GE 339

CHAPTER 6: SETPOINTS S3 PROTECTION
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 6–99
Figure 6-42: RTD Protection logic diagram
896828A5.cdr
OR
SETTINGS
SETTING RTD #1 Alarm Enabled = 1 SETTINGS BLOCK 1 Off = 0 BLOCK 2 BLOCK 3 Off = 0 Off = 0
AND
RUN
SETTING
S3 RTD PROTECTION RTD #1 Trip Voting
OR
LATCH
S R
LOGIC OPERAND
RTD #1 Alarm OP Any Alarm OP
TARGET MESSAGE
RTD #1 Alarm State: Operate
ASSIGNABLE AUX RELAYS
Operate output relays upon selection
RTD #1 Trip OP Any Trip OP
S3 RTD PROTECTION
RTD #1 Trip Enabled = 1
S3 RTD PROTECTION RTD #1 Alarm Temp RTD #1 Trip Temp
T > 250 C
o
T > Alarm Temp
T > Trip Temp
RUN
T
SETTING S3 RTD PROTECTION RTD #1 Trip Temp
T > 250 C
o
T > Trip Temp
T
AND
OR
RTD #1 Trip State: Trip
INPUTS
OR
KEYPAD RESET
Logic is shown for RTD #1; other RTDs are similar.
RTD #1 RTD #2 RTD #3 RTD #10 RTD #11 RTD #12
#1 #2 #3 #10 #11 #12
OFF
Setting = Off
Setting = RTD #1
S3 RTD PROTECTION
Disabled = 0 Disabled = 0
AND
ANDAND
Alarm Pickup Delay
SETPOINTS
Alarm Dropout Delay
t
PKP
t
RST
Trip Pickup Delay Trip Dropout Delay
t
PKP
t
RST
SETPOINTS
Emergency Restart Input
Lockout Reset Input
Remote Reset Input
SETTINGS
Emergency Restart Off = 0 Lockout Reset Off = 0 Remote Reset Off = 0 S4 CONTROLS
AND
AND
AND
RTD #1 Alarm PKP RTD #1 Trip PKP
RTD #1 Alarm State: Pickup RTD #1 Trip
State: Pickup