Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 180)

180 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Table 178 - Over kVA Trip Level (Parameter 408)
Over kVA Warning
The E300 Electronic Overload Relay will indicate an Over kVA warning if:
• No warning currently exists
• Over kVA Warning is enabled
• Current is present
• Voltage is present
• Over kVA Inhibit Time has expired
• The total apparent power (kVA) is equal to or greater than the Over kVA
Warning Level
When the Over kVA Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 2-long / 8-short blink pattern
• Bit 7 in Power Warning Status (Parameter 12) will set to 1
• Bit 1 in Device Status 0 (Parameter 20) will set to 1
• Any relay outputs configured as a Warning Alarm will close
Over kVA Warn Level
Over kVA Warn Level (Parameter 409) allows the user to define the apparent
power (kVA) at which the E300 Electronic Overload Relay will indicate a
warning. It is user-adjustable from 0…2,000,000 kVA.
Table 179 - Over kVA Warn Level (Parameter 409)
Default Value 0.000
Minimum Value 0.000
Maximum Value 2,000,000.000
Parameter Type DINT
Size (Bytes) 4
Scaling Factor 1000
Units kVA
IMPORTANT The Over kVA Inhibit Time starts after a phase voltage transitions from 0V to
20V L-L and a phase of load current transitions from 0A to 30% of the device’s
minimum FLA setting. The E300 Electronic Overload Relay does not begin
monitoring for an over apparent power (kVA) condition until the Over kVA
Inhibit Time expires.
Default Value 0.000
Minimum Value 0.000
Maximum Value 2,000,000.000
Parameter Type DINT
Size (Bytes) 4
Scaling Factor 1000
Units kVA