Rockwell Automation Publication 193-UM015E-EN-P - October 2015 375
Protective Trip and Warning Functions Chapter 6
Table 299 - Voltage Imbalance Trip Delay (Parameter 366)
Voltage Imbalance Trip Level
Voltage Imbalance Trip Level (Parameter 367) allows you to define the
percentage at which the E300 relay trips on a voltage imbalance. It is user-
adjustable from 10…100%.
Table 300 - Voltage Imbalance Trip Level (Parameter 367)
Voltage Imbalance Warning
The E300 relay indicates a voltage imbalance warning if:
• No warning currently exists
• Voltage Imbalance Warning is enabled
• Voltage is present
• Voltage Imbalance Inhibit Time has expired
• The Volt
age Imbalance (Parameter 61) is greater than the Voltage
Imba
lance Warning Level
When the Voltage Imbalance Warning conditions are satisfied, the:
• TRIP/WARN LED flashes a yellow red 1-long / 3-short blink pattern
• Bit 2 in Voltage Warning Status (Parameter 11) sets to 1
• Bit 1 in Device Status 0 (Parameter 20) sets to 1
• Any relay outputs configured as a Warning Alarm close
Default Value 1.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Seconds
Default Value 15
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %
The Voltage Imbalance Inhibit Timer starts after a phase voltage transitions
from 0V to 20V L-L. The E300 relay does not begin monitoring for a voltage
imbalance condition until the Voltage Imbalance Inhibit Time expires.
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