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 81)

Rockwell Automation Publication 193-UM002I-EN-P - December 2011 81
Protective Trip & Warning Functions Chapter 3
• Total Reactive Power is equal to or greater than OVARG Trip Level for a
time period greater than the programmed OVARG Trip Delay.
When the over reactive power generated trip conditions are satisfied, the:
• bit 5 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).
OVARG Inhibit Time, Parameter 261, allows the installer to inhibit an over
reactive power generated trip from occurring during the motor starting sequence
and is adjustable from 0…250 seconds.
OVARG Trip Delay, Parameter 262, allows the installer to define the time period
an over reactive power generated condition must be present before a trip occurs.
It is adjustable from 0.1…25.0 seconds.
OVARG Trip Level, Parameter 263, allows the installer to define the total
reactive power generated in which the E3 Plus Overload Relay will trip. It is
adjustable from -32767 …0.
Over Reactive Power Generated Warning
The E3 Overload Relay will immediately indicate an over reactive generated
power warning condition if:
• no warning currently exists,
• Over Reactive Power Generated Warning is enabled,
• OVARG Inhibit Time has expired, and
• Total Reactive Power is equal to or greater than the OVARG Warn Level.
When the over reactive power generated warning conditions are satisfied, the:
• TRIP/WARN LED will flash an amber 2 long and 6 short blink pattern,
• bit 5 in PW Warn Status, Parameter 228, will set to “1”, and
• bit 1 of Device Status, Parameter 21, will set to “1”.
OVARG Warn Level, Parameter 264, allows the installer to define the total
reactive power generated in which the E3 Plus Overload Relay will indicate a
warning and is adjustable from -32767…0.
Apparent Power (kVA)
Protection
The E3 Plus Model EC5 has the capability to protect against apparent power
(kVA) for specific applications that require the monitoring of both voltage and
current. The user can protect or issue a warning in the event that the apparent
power (kVA) consumption of an electric motor is either too high or too low.