Cb Operating Time Accumulator; Excessive Fault Frequency Counter; Figure 124: Operating Time Accumulator; Figure 125: Excessive Fault Frequency Logic Diagram - GE P4A Technical Manual

Chapter 12 - Monitoring and Control
5.3

CB OPERATING TIME ACCUMULATOR

Trip 3 ph
External Trip3 ph
Trip Output A
External Trip A
IA < fixed threshold
Pole Dead A
Trip Output B
External Trip B
IB < fixed threshold
Pole Dead B
Trip Output C
External Trip C
IC < fixed threshold
Pole Dead C
Reset CB Data
Reset CB Data
V01274

Figure 124: Operating Time Accumulator

5.4

EXCESSIVE FAULT FREQUENCY COUNTER

Trip 3 ph
External Trip3 ph
Trip Output A
External Trip A
Trip Output B
External Trip B
Trip Output C
External Trip C
Lockout Alarm
Fault Freq Time
V01278

Figure 125: Excessive Fault Frequency logic diagram

254
1
1
1
1
1
1
1
1
1
1
1
1
1
Note : CB operating time not accumulated when device is in test mode
Start
CB operating time phase A
Stop
Start
CB operating time phase B
Stop
Start
CB operating time phase C
Stop
t
S
Q
0
1
R
P54A/B/C/E
Increment
CBOpTimePhA Counter
Reset
Increment
CBOpTimePhB Counter
Reset
Increment
CBOpTimePhB Counter
Reset
Increment
Excessive Fault Frequency Counter
Reset
P54xMED-TM-EN-1