Rockwell Automation Allen-Bradley E300, User Manual

Page: 146 / 546

146 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
Table 179 - Ground Fault Trip Delay (Parameter 243)
Ground Fault Trip Level
Ground Fault Trip Level (Parameter 244) allows you to define the ground fault
current in which the E300 Electronic Overload Relay trips and is adjustable
from:
•
0.500…5.00 A (Internal)
• 0.020…5.00 A (External)
Table 180 - Ground Fault Trip Level (Parameter 244)
Ground Fault Warning
The E300 Electronic Overload Relay indicates a ground fault warning if:
• No warning currently exists
• Ground Fault Warning is enabled
• Current is present
• Ground Fault Inhibit Time has expired
Ground Fault Trip Delay (Parameter 243)
Default Value 0.5
Minimum Value 0.0
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Seconds
Ground Fault Trip Level (Parameter 244)
Default Value 2.5
Minimum Value 0.5 (internal); 0.02 (external)
Maximum Value 5.00
Parameter Type UINT
Size (Bytes) 2
Scaling Factor 100
Units Amps
IMPORTANT
The ground fault inhibit timer starts after the maximum phase load current
transitions from 0 A to 30% of the minimum FLA rating of the device or the
ground fault current is greater than or equal to 50% of the minimum ground
fault current rating of the device. The E300 Electronic Overload Relay does not
begin monitoring for a ground fault condition until the Ground Fault Current
Inhibit Time expires.