Allen-Bradley E300 - Page 411

Rockwell Automation Publication 193-UM015E-EN-P - October 2015 411
Protective Trip and Warning Functions Chapter 6
Table 347 - Over kVA Trip Level (Parameter 408)
Over kVA Warning
The E300 relay indicates 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
Wa
rn
in g L e vel
When the Over kVA Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow 2-long / 8-short blink pattern
• Bit 7 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
Over kVA Warn Level
Over kVA Warn Level (Parameter 409) allows you to define the apparent power
(kVA) at which the E300 relay indicates a warning. It is user-adjustable from
0…2,000,000 kVA.
Table 348 - 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 0 A to 30% of the
minimum FLA setting of the device. The E300 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