GE UR series

5-124 L60 Line Phase Comparison System GE Multilin
5.5 GROUPED ELEMENTS 5 SETTINGS
5
• BRK 2 AUX CONTACT: If supervision of two breakers is required, this setting is used to assign a FlexLogic™ operand
to control open/close state of the Breaker #2 with either 52a or 52b type contact to create logic “1” when the breaker is
open.
• BRK 2 CONT SUPV: Selects a supervising element such as a test/normal switch usually used in breaker 2 control
schemes or any other elements. If no element is required, the default value “Off” should be used.
• OPEN BREAKER KEYING PKP DELAY: Delays the operation of open breaker keying to override disagreement
between main and auxiliary contacts of the breaker or any other operating conditions.
• OPEN BREAKER KEYING RST DELAY: Delays the reset of open breaker keying to override disagreement between
main and auxiliary contacts of the breaker or any other operating conditions.
• WEAK-INFEED KEYING: This setting assigns a sensitive phase-current element for weak-infeed keying control. It
should be normally picked up with a minimum line load current. An instantaneous overcurrent element or a group of
overcurrent elements are suitable for this purpose.
• WEAK-INFEED SUPV: This setting selects a weak-infeed supervising element from FlexLogic™ operands. An under-
voltage element, auxiliary contacts of breakers indicating close position, or other elements can be useful for no-current
supervision.
• WEAK-INFEED PICKUP DELAY: This setting delays operation of weak-infeed keying during some transient condi-
tions (such as breaker reclosure, etc.).
• WEAK-INFEED RESET DELAY: The weak-infeed keying function incorporates a default 35 ms reset delay to assure
reset coordination with the FDH trip-level fault detector at the remote terminal during fault clearing. The default reset
time can be changed according to local conditions.
Figure 5–53: OPEN BREAKER ECHO SCHEME LOGIC
SETTING
SETTING
SETTING
SETTING
SETTING
SETTING
SETTING
SETTING
FLEXLOGIC OPERAND
OPEN BREAKER KEYING:
BRK 1 CONTACT SUPV:
BRK 2 CONTACT SUPV:
OPEN BRK KEYING PKP
DELAY: 00.000S
WEEK-INFEED
PICKUP DELAY:
OPEN BRK KEYING RST
DELAY: 00.000S
WEEK-INFEED
RESET DELAY:
WEAK-INFEED
KEYING:
WEAK - INFEED
SUPV:
BRK 1
AUX CONTACT :
Off=0
SETTING
Off=0
Enabled=1
Off=0
Disabled=0
Off=0
Off=0
Off=0
OR
AND
AND
AND
AND
AND
827075A9.CDR
87PC BKR ECHO PKP
BRK 2
AUX CONTACT:
t
PK
P
t
R
ST
=
3
5ms
t
PK
P
t
R
ST