Instructional Booklet
Page
22
Effective: March 2021
Operation and Maintenance Manual,
Automatic Transfer Switch Controller, ATC-900
For more information visit: www.eaton.com
IB140012EN
Table 7. Programmable Features/Setpoints.
OPTION
NUMBER
DESCRIPTION
RANGE
FACTORY
DEFAULT
General settings
— Set
new
password
0000–9999
0900
—
Nominal frequency
50 or 60 Hz
As ordered
— Nominal
voltage
120–600V
As
ordered
— Number
of
phases
1
or
3
As
ordered
— Number
of
generators
0,
1
or
2
1
—
Preferred source
Source 1, Source 2, External*or
None
Source 1
— PT
ratio
2:1–500:1
As
ordered
— CT
ratio
200–5000
—
— Daylight
Saving
Time
On
or
Off
1
— Operating
mode
Stand-alone/Primary
or
Second-
ary*
Primary
—
Phase sequence check
ABC, CBA or Off
Off
— Commitment
to
transfer
in
TDNE
Yes
or
No
No
— Manual
retransfer
Auto,
Manual*
or
External
*
Auto
Modbus Configuration
Enabled/Disabled
Enabled
— Modbus
address
1–247
1
— Modbus
baud
rate
0
=
9600,
1,
Even
0
1 = 9600, 1, Odd
—
2
=
9600,
2,
None
—
3
=
9600,
1,
None
—
4
=
19,200,
1,
Even
—
5
=
19,200,
1,
Odd
—
6
=
19,200,
2,
None
—
7
=
19,200,
1,
None
—
—
Modbus Writes
Enabled/Disabled
Enabled
—
Time Sync
Off, w PLC, w Meter , via Modbus Off
Transition settings
—
Unprogrammed
Standalone
Open or
Closed
47 Closed
transition
Closed transition
Disabled, On to Alarm, On to Open As ordered
Closed voltage difference
1–5%
2%
Closed frequency difference
0.0–0.3 Hz
0.3
32f/32d Open—in-phase
transition
In-phase
Disabled, On to Alarm, On to Open As ordered
In-phase frequency difference
0.0–3.0 Hz
1.0
— Synchronization
timer
1–60
minutes
5
32a/32d Open—delayed
transition
Time delay neutral
0-10 Minutes
0
Load voltage decay
2–30% of nominal voltage
6%
Time delays
1a Time
delay
normal
to
emergency
0–9999
seconds
0:00
3a Time
delay
emergency
to
normal
0–9999
seconds
5:00
35A Time
delay
pre-transfer
0–120
seconds
0:01
1C
Time Delay Normal Disconnect
1-10 sec
0
1D
Time Delay Normal Reconnect
0-60 sec
0
3C
Time Delay Emergency
Disconnect
0-10 sec
0
3D
Time Delay Emergency Recon-
nect
0-60 sec
0
35C Time
delay
post-transfer 0–120
seconds
0:10
Table 7 is continued in column 2 of this page
2A Time
delay
engine
1
start 259
Minutes
**
0:03
— Time
delay
engine
2
start 259
Minutes
**
0:03
4A Time
delay
engine
cool-off 0–9999
seconds
5:00
7A
Time delay engine fail timer
0–60 seconds
0:06
—
Unbalance/phase loss time delay 0–30 seconds
0:20
** Any TDES value above two minutes, with no power on the controller, will start the genera-
tor (fail-safe) after two minutes.
Source settings (Both sources have the same ranges and defaults)
26/5-J
Source 1/2 undervoltage dropout
70–97% of nominal
80%
Source 1/2 undervoltage pickup
(d 2%)
to 99% of nominal
90%
26/5-K
Source 1/2 overvoltage dropout
105–120% of nominal
(0 = disabled)
115%
Source 1/2 overvoltage pickup
103% of nominal to
(dropout - 2%) (0 = disabled)
110%
26/5-J,K Source 1/2 underfrequency drop-
out
90–97% of nominal
(0 = disabled)
94%
96%
Source 1/2 underfrequency pickup (d 1 Hz) to 99%
of nominal (0 = disabled)
26/5-N Source 1/2 overfrequency dropout 103–110% (0 = disabled)
106%
104%
Source 1/2 overfrequency pickup 101% to (dropout - 1 Hz)
(0 = disabled)
26/5-L Source
1/2
percent
for
unbalanced
voltage dropout
5–20% neg./pos. sequence voltage
V2/V1 (0 = disabled)
12%
Source 1/2 percent for unbalanced
voltage pickup
3% to (dropout - 2%)
(0 = disabled)
10%
26/5-M
Source 1/2 voltage phase loss
dropout
20-60% V2/V1 (0 = disabled)
40%
Source 1/2 voltage phase loss
pickup
18% to (dropout - 2%) (0 = dis-
abled)
30%
-
Load current unbalance dropout
5-60% neg./pos. sequence current
I2/I1 (0 = disabled)
0
-
Load current unbalance pickup
3% to (dropout - 2%) (0 = disabled) 0
-
Load current unbalance enable
threshold
1-100% of rated current
0%
Engine test/plant exerciser (PE1 and PE2 are independently programmable)
6B Engine
test
pushbutton
on
panel
Load
transfer
30 minutes
Test mode
No load, load transfer, external*,
disabled
Engine run test time
0–600 minutes
23M PE
time
delay
normal
to
emergency
0–9999
seconds
00:02
PE time delay emergency to normal 0–9999 seconds
00:02
PE time delay engine cooldown
0–9999 seconds
5 minutes
PE1/PE2 test mode
No load, load transfer, external*,
disabled
Disabled
PE1/PE2 run time
0–600 minutes
30 minutes
PE1/PE2 schedule
Off, daily, 7-day, 14-day, 28-day or
calendar date (up to 12 user-speci-
fied dates)
PE1/PE2 calendar date
Month: 1–12; Day: 1–31
PE1/PE2 day of week
1 Sunday, 2 Monday, 3 Tuesday, 4
Wednesday, 5 Thursday, 6 Friday or
7 Saturday
PE1/PE2 plant start time
HH:MM AM/PM
*
Requires the associated programmable input to be configured/connected.
