Rockwell-automation 592- E300 Overload Relay User Manual Manual de usuario Pagina 114

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114 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Table 99 - L2 Under Current Warning Level (Parameter 271)
L3 Under Current Trip
The E300 Electronic Overload Relay will trip with a L3 Under Current
indication if:
No trip currently exists
L3 Under Current Trip is enabled
Current is present
Under Current Inhibit Timer has expired
Percent FLA (Parameter 49) is less than the L3 Under Current Trip Level
fo
r a time period greater than the L3 Under Current Trip Delay.
If the E300 Electronic Overload Relay trips on a L3 Under Current, the:
TRIP/WARN LED status indicator will flash a red 10-short blink pattern
Bit 9 in Current Trip Status (Parameter 4) will set to 1
Bit 0 in Device Status 0 (Parameter 20) will set to 1
Any relay outputs configured as a Trip Relay will open
Any relay outputs configured as a Control Relay will open
Any relay outputs configured as a Trip Alarm will close
Any relay outputs configured as a Normal Relay will be placed in their
P
r
otection Fault state (if so programmed)
Default Value 40
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
IMPORTANT
The L2 Under Current Warning function does not include a time delay feature.
Once the Under Current Inhibit Timer has expired, the L2 Under Current
Warning indication is instantaneous.
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