GE L90 Instruction Manual page 360

9.3 CHANNEL ASYMMETRY COMPENSATION USING GPS
17
87L DIFF 1 MAX ASYM
18
19
87L DIFF GPS FAIL
20
21
22
87L DIFF 1 MAX ASYM
23
87L DIFF GPS FAIL
24
25
26
27
= GPS ON-GR.2 (VO2)
2. Set the 87L element with different differential settings for Settings Groups 1 and 2 as shown below
3. Enable GPS compensation when the GPS signal is valid and switch to Settings Group 2 (with more sensitive settings)
as shown below.
9
9-10
NOT
NOT
AND(2)
OR(2)
OR(2)
TIMER 3
LATCH
L90 Line Differential Relay
AND(2)
Set
LATCH
Reset
9 APPLICATION OF SETTINGS
= GPS ON-GR.2 (VO2)
831778A1.CDR
GE Multilin