4–188
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
PROTECTION
CHAPTER 4: SETPOINTS
Figure 4-67: Phase Instantaneous Overcurrent logic diagram
894034A2.cdr
SETPOINTS
Phase
A
current
(I
a
)
RUN
SETPOINTS
FUNCTION
:
Disabled
=
0
T
rip
PICKUP
:
DROPOUT
DELA
Y:
AND
Phase B current
(I
b
)
Phase C current
(I
c
)
RUN
RUN
Operate Output Relay 1 (TRIP
)
LED
: PICKUP
Alarm
OR
OR
From Cold Load Pickup
From
Autoreclose
(p
er shot settings
)
Phase Currents
AND
Latched
Alarm
AND
SETPOINTS
BLOCK
Of
f =
0
OR
Ib
>
PICKUP
Ia
>
PICKUP
Ic
>
PICKUP
SETPOINTS
t
PKP
t
PKP
t
PKP
OR
OR
LED
:
ALARM
RESET
Command
AND
S
R
LA
TCH
Configurable
Phase IOC
1
O
P
Phase IOC
1
O
P
A
Phase IOC
1
O
P
B
Phase IOC
1
OP
C
FlexLogic Operands
Phase IOC
1
P
KP
Phase IOC
1
PKP
A
Phase IOC
1
PKP
B
Phase IOC
1
P
KP
C
FlexLogic Operands
SETPOINTS
OUTPUT
RELA
Y
S
Do Not Operate
,
Operate
t
RST
t
RST
t
RST
PICKUP
DELA
Y
:
LED
:
TRIP
Set
Dominant
Ph
A
Reverse
(from Phase
Directional OC element
)
From Manual Close
Blocking
SETPOINTS
INPUT
:
Phasor
,
RMS
SETPOINTS
DIRECTION
:
Disabled
Forward
Reverse
OR
AND
AND
Ph B Reverse
(from Phase
Directional OC element
)
Ph C Reverse
(from Phase
Directional OC element
)
AND
AND
Same Logic as for Phase
A
Same Logic as for Phase
A
CONFIGURABLE IN
845
SETPOINTS
SIGNAL
INPUT
:
CT Bank
1
-
J1
USED ONL
Y
IN
845
/889
USED ONL
Y
IN
850
Summary of Contents for 869
Page 10: ...VIII 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL ...
Page 127: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL 3 49 ...
Page 129: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL 3 51 ...
Page 538: ...4 406 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 4 SETPOINTS ...
Page 578: ...6 22 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL FLEXELEMENTS CHAPTER 6 METERING ...
Page 592: ...7 14 869 MOTOR PROTECTION SYSTEM INSTRUCTION MANUAL CLEAR RECORDS CHAPTER 7 RECORDS ...