Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 137)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 137
Protective Trip and Warning Functions Chapter 5
Table 124 - Under Voltage Trip Level (Parameter 357)
Under Voltage Warning
The E300 Electronic Overload Relay will indicate an Under Voltage warning if:
• No warning currently exists
• Under Voltage Warning is enabled
• Voltage is present
• Under Voltage
• Inhibit Time has expired
• The minimum phase voltage is equal to or less than the Under Voltage
Warning Level
When the Under Voltage Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 1-long / 1-short blink pattern
• Bit 0 in Voltage Warning Status (Parameter 11) 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
Under Voltage Warn Level
Under Voltage Warn Level (Parameter 358) allows the user to define the voltage
at which the E300 Electronic Overload Relay will indicate a warning. It is user-
adjustable from 0…6553.5 volts.
Table 125 - Under Voltage Warn Level
Default Value 100.0
Minimum Value 0.0
Maximum Value 6553.5
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 10
Units Volts
IMPORTANT The Under Voltage Inhibit Time starts after a phase voltage transitions from 0V
to 20V L-L. The E300 Electronic Overload Relay does not begin monitoring for
an under voltage condition until the Under Voltage Inhibit Time expires.
Default Value 400.0
Minimum Value 0.0
Maximum Value 6553.5
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 10
Units Volts