Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 120)

120 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
• Any relay outputs configured as a Warning Alarm will close
L1 Over Current Warning Level
L1 Over Current Warning Level (Parameter 278) allows the user to define the
current at which the E300 Electronic Overload Relay will indicate a L1 Over
Current warning. It is user-adjustable from 10…100% for the FLA Setting
(Parameter 171).
Table 106 - L1 Over Current Warning Level (Parameter 278)
L2 Over Current Trip
The E300 Electronic Overload Relay will trip 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 Percent 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 Electronic Overload Relay trips on a L2 Over Current, the:
• TRIP/WARN LED status indicator will flash a red 12-short blink pattern
• Bit 11 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
• Any relay outputs configured as a Normal Relay will be placed in their
Protection 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
IMPORTANT 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.