Load Increase Alarm - GE 339 Instruction Manual

S3 PROTECTION

Load increase alarm

SETTI G
LOAD INCR ALARM
Enabled = 1
Disabled = 0
MOTOR STATUS
Running
SETTI GS
BLOCK 1
OFF = 0
BLOCK 2
OFF = 0 OR
BLOCK 3
OFF = 0
896818.cdr
6–84
The Load Increase Alarm is used to alarm abnormal load increases that may indicate
problems with the process. An alarm is enabled only after the acceleration stage is
complete and the motor has entered the running stage. Once enabled, the alarm is
generated when the motor load exceeds the setting LOAD INCR PKP for the time delay
specified by the setting LOAD INCR DELAY, and automatically resets when the current has
subsided.
PATH: SETPOINTS > S3 PROTECTION > LOAD INCR ALARM
LOAD INCR FUNC
Range: Disabled, Enabled
Default: Disabled
This setting enables the Load Increase Alarm functionality.
LOAD INCR PKP
Range: 50% to 150% FLA in steps of 1% FLA
Default: 150% FLA
This setting specifies the pickup threshold for the Load Increase Alarm.
LOAD INCR DELAY
Range: 0.00 to 60.00 s in steps of 0.01 s
Default: 1.50 s
This setting specifies the time delay for the Load Increase Alarm.
OUTPUT RELAY 4 to 6 / OUTPUT RELAY 5 to 6
Range: Do not operate, Operate
Default: Do not operate
Any assignable output relay can be selected to operate upon Load Increase Alarm
operation. When the SWITCHING DEVICE is selected as BREAKER, the assignable output
relays will be Output Relay 4 to 6. When the SWITCHING DEVICE is selected as
CONTACTOR, the assignable output relays will be Output Relay 5 to 6.
BLOCK 1 to 3
Range: Off, Contact Input 1 to 10, Virtual Input 1 to 32, Remote Input 1 to 32, Logic
Element 1 to 16
Default: Off
Three blocking inputs are provided for the Load Increase Alarm feature. When any of the
selected blocking inputs is on, the Load Increase Alarm function is blocked.
Figure 23: Load Increase logic diagram
SETTI G
LOAD INCR PKP
AND RUN
Iavg > Pickup
SETTI G
LOAD INCR DELAY
t
PKP
0
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
LOGIC OPERA D
LOAD INCR OP
ANY ALARM OP
LOAD INCR PKP
ANY ALARM PKP
TARGET MESSAGE
Load Incr Alarm
State: Operate
Load Incr Alarm
State: Pickup