Rockwell Automation 193-EC1_2_3_5, 193-ECPM,592-EC1_2_3_5 E3 and E3 Plus Solid-State Overload Relay User Manual - Manual (Page 68)

68 Rockwell Automation Publication 193-UM002I-EN-P - December 2011
Chapter 3 Protective Trip & Warning Functions
Under Voltage (UV) Warning
The E3 Overload Relay will immediately indicate an under voltage warning
condition if:
• no warning currently exists,
• UV Warning is enabled,
• UV Inhibit Time has expired, and
• Average Voltage L-L is equal to or less than the UV Warn Level.
When the under voltage warning conditions are satisfied, the:
• TRIP/WARN LED will flash an amber 1 long and 2 short blink pattern,
• bit 1 in V Warning Status, Parameter 161, will set to “1”, and
• bit 1 of Device Status, Parameter 21, will go to “1”.
UV Warn Level, Parameter 218, allows the installer to define the average L-L
voltage in which the E3 Plus Overload Relay will indicate a warning and is
adjustable from 0…65535V.
Over Voltage (OV) Trip
The E3 Overload Relay will trip with an over voltage indication if:
• no trip currently exists,
• OV Protection is enabled,
• OV Inhibit Time has expired, and
• Average Voltage L-L is equal to or greater than OV Trip Level for a time
period
• greater than the programmed OV Trip Delay.
When the over voltage trip conditions are satisfied, the:
• TRIP/WARN LED will flash a red 1 long and 3 short blink pattern,
• bit 2 in Parameter 160, V Trip Status, will set to “1”
• bit 0 of Parameter 21, Device Status, will set to “1”
• Trip Relay contact will be open, and
• outputs will be placed in their Protection Fault state (if so programmed).
OV Inhibit Time, Parameter 219, allows the installer to inhibit an over voltage
trip from occurring during the motor starting sequence and is adjustable from
0…250 seconds.
OV Trip Delay, Parameter 220, allows the installer to define the time period an
over voltage condition must be present before a trip occurs. It is adjustable from
0.1…25.0 seconds.