Eaton ATC-900, Operation And Maintenance Manual

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Instructional Booklet
Page
42
Effective: March 2021
Operation and Maintenance Manual,
Automatic Transfer Switch Controller, ATC-900
YELLOW BAR FLASHING MESSAGES
1 Overvoltage Indication of Overvoltage (not withing setpoint setting)
2 Undervoltage Indication of Undervoltage (not withing setpoint setting)
3 Underfrequency Indication of Underfrequency (not withing setpoint setting)
4 Overfrequency Indication of Overvoltage (not withing setpoint setting)
5 Voltage Unbalance Indication of Voltage Unbalance
6 Phase Loss Indication of Phase Loss
7 Phase Reversal Indication of Phase Reversal
8 Plant Exerciser Indication of switch currently in the Exerciser mode
9 Monitor Mode Automatic control is disabled but still monitors source status
10 Go To Emergency The switch is commanded to go to the Emergency position
11 Emergency Inhibit The switch is commanded to go to Emergency Inhibit or Load Shed
12 Go To Neutral The switch is commanded to go to Trip or to the Neutral position
13 In Automatic Bypass The switch is in Bypass
14 Secondary Inactive Controller is configured as a Secondary and the Secondary In signal is inactive
15 Safety Interlock - Transfer Inhibited Bypass Door Open, Contactor(s) Not Locked in, in Monitor Mode.
16 Closed Transition Disabled The switch is commanded to perform only open transitions.
Timer Countdown Bar
1 Time Delay Engine Start Countdown timer before generator contacts are closed
2 Time Delay Normal Disconnect Countdown timer for when Source 1 is not available to switch to neutral.
3 Time Delay Normal to Emergency Countdown timer before normal is opened for transfer to emergency source
4 Time Delay Normal Reconnect Countdown timer for when Source 1 is available to switch back to source 1.
5 Time Delay Emergency Disconnect Countdown timer for when Source 2 is not available to switch to neutral.
6 Time Delay Emergency to Normal Countdown timer before emergency is opened for transfer to normal source
7 Time Delay Emergency Reconnect Countdown timer for when Source 2 is available to switch back to source 2.
8 Time Delay Engine Fail Countdown timer before engine source is declared unavailable.
9 Time Delay Neutral Countdown timer with both sources disconnected from the load (Trip)
10 Sync Timer Countown timer while waiting for sources to synchronize for a transition
11 Pretransfer Timer A notice prior to the transferring of the load
12 Posttransfer Timer A notice after the transferring of the load
13 S1 Unbalance Timer Timer to indicate S1 Unbalanced (not withing setpoint setting)
14 S2 Unbalance Timer Timer to indicate S2 Unbalanced (not withing setpoint setting)
15 Waiting for S1 Generator Waiting on S1 Generator to become available (voltage and Frequency)
16 Waiting for S2 Generator Waiting on S2 Generator to become available (voltage and Frequency)
17 Engine Run Timer Countdown timer of the engine test
18 Time Delay Engine Cooldown Countdown cool off timing before generator contacts are opened
19 Waiting for Manual Re-Transfer Waiting on an input contact closure to complete the manual re-transfer
20 Load Sequence Timer(s) Not on the yellow bar but underneath but still on the timer countdown screen. Named dependent on I/Os and I/O Modules used.