Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 125)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 125
Protective Trip and Warning Functions Chapter 5
• L3 Percent FLA (Parameter 49) is greater than the L3 Over Current
Warning Level
When the L2 Over Current Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 13-short blink pattern
• Bit 12 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
L3 Over Current Warning Level
L3 Over Current Warning Level (Parameter 284) allows the user to define the
current at which the E300 Electronic Overload Relay will indicate a L3 Over
Current warning. It is user-adjustable from 10…100% for the FLA Setting
(Parameter 171).
Table 112 - 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 Electronic Overload 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 the installer 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.
Default Value 90
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
IMPORTANT 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.