Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 177)

Rockwell Automation Publication 193-UM015B-EN-P - June 2014 177
Protective Trip and Warning Functions Chapter 5
Table 174 - Under kVA Trip Delay (Parameter 403)
Under kVA Trip Level
Under kVA Trip Level (Parameter 404) allows the installer to define the apparent
power (kVA) at which the E300 Electronic Overload Relay will trip on an under
apparent power (kVA). It is user-adjustable from 0…2,000,000 kVA.
Table 175 - Under kVA Trip Level (Parameter 404)
Under kVA Warning
The E300 Electronic Overload Relay will indicate an Under kVA warning if:
• No warning currently exists
• Under kVA Warning is enabled
• Current is present
• Voltage is present
• Under kVA Inhibit Time has expired
• The total apparent power (kVA) is equal to or less than the Under kVA
Warning Level
When the Under kVA Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 2-long / 7-short blink pattern
• Bit 6 in Power Warning Status (Parameter 12) will set to 1
Default Value 1.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Sec
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 Under 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 under apparent power (kVA) condition until the Under kVA
Inhibit Time expires.