396 Rockwell Automation Publication 193-UM015E-EN-P - October 2015
Chapter 6 Protective Trip and Warning Functions
Under kVAR Consumed Trip Level
Under kVAR Consumed Trip Level (Parameter 388) allows you to define the
reactive power (kVAR) consumed at which the E300 relay trips on an under
reactive power (kVAR) consumed. It is user-adjustable from 0…2,000,000 kW.
Table 330 - Under kVAR Consumed Trip Level (Parameter 388)
Under kVAR Consumed Warning
The E300 relay indicates an Under kVAR Consumed warning if:
• No warning currently exists
• Under kVAR Consumed Warning is enabled
• Current is present
• Voltage is present
• Under kVAR Consumed Inhibit Time has expired
• The total reactive power (kVAR) consume
d i
s equal to or less than the
Under kVAR Consumed Warning Level
When the Under kVAR Consumed Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 2-long / 3-short blink pattern
• Bit 2 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 close
Under kVAR Consumed Warn Level
Under kVAR Consumed Warn Level (Parameter 389) allows you to define the
reactive power (kVAR) consumed at which the E300 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 Consumed 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 relay does not begin
monitoring for an under reactive power (kVAR) consumed condition until the
Under kVAR Consumed Inhibit Time expires.
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