Rockwell Automation Allen-Bradley E300

144 Rockwell Automation Publication 193-UM015D-EN-P - February 2015
Chapter 6 Protective Trip and Warning Functions
Table 177 - Ground Fault Inhibit Time (Parameter 242
Table 178 - Device Status 0 (Parameter 20)
Ground Fault Trip
The E300 Electronic Overload Relay trips with a ground fault indication if:
• No trip currently exists
• Ground fault protection is enabled
• Ground fault current is present
• Ground Fault Inhibit Time has expired
• Ground Fault Current is equal to or greater than the Ground Fault Trip
Level for a time period greater than the Ground Fault Trip Delay
If the E300 Electronic Overload Relay trips on a ground fault, the:
• TRIP/WARN LED flashes a red 3-short blink pattern
• Bit 2 in Current Trip Status (Parameter 4) sets to 1
Ground Fault Inhibit Time (Parameter 242)
Default Value 0
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Seconds
Bit
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Function
X
Trip Present
X
Warning Present
X
Invalid Configuration
X
Current Present
X
Ground Fault Current Present
X
Voltage Present
X
Emergency Start Enabled
X
DeviceLogix Enabled
X
Feedback Timeout Enabled
X
Operator Station Present
X
Voltage Sensing Present
XInternal Ground Fault Sensing
Present
XExternal Ground Fault Sensing
Present
X
PTC Sensing
X
Ready

Reserved