Rockwell Automation Publication 193-UM015E-EN-P - October 2015 393
Protective Trip and Warning Functions Chapter 6
Reactive Power (kVAR) Protection
The E300 relay has the capability to help protect against reactive power (kVAR)
for specific applications that require the monitoring of both voltage and current.
You can help protect or issue a warning if the reactive power (kVAR) of an electric
motor is either too high or too low.
Under kVAR Consumed Inhibit Time
Under kVAR Consumed Inhibit Time (Parameter 386) allows you to inhibit an
under reactive power (kVAR) consumed trip and warning from occurring during
the motor starting sequence. It is adjustable from 0…250 seconds.
Table 325 - Under kVAR Consumed Inhibit Time (Parameter 386)
Over kVAR Consumed Inhibit Time
Over kVAR Consumed Inhibit Time (Parameter 390) allows you to inhibit an
over reactive power (kVAR) consumed trip and warning from occurring during
the motor starting sequence. It is adjustable from 0…250 seconds.
Table 326 - Over kVAR Consumed Inhibit Time (Parameter 390)
The Over kW Warning function does not include a time delay feature. Once the
Over kW Inhibit Time has expired, the Over kW Warning indication is
instantaneous.
Default Value 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Seconds
Default Value 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Seconds
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