode. Refer to Table 2 for test programming
details.
There are three test modes:
The factory default is set to 1 - Load Engine Test
Note: If the Source 2 power source is not programmed as a generator,
this function will be inactive.
For more information visit: www.eatonelectrical.com
Instruction Booklet
Effective: January 2006
0 No Load Engine Test;
1 Load Engine Test; or
2 Disabled.
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