GE L90 Instruction Manual page 393

5 SETTINGS
SETTING
BREAKER 1 ARCING
AND
AMP FUNCTION:
Disabled=0
Enabled=1
SETTING OR
BREAKER 1 ARCING
AMP BLOCK:
Off=0
AND
SETTINGS
BREAKER 1 ARCING
AMP INIT-A:
Off=0
BREAKER 1 ARCING
AMP INIT-B:
Off=0
OR
BREAKER 1 ARCING
AMP INIT-C:
Off=0
SETTING
BREAKER 1 ARCING
AMP SOURCE:
IA
IB
IC
COMMAND
CLEAR BREAKER 1
ARCING AMPS:
NO=0
YES=1
Figure 5–133: BREAKER ARCING CURRENT SCHEME LOGIC
GE Multilin
Breaker
Contacts
Initiate
Part
Programmable
Start Delay
Start
Integration
Figure 5–132: ARCING CURRENT MEASUREMENT
SETTING
BREAKER 1 ARCING
AMP DELAY: 100 ms
0 0
AND RUN
Integrate
AND RUN
Integrate
AND RUN
Integrate
L90 Line Current Differential System
Arc
Extinguished
Total Area =
Breaker
Arcing
Current
(kA·cycle)
100 ms
Stop
Integration
Add to
Accumulator
IA -Cycle 2
Select
IB -Cycle 2
Highest
Value
IC -Cycle 2
ACTUAL VALUE
Set All To Zero
BKR 1 ARCING AMP A
BKR 1 ARCING AMP B
BKR 1 ARCING AMP C
BKR 1 OPERATING TIME A
BKR 1 OPERATING TIME B
BKR 1 OPERATING TIME C
BKR 1 OPERATING TIME
5.7 CONTROL ELEMENTS
SETTING
BREAKER 1 ARCING
AMP LIMIT:
FLEXLOGIC OPERANDS
2
KA Cycle Limit BKR1 ARC OP
*
BKR1 ARC DPO
Φ
Φ
Φ
827071A3.CDR
Φ
Φ
Φ
5-247
5