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 85)

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 85
Protective Trip & Warning Functions Chapter 3
Under Power Factor Lagging Warning
The E3 Overload Relay will immediately indicate an under power factor lagging
warning condition if:
• no warning currently exists,
• Under Power Factor Lagging Warning is enabled,
• UPFLG Inhibit Time has expired, and
• Total PF is equal to or less than the UPFLG Warn Level.
When the under power factor lagging warning conditions are satisfied, the:
• TRIP/WARN LED will flash an amber 2 long and 9 short blink pattern,
• bit 8 in PW Warn Status, Parameter 228, will go to “1”, and
• bit 1 of Device Status, Parameter 21, will go to “1”.
UPFLG Warn Level, Parameter 276, allows the installer to define the total power
factor lagging in which the E3 Plus Overload Relay will indicate a warning and is
adjustable from 0…32767.
Over Power Factor Lagging Trip
The E3 Overload Relay will trip with an over power factor lagging indication if:
• no trip currently exists,
• Over Power Factor Lagging protection is enabled,
• OPFLG Inhibit Time has expired, and
• Total PF is equal to or greater than OPFLG Trip Level for a time period
greater than the programmed OPFLG Trip Delay.
When the over power factor lagging trip conditions are satisfied, the:
• TRIP/WARN LED will flash a red 2 long and 10 short blink pattern
• bit 9 in PW Trip Status, Parameter 227, will set to “1”,
• bit 0 of Device Status, Parameter 21, will set to “1”,
• Trip Relay contact will be open, and
• outputs will be placed in their Protection Fault state (if so programmed).
OPFLG Inhibit Time, Parameter 277, allows the installer to inhibit an over
power factor lagging trip from occurring during the motor starting sequence and
is adjustable from 0…250 seconds.
OPFLG Trip Delay, Parameter 278, allows the installer to define the time period
an over power factor lagging condition must be present before a trip occurs. It is
adjustable from 0.1…25.0 seconds.