GE L90 Instruction Manual page 401

5 SETTINGS
The continuous monitor logic is intended to detect the operation of any tripping element that has operated under normal
load conditions; that is, when the disturbance detector has not operated. Because all tripping is supervised by the distur-
bance detector function, no trip will be issued under these conditions. This could occur when an element is incorrectly set
so that it may misoperate under load. The continuous monitor can detect this state and issue an alarm and/or block the trip-
ping of the relay.
SETTING
CONT MONITOR
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
CONT MONITOR
I_SUPV:
Off = 0
SETTING
CONT MONITOR
I_OP:
Off = 0
SETTING
CONT MONITOR
V_SUPV:
Off = 0
SETTING
CONT MONITOR
V_OP:
Off = 0
GE Multilin
AND
AND
AND
AND
Figure 5–148: CONTINUOUS MONITOR SCHEME LOGIC
L90 Line Current Differential System
CONSTANT
CONT
MONITOR
TIMER
OR
t = 1 sec
pkp
t = 0
RST
FLEXLOGIC OPERANDS
CONT MONITOR OP
CONT MONITOR PKP
CONT MONITOR DPO
5.7 CONTROL ELEMENTS
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