Targets Menu; Target Messages; Relay Self-Tests - GE L90 Instruction Manual
L90 line current differential system ur series
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- Instruction manual (900 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (832 pages)
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7.2 TARGETS
7.2TARGETS
The status of any active targets will be displayed in the targets menu. If no targets are active, the display will read
:
ACTIVE TARGETS
When there are no active targets, the first target to become active will cause the display to immediately default to that mes-
sage. If there are active targets and the user is navigating through other messages, and when the default message timer
times out (i.e. the keypad has not been used for a determined period of time), the display will again default back to the tar-
get message.
The range of variables for the target messages is described below. Phase information will be included if applicable. If a tar-
get message status changes, the status with the highest priority will be displayed.
Table 7–1: TARGET MESSAGE PRIORITY STATUS
PRIORITY
ACTIVE STATUS
1
OP
2
PKP
3
LATCHED
If a self test error is detected, a message appears indicating the cause of the error. For example
indicates that the minimal relay settings have not been programmed.
7
a) DESCRIPTION
The relay performs a number of self-test diagnostic checks to ensure device integrity. The two types of self-tests (major and
minor) are listed in the tables below. When either type of self-test error occurs, the Trouble LED Indicator will turn on and a
target message displayed. All errors record an event in the event recorder. Latched errors can be cleared by pressing the
RESET key, providing the condition is no longer present.
Major self-test errors also result in the following:
•
The critical fail relay on the power supply module is de-energized.
•
All other output relays are de-energized and are prevented from further operation.
•
The faceplate In Service LED indicator is turned off.
•
A
RELAY OUT OF SERVICE
7-6
TARGETS
DIGITAL ELEMENT
MESSAGE
LATCHED
DIGITAL ELEMENT 48:
MESSAGE
LATCHED
MESSAGE
DESCRIPTION
element operated and still picked up
element picked up and timed out
element had operated but has dropped out
event is recorded.
L90 Line Current Differential System
Displayed only if targets for this element are active.
1:
Example shown.
Displayed only if targets for this element are active.
Example shown.
↓
↓
7 COMMANDS AND TARGETS
7.2.1 TARGETS MENU
7.2.2 TARGET MESSAGES
UNIT NOT PROGRAMMED
7.2.3 RELAY SELF-TESTS
GE Multilin
NO
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