GE D60 - Page 32

2-2 D60 Line Distance Protection System GE Multilin
2.1 INTRODUCTION 2 PRODUCT DESCRIPTION
2
Figure 2–1: SINGLE LINE DIAGRAM
Table 2–1: DEVICE NUMBERS AND FUNCTIONS
DEVICE
NUMBER
FUNCTION DEVICE
NUMBER
FUNCTION
21G Ground distance 51P Phase time overcurrent
21P Phase distance 51_2 Negative-sequence time overcurrent
25 Synchrocheck 52 AC circuit breaker
27P Phase undervoltage 59C Compensated overvoltage
27X Auxiliary undervoltage 59N Neutral overvoltage
32N Wattmetric zero-sequence directional 59P Phase overvoltage
50BF Breaker failure 59X Auxiliary overvoltage
50DD Current disturbance detector 59_2 Negative-sequence overvoltage
50G Ground instantaneous overcurrent 67N Neutral directional overcurrent
50N Neutral instantaneous overcurrent 67P Phase directional overcurrent
50P Phase instantaneous overcurrent 67_2 Negative-sequence directional overcurrent
50_2 Negative-sequence instantaneous overcurrent 68 Power swing blocking
51G Ground time overcurrent 78 Out-of-step tripping
51N Neutral time overcurrent 79 Automatic recloser
837709AG.CDR
50N
(2)
51N
(2)
67N/G
(2)
21G
(4)
59P
27P
(2)
59N
52 52
79
50P
(2)
50_2
(2)
51P
(2)
51_2
(2)
50BF
(2)
21P
(4)
67P
(2)
67_2
(2)
68
59X
78
27X
50G
(2)
51G
(2)
50DD
Monitoring
D60 Line Distance Protection System
Close
Trip
Data from/to remote end
(via communications)
Pilot
schemes
25
(2)
TM
FlexElement
Transducer
inputs
Metering
32N
(2)
59C