226 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
Apparent Power (kVA) Protection
The E300 Electronic Overload Relay has the capability to help protect against
apparent power (kVA) for specific applications that require the monitoring of
both voltage and current. You can help protect or issue a warning if the apparent
power (kVA) consumption of an electric motor is either too high or too low.
Under kVA Inhibit Time
Under kVA Inhibit Time (Parameter 402) allows you to inhibit an under
apparent power (kVA) trip and warning from occurring during the motor starting
sequence. It is adjustable from 0…250 seconds.
Table 276 - Under kVA Inhibit Time (Parameter 402)
Over kVA Inhibit Time
Over kVA Inhibit Time (Parameter 406) allows you to inhibit an over apparent
power (kVA) trip and warning from occurring during the motor starting
sequence. It is adjustable from 0…250 seconds.
Table 277 - Over kVA Inhibit Time (Parameter 406)
Under kVA Trip
The E300 Electronic Overload Relay trips with an Under kVA indication if:
The Over kVAR Generated Warning function does not include a time delay
feature. Once the Over kVAR Generated Inhibit Time has expired, the Over kVAR
Generated 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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