Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 175)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 175
Protective Trip and Warning Functions Chapter 5
Apparent Power (kVA) Protection
The E300 Electronic Overload Relay has the capability to protect against
apparent power (kVA) for specific applications that require the monitoring of
both voltage and current. The user can protect or issue a warning in the event that
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 the installer 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 172 - Under kVA Inhibit Time (Parameter 402)
Over kVA Inhibit Time
Over kVA Inhibit Time (Parameter 406) allows the installer 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 173 - Over kVA Inhibit Time (Parameter 406)
Under kVA Trip
The E300 Electronic Overload Relay will trip with an Under kVA indication if:
IMPORTANT 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 Sec
Default Value 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Sec