1-22 ALPS Advanced Line Protection System
GE Power Management
1.7 SELF-TEST FEATURES 1 PRODUCT DESCRIPTION
1
1.7.3 CONTINUOUS MONITOR
The ALPS relay includes a Continuous Monitor feature in addition to its self test features. The Continuous Monitor is
intended to detect any ALPS tripping units (Zone 2 or Zone 3 distance functions, 50G or 50 overcurrent functions) that are
in the picked up condition without a corresponding operation of the Fault Detector. If such a condition occurs and persists
for 1 second, the ALPS relay will issue a Non-Critical Alarm and log a Continuous Monitor event.
These Continuous Monitor Alarm points are found in Table 2–10: INDEX NUMBERS – SCHEME, RECLOSER, & PRO-
GRAMMABLE LOGIC on page 2–52
.
The Index numbers used for the Continuous Monitor are as follows:
• 48: Trip Circuit alarm
• 49: ZONE flags on alarm
• 50: Overcurrent Alarm
• 51: Unbalanced Current Detector alarm.
They are assigned in the default settings as inputs to the non-critical alarm. These flags may also be used in configurable
logic, or assigned to other alarm contacts if required.
To Next Page
Loading...
