GE UR series Instruction Manual page 35

2 PRODUCT DESCRIPTION
Table 2–1: ANSI DEVICE NUMBERS AND FUNCTIONS
DEVICE FUNCTION
NUMBER
21G Ground distance
21P Phase distance
25 Synchrocheck
27P Phase undervoltage
27X Auxiliary undervoltage
32N Wattmetric zero-sequence directional
50BF Breaker failure
50DD Disturbance detector
50G Ground instantaneous overcurrent
50N Neutral instantaneous overcurrent
50P Phase instantaneous overcurrent
50_2 Negative-sequence instantaneous overcurrent
51G Ground time overcurrent
51N Neutral time overcurrent
52
79
Monitoring
50DD 50P(2)
Data from/to remote end
L60
Line Phase Comparison Relay
GE Multilin
CLOSE TRIP
50_2(2) 51P(2) 51_2(2) 50BF(2) 87PC 21P
(via communications)
50G(2)
Figure 2–2: SINGLE LINE DIAGRAM
L60 Line Phase Comparison System
DEVICE FUNCTION
NUMBER
51P Phase time overcurrent
51_2 Negative-sequence time overcurrent
52 AC circuit breaker
59N Neutral overvoltage
59P Phase overvoltage
59X Auxiliary overvoltage
59_2 Negative-sequence overvoltage
67N Neutral directional overcurrent
67P Phase directional overcurrent
67_2 Negative-sequence directional overcurrent
68 Power swing blocking
78 Out-of-step tripping
79 Automatic recloser
87PC Phase comparison
67P(2) 67_2(2) 68 78
Metering
FlexElement TM
51G(2)
2.1 INTRODUCTION
50N(2) 51N(2) 67N(2) 32N(2) 21G
27P(2)
Transducer
inputs
59P
59N
59X 27X
25(2)
831707AT.CDR
2
2-3