Rockwell Automation Publication 193-UM015E-EN-P - October 2015 357
Protective Trip and Warning Functions Chapter 6
When the L2 Over Current Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 13-short blink pattern
• Bit 12 in Current Warning Status (Parameter 10) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm closes
L3 Over Current Warning Level
L3 Over Current Warning Level (Parameter 284) allows you to define the current
at which the E300 relay indicates a L3 Over Current warning. It is user-adjustable
from 10…100% for the FLA Setting (Parameter 171).
Table 281 - L3 Over Current Warning Level (Parameter 284)
Line Loss Protection
For non-motor applications when the measured current is 0 amps a specific
phase, this may indicate an electrical malfunction such as bad resistive heater
element or non-operating incandescent light bulb. Such conditions may not
harm the power system, but it can lead to loss of production or certification
noncompliance.
The E300 relay can monitor for a current-based line loss per phase with its Line
Loss Trip and Warning function to detect for a rapid line loss in a specific phase
to minimize damage and loss of production.
Line Loss Inhibit Time
Line Loss Inhibit Time (Parameter 285) allows you to inhibit an L1, L2, and L3
Line Loss trip and warning from occurring during a load starting sequence. It is
adjustable from 0…250 seconds.
Table 282 - Line Loss Inhibit Time (Parameter 285)
Default Value 90
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
The L3 Over Current Warning function does not include a time delay feature.
Once the Over Current Inhibit Timer has expired, the L3 Over Current Warning
indication is instantaneous.
Default Value 10
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