GE L60 Instruction Manual page 269

Line phase comparison system, ur series
Hide thumbs Also See for L60:
Table of Contents

Advertisement

5 SETTINGS
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.
SETTING
OPEN BREAKER KEYING:
Enabled=1
Disabled=0
SETTING
BRK 1
AUX CONTACT :
Off=0
SETTING
BRK 1 CONTACT SUPV:
Off=0
SETTING
BRK 2
AUX CONTACT:
Off=0
SETTING
BRK 2 CONTACT SUPV:
Off=0
SETTING
WEAK-INFEED
KEYING:
Off=0
SETTING
WEAK - INFEED
SUPV:
Off=0
GE Multilin
SETTING
OPEN BRK KEYING PKP
DELAY: 00.000S
OPEN BRK KEYING RST
DELAY: 00.000S
t
PKP
AND
AND
AND
AND
SETTING
WEEK-INFEED
PICKUP DELAY:
WEEK-INFEED
RESET DELAY:
t
PKP
AND
Figure 5–53: OPEN BREAKER ECHO SCHEME LOGIC
L60 Line Phase Comparison System
5.5 GROUPED ELEMENTS
t
RST
FLEXLOGIC OPERAND
87PC BKR ECHO PKP
OR
t
RST =35ms
827075A9.CDR
5
5-131

Advertisement

Table of Contents
loading

Table of Contents