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CHAPTER 1: INTRODUCTION
BUS
52
TRIP
MONITORING
3
50P
2
AF
SENSORS
1
50G/SG
2
LOAD
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
Figure 1-1: Functional block diagram
79
CLOSE
50N
51P
51N
50_2
2
1
1
50P HS
1
50G/
51G/SG 67G/SG
50G/SG
51G
HS
1
1
1
Table 1-1: ANSI device numbers and functions
ANSI Code
24
25
27_1
27P
27X
32
32N
I1/I2 (46BC)
49
50_2
50BF
50G/SG
50N
50P
51_2
51G/SG
51N
51P
59_2
DESCRIPTION OF THE 350 FEEDER PROTECTION SYSTEM
24
27P
1
51_2
49
67N
67P
1
1
1
32
32N
350 RELAY Y
2
VTFF
27_1
61850 Logical Node
Description
PVPH
Volts per Hertz
RSYN1
Synchrocheck
psseqPTUV1
Positive Sequence Undervoltage
phsPTUV1, phsPTUV2,
Phase Undervoltage
phsPTUV3, phsPTUV4
auxPTUV1
Auxiliary Undervoltage
PDOP1, PDOP2
Directional Power
ndPDOP
Wattmetric Ground Fault
-
Broken Conductor
PTTR1
Thermal Overload
ngseqPIOC1
Negative Sequence Overcurrent
RBRF1
Breaker Failure
gndPIOC1, gndPIOC2/
Ground/Sensitive Ground Instantaneous Overcurrent
hsePIOC1, hsePIOC2
ndPIOC1, ndPIOC2
Neutral Instantaneous Overcurrent
phsPIOC1, phsPIOC2
Phase Instantaneous Overcurrent
ngseqPTOC1
Negative Sequence Time Overcurrent
gndPTOC1/hsePTOC1 Ground/Sensitive Ground Time Overcurrent
ndPTOC1
Neutral Time Overcurrent
phsPTOC1
Phase Time Overcurrent
ngseqPTOV1,
Negative Sequence Overvoltage
ngseqPTOV2
BUS VT
59P
59_2
59N
1
1
1
1
I /I
1
2
METERING
TRANSIENT RECORDER
EVENT RECORDER
FAULT REPORT
A
CLP
CTS
86
50BF
27X
59X
1
1
1
81U
81O
2
2
25
1
898742A7.CDR
1–3
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