352 Rockwell Automation Publication 193-UM015E-EN-P - October 2015
Chapter 6 Protective Trip and Warning Functions
L1 Over Current Warning Level
L1 Over Current Warning Level (Parameter 278) allows you to define the current
at which the E300 relay indicates a L1 Over Current warning. It is user-adjustable
from 10…100% for the FLA Setting (Parameter 171).
Table 275 - L1 Over Current Warning Level (Parameter 278)
L2 Over Current Trip
The E300 relay trips with a L2 Over Current indication if:
• No trip currently exists
• 2 Over Current Trip is enabled
• Current is present
• Over Current Inhibit Timer has expired
• 2 Perc
ent FLA (Parameter 48) is greater than the L2 Over Current Trip
Level
for a time period greater than the L2 Over Current Trip Delay.
If the E300 relay trips on a L2 Over Current, the:
• TRIP/WARN LED status indicator flashes a red 12-short blink pattern
• Bit 11 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
P
rote
ction Fault state (if so programmed)
Default Value 90
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
The L1 Over Current Warning function does not include a time delay feature.
Once the Over Current Inhibit Timer has expired, the L1 Over Current Warning
indication is instantaneous.
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