222 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
Table 271 - Under kVAR Generated Trip Level (Parameter 396)
Under kVAR Generated Warning
The E300 Electronic Overload Relay indicates 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 flashes a yellow 2-long / 5-short blink pattern
• Bit 4 in Power Warning Status (Parameter 12) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm closes
Under kVAR Generated Warn Level
Under kVAR Generated Warn Level (Parameter 397) allows you to define the
reactive power (kVAR) generated at which the E300 Electronic Overload Relay
indicates 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
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 0 A to 30% of
the minimum FLA setting of the device. 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.
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