Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 171)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 171
Protective Trip and Warning Functions Chapter 5
Table 167 - Under kVAR Generated Trip Level (Parameter 396)
Under kVAR Generated Warning
The E300 Electronic Overload Relay will indicate an Under kVAR Generated
warning if:
• No warning currently exists
• Under kVAR Generated Warning is enabled
• Current is present
• Voltage is present
• Under kVAR Generated Inhibit Time has expired
• The total reactive power (kVAR) generated is equal to or less than the
Under kVAR Generated Warning Level
When the Under kVAR Generated Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 2-long / 5-short blink pattern
• Bit 4 in Power Warning Status (Parameter 12) 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 kVAR Generated Warn Level
Under kVAR Generated Warn Level (Parameter 397) allows the user to define
the reactive power (kVAR) generated at which the E300 Electronic Overload
Relay will indicate a warning. It is user-adjustable from 0…2,000,000 kW.
Default Value 0.000
Minimum Value 0.000
Maximum Value 2000000.000
Parameter Type DINT
Size (Bytes) 4
Scaling Factor 1000
Units kVAR
IMPORTANT The Under kVAR Generated Inhibit Time starts after a phase voltage transitions
from 0V to 20V L-L and a phase of load current transitions from 0A to 30% of
the device’s minimum FLA setting. The E300 Electronic Overload Relay does not
begin monitoring for an under reactive power (kVAR) generated condition until
the Under kVAR Generated Inhibit Time expires.