1. The document describes the scheme logic for a power generation control system. It includes input/output points, their purposes, and the logic functions that supervise them. 2. The logic is broken down into six sections - customer inputs/outputs, scheme logic, trip #3 logic, trip #1 logic, trip #2 logic, and seal-in logic. Trip and protection functions are described for different input conditions. 3. Key components include inputs for generator status, protective relays, and control functions. Outputs control circuit breakers, alarms, initiations, and seal-in protective trip outputs for a set time period.

1. Scheme LogicScheme Logic

2. I/O Point Purpose
IN1 Gen CB Status IPSLogic Functions IPS LOGIC Input(s) TDDO
IN2 86U Status 5A Trip Sequence & Governor in manaul IPS#1 Out4/Out5/Out15/Out21+ IN4
IN3 Sync Condense Status 86G Trip Sequence Initiate IPS#2 IN11
IN4 Governor in Manual 86GH Trip Sequence Initiate IPS#3 IN12 SV13
IN5 Wicket Gate at SNL 86N Trip Sequence Initiate IPS#4 IN13
IN7 Exciter Low Level 86NH Trip Sequence Initiate IPS#5 IN14 SV14
IN8 Sync Condense Status Trip Gen CB + Wicket Gate IPS#6 OUT16 + IN5 OUT16 contact Seal-in time set at desire time delay
IN11 86G Trip Sequence Initiate
IN12 86GH Trip Sequence Initiate
IN13 86N Trip Sequence Initiate
IN14 86NH Trip Sequence Initiate
TRIP#1 /Arm Fire Prot. SV13T SV14T
Supervised by 60FL 60FL 60FL+27 32+IN7 27+IN4 IN3 27+IN3
21 24-2 40-1&2 40-2 59-1 59-2 87-1/2 IPS#1 IPS#2 59N-1&2 27TN-1&2 81-1 IPS#4 32-1 78 46-2 81-2 25 IPS#3 IPS#5 IPS#6
Out1 Arm Fire Prot. X, X X, X X, X
Out2 Arm Fire Prot. X, X X, X X, X
Out3 Test point
Out4 PML Alarm X X X X
Out5 UCC PLC X X X X
Out6 BF Initiate X X X X X X X X X X X X X X
Out7 BF Initiate X
Out8 Trip Gen CB X
Out9 Trip Field CB X
Out10 Close PIV X
Out11 Trip 86U X X X X X X X X X X X X X X X
Out12 Trip Gen CB X X X X X X X X X X X X X X
Out14 Trip Field CB X X X X X X X X X
Out15 De Excite X X X X
Out16 IPSLogic#6 X X X X X
Out17
Out10 X
Out18
Out19
Out20 Block TIV X X
Out21 PAM PLC X X X X
Out22 Sync Check X
BC Hydro application requires Seal-in of the ARM Fire Protection and Block TIV trip outputs.
Out1,Out2 and Out20 have output contact seal-in setting time of 1 - 8160 cycles.
TRIP#3TRIP#2 / Arm Fire Prot.
Seal-In Logic
ARM Fire Protection Block TIV
Out2
Seal-in
1 - 8160
cycles
Out1
Seal-in
1 - 8160
cycles
Out20
Seal-in
1 - 8160
cycles
Contacts Latch
or use TDDO
86U
IN4
Out4
Out5
Out15
Out21
OR
AND Output(s)
IPSLogic#1
IN11 Output(s)
IPSLogic#2
IN13 Output(s)
IPSLogic#4
IN14 Output(s)
IPSLogic#5
TDDO
IN12 Output(s)
IPSLogic#3
TDDO IN15
Out16
IPSLogic#6
AND Output(s)
Seal-in
M-3425A Trip Matrix Logic
Scheme Logic

3. IN204
IN203
IN202
IN201
IN207
IN205
IN104
IN103
IN101
IN102
Customer
Input
BECO
Sync Condense StatusIN8
86NH Trip Sequence InitiateIN14
86N Trip Sequence InitiateIN13
86GH Trip Sequence InitiateIN12
86G Trip Sequence InitiateIN11
Exciter Low LevelIN7
Wicket Gate at SNLIN5
Governor in ManualIN4
Sync Condense StatusIN3
86U StatusIN2
Gen CB StatusIN1
Description/PurposeInput
Customer Scheme Inputs
Scheme Logic

4. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Purpose
Arm Fire Prot.
Output
Out1
Customer BECO
Out212
Out211
Out210
Out207
Out205
Out204
Out202
Out201
Out106
Out105
Out104
Out103
Out102
Output
Out101
Customer Scheme Outputs
Scheme Logic

5. XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
81-246-27832-1
27+IN8IN3
TRIP#3
Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
Customer Scheme Trip #3
Scheme Logic

6. XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
81-246-27832-1
27+IN8IN3
TRIP#3
Customer Logic
BECO Logic
Customer Scheme Trip #3
OOST
4602T
IN103
32PIT
IN103
27B81P
81D2T
AND
OR
AND
AND
TRIP3
78
46-2
IN3
32-1
IN8
27
81-2
AND
OR
AND
AND
TRIP3
Scheme Logic

7. XXXX
XXXX
XXXX
XXXX
XXXX
XXXX
81-246-27832-1
27+IN8IN3
TRIP#3
BECO Logic
IN11 IN3 IN8
Sync Condenser Status
IN3 active
contact closed
IN8 active
contact open
Input Contact Activation State
Customer Scheme Trip #3
78
46-2
IN3
32-1
IN8
27
81-2
AND
OR
AND
AND
TRIP3
Scheme Logic

8. BECO Input Contact Logic
Customer Scheme Trip #3
IN3 active
when closed
IN8 active
when open
Scheme Logic

9. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
X
X
32-1
IN3
BECO Logic
IN3
Customer Scheme Trip #3 (32-1)
IN3
32-1
AND
OR
TRIP3
Scheme Logic

10. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
X
X
81-2
27+IN3
81 function internal cutoff voltage is 5-15V
BECO Logic
IN8
Customer Scheme Trip #3 (81-2)
IN8
27-1
81-2
OR
AND
AND
TRIP3
Scheme Logic

11. 81 function internal cutoff voltage is 5-15V
Customer Scheme Trip #3 (81-2)
81 Function Cutoff Voltage
0
5
10
15
20
0 10 20 30 40 50 60 70
Frequency
CutoffVoltage
Scheme Logic

12. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
XXXXXXXXXTrip Field CBOut14
XXXXXXXXXTrip Gen CBOut12
XXXXXXXXXTrip 86UOut11
XXXXXXXXXBF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
X, XArm Fire Prot.Out2
X, XArm Fire Prot.Out1
IPS#2IPS#187-1/259-259-140-240-1&224-221
60FL+2760FL60FLSupervised by
TRIP#1/Arm Fire Prot
Customer Scheme Trip #1
Scheme Logic

13. 60LOP
40Z1T
AND AND
TRIP1
Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
40-1
60FL
40-160FL
Customer Scheme Trip #1 (40-1)
Scheme Logic

14. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
40-2
60FL+27
40-2
Voltage
Control
Output
Customer Scheme Trip #1 (40-2)
TRIP1
OR
27
60LFL
40-2
AND
60LFL
40-2 AND
T1
T2
Scheme Logic

15. IN11 OR
TRIP1
Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
IPS#2IPSLogic#2
IN11 Output(s)
IPSLogic#2
Customer Logic
Customer Scheme Trip #1 (IPS#2)
Scheme Logic

16. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
IN12
SV13T
TDDO
86U
IN12 Output(s)
IPSLogic#3
TDDO
Customer Logic
X
X
X
X
X
X
IPS#3
SV13T
IPSLogic#3
Dropout Time Delay
Customer Scheme SV13T (IPS#3)
Scheme Logic

17. IN14
SV14T
TDDO
86U
Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
IN14 Output(s)
IPSLogic#5
TDDO
Customer Logic
X
X
X
X
IPS#5
SV14T
IPSLogic#5
Dropout Time Delay
OR
Customer Scheme SV14T (IPS#5)
Scheme Logic

18. IN4
TRIP1
AND
Trip#3
Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
IPS#1
IPSLogic#1 Initiating Outputs
IN4
Out4
Out5
Out15
Out21
OR
AND Output(s)
IPSLogic#1
Customer Logic
Initiating Inputs
AND
Customer Scheme Trip #1 (IPS#1)
Scheme Logic

19. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
XXXX
XXXX
X, XX, X
X, XX, X
IPS#481-127TN-1&259N-1/2
27+IN432+IN7
TRIP#2 / Arm Fire Prot.
Customer Scheme Trip #2
Scheme Logic

20. Customer Logic
BECO Logic
XXXX
XXXX
X, XX, X
X, XX, X
IPS#481-127TN-1&259N-1/2
27+IN432+IN7
TRIP#2 / Arm Fire Prot.
Customer Scheme Trip #2
IN207
32P2T AND OR
TRIP2
64G1T
64G2T
IN203
IN104
27B81P
81D1T
AND
AND
IN7
32P2T AND OR
TRIP2
59N1
27TN
IN13
IN4
27
81-1 AND
IPSlogic#4
Scheme Logic

21. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
X
X
X
X
27TN-1&2
32+IN7
BECO Logic
32 Supervision
Customer Scheme Trip #2 (27TN)
IN7
32-2 AND OR
TRIP2
27TN
Scheme Logic

22. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
87U2
59N2
AND
AND
IN2
OR
Arm Fire
Protection
32
IN7
AND
27TN2
IN2
Latching Outputs
or time delayed dropout
1 to 8160 cycles
Customer Logic
BECO Logic
Seal-in Circuit
XX
XX
X, XX, X
X, XX, X
27TN-1&259N-1&2
32+IN7
Customer Scheme Trip #2 (Arm Fire)
87U
32P2T
IN207
AND
OR
64G2
64G1
IN101
87R
AND
Arm Fire
Protection
Scheme Logic

23. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised by
Customer Logic
BECO Logic
IPS#3
OR
IPS#5
Block TIV
Out20 86U
Seal-in Circuit
Latching Output
or time delayed dropou
1 to 8160 cycles
XX
XX
X
X
X
XX
X
IPS#5IPS#3
SV14TSV13T
Customer Scheme Block TIV
SV13T
OR
IN101
SV14T
AND
Block TIV
Scheme Logic

24. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised byCustomer Logic
BECO Logic
Customer Scheme Trip 86U
Trip1
86U
IN204
IN203
Trip2
IN202
IN201
OR
Trip1
86U
IPS#5
IPS#4
Trip2
IPS#3
IPS#2
OR
IPS#1
Scheme Logic

25. Sync CheckOut22
PAM PLCOut21
Block TIVOut20
Close PIVOut17
IPSLogic#6Out16
De ExciteOut15
Trip Field CBOut14
Trip Gen CBOut12
Trip 86UOut11
BF InitiateOut6
UCC PLCOut5
PML AlarmOut4
Test pointOut3
Arm Fire Prot.Out2
Arm Fire Prot.Out1
Supervised byCustomer Logic
BECO Logic
Trip1
86U
IPS#5
IPS#4
Trip2
IPS#3
IPS#2
OR
IPS#1
Customer Scheme Trip 86U
Trip1
86U
IN204
IN203
Trip2
IN202
IN201
OR
Scheme Logic

26. Customer Logic
BECO Logic
IN205
Trip2
SV14T OR
AND
SV7DO
AND
OR
Trip3
SV13T
Trip1
Trip Gen
Breaker
BFI
OR
SV13T
Trip1
Trip Gen
Breaker
BFI
IN5
AND
Trip3
Trip2
IPS#5 OR
OUT16 TDDO
1 - 8160 ~
IPSLogic#6
Customer Scheme Trip Gen Breaker
Scheme Logic

27. Sync Check
PAM PLC
Block TIV
Close PIV
IPSLogic#6
De Excite
Trip Field CB
Trip Gen CB
Trip 86U
BF Initiate
UCC PLC
PML Alarm
Test point
Arm Fire Prot.
Arm Fire Prot.
Supervised by
X
X
IPS#6
Seal in time
Customer Scheme IPSLogic #6
IN5
AND
OUT16 TDDO
1 - 8160 ~
Outputs
IPSLogic#6
Scheme Logic

28. THE ENDTHE END
Scheme Logic
©2008 Beckwith Electric Co., Inc.