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 (dropout + 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 (dropout + 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.
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