User Manual User Manual

190 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Table 191 - Under Power Factor Leading Trip Level (Parameter 420)
Under Power Factor Leading Warning
The E300 Electronic Overload Relay will indicate an Under Power Factor
Leading warning if:
• No warning currently exists
• Under Power Factor Leading Warning is enabled
• Current is present
• Voltage is present
• Under Power Factor Leading Inhibit Time has expired
• The total power factor leading is equal to or less than the Under Power
F
a
ctor Leading Warning Level
When the Under Power Factor Leading Warning conditions are satisfied, the:
• TRIP/WARN LED will flash a yellow 2-long / 11-short blink pattern
• Bit 10 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
Under Power Factor Leading Warn Level
Under Power Factor Leading Warn Level (Parameter 421) allows the user to
define the power factor leading at which the E300 Electronic Overload Relay will
indicate a warning. It is user-adjustable from 0…2,000,000 kW.
Default Value 90
Minimum Value 100
Maximum Value 0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %
IMPORTANT
The Under Power Factor Leading 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 power factor leading condition
until the Under Power Factor Leading Inhibit Time expires.