I.L. 40-201.9
Power Automation and Protection Division
L-4
REL 352 Version 1.00
Figure L-2: Sheet 2 of 3
IAL
IBL
ICL
IGL
52b
SBP
Target Reset
52b
Stub
Bus
Protection
Target
Reset
Hardw
are Inputs
Primary
Input
Power
Backup
Input
Power
P
N
P
N
Power
Supply
1
Power
Supply
2
PSE
IAL
IAH
IACD
VACD
PHASE A
FDOP A
NONDIRECTIONAL
DIRECTIONAL
FDOP
OUT
IN
OUT
IN
IPH
IBL
IBH
IBCD
VBCD
PHASE B
FDOP B
FDOP
OUT
IN
OUT
IN
IPH
ICL
ICH
ICCD
VCCD
PHASE C
FDOP C
FDOP
OUT
IN
OUT
IN
IPH
IGL
IGH
IGCD
GR
OUND
FDOG
OUT
IN
OUT
IN
IGH
IH
HIGH SET
OVERCURRENT
TRIP
CHANGE DETECTOR
IACD
IBCD
ICCD
IGCD
VACD
VBCD
VCCD
IL
LOW LEVEL
SUPERVISION
CDT
0
150
DV DI
CD
DI
Opto
Isolator
Opto
Isolator
Opto
Isolator
FDOG
IAHT
IBHT
ICHT
IGHT
CD
(2)