Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 111)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 111
Protective Trip and Warning Functions Chapter 5
When the L1 Under Current Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 8-short blink pattern
• Bit 7 in Current Warning Status (Parameter 10) will set to 1
• Bit 1 in Device Status 0 (Parameter 20) will set to 1
• Any relay outputs configured as a Warning Alarm will close
L1 Under Current Warning Level
L1 Under Current Warning Level (Parameter 268) allows the user to define the
current at which the E300 Electronic Overload Relay will indicate a L1 Under
Current warning. It is user-adjustable from 10…100% for the FLA Setting
(Parameter 171).
Table 96 - L1 Under Current Warning Level (Parameter 268)
L2 Under Current Trip
The E300 Electronic Overload Relay will trip with a L2 Under Current
indication if:
• No trip currently exists
• L2 Under Current Trip is enabled
• Current is present
• Under Current Inhibit Timer has expired
• L2 Percent FLA (Parameter 48) is less than the L2 Under Current Trip
Level for a time period greater than the L2 Under Current Trip Delay.
If the E300 Electronic Overload Relay trips on a L2 Under Current, the:
• TRIP/WARN LED status indicator will flash a red 9-short blink pattern
• Bit 8 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
Default Value 40
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
IMPORTANT The L1 Under Current Warning function does not include a time delay feature.
Once the Under Current Inhibit Timer has expired, the L1 Under Current
Warning indication is instantaneous.