Rockwell Automation Publication 193-UM015D-EN-P - February 2015 163
Protective Trip and Warning Functions Chapter 6
Current warning. It is user-adjustable from 10…100% for the FLA Setting
(Parameter 171).
Table 200 - L1 Under Current Warning Level (Parameter 268)
L2 Under Current Trip
The E300 Electronic Overload Relay trips 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 flashes a red 9-short blink pattern
• Bit 8 in Current Trip Status (Parameter 4) sets to 1
• Bit 0 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Trip Relay open
• Any relay outputs configured as a Control Relay open
• Any relay outputs configured as a Trip Alarm close
• Any relay outputs configured as a Normal Relay are placed in their
Protection 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
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.
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