Rockwell Automation Publication 193-UM015D-EN-P - February 2015
199
Protective Trip and Warning Functions
Chapter 6
Table 240 - Over Frequency Inhibit Time (Parameter 373)
Under Frequency Trip
The E300 Electronic Overload Relay trips with an Under Frequency indication
if:
•
No trip currently exists
•
Under Frequency Trip is enabled
•
Voltage is present
•
Under Frequency Inhibit Time has expired
•
The voltage frequency is less than the Under Frequency Trip Level for a
time period greater than the Under Frequency Trip Delay.
If the E300 Electronic Overload Relay trips on an under frequency, the:
•
TRIP/WARN LED status indicator flashes a red 1-long / 5-short blink
pattern
•
Bit 4 in Voltage Trip Status (Parameter 5) sets to 1
•
Bit 0 in Device Status 0 (Parameter 20) sets to 1
•
Any relay outputs configured as a Trip Relay open
•
Any relay outputs configured as a Control Relay open
•
Any relay outputs configured as a Trip Alarm close
•
Any relay outputs configured as a Normal Relay are placed in their
Protection Fault state (if so programmed)
Default Value
10
Minimum Value
0
Maximum Value
250
Parameter Type
USINT
Size (Bytes)
1
Scaling Factor
1
Units
Seconds
Summary of Contents for Allen-Bradley E300
Page 1: ...E300 Electronic Overload Relay Bul 193 592 User Manual...
Page 128: ...128 Rockwell Automation Publication 193 UM015D EN P February 2015 Chapter 5 Operating Modes...
Page 304: ...304 Rockwell Automation Publication 193 UM015D EN P February 2015 Chapter 7 Commands Notes...
Page 502: ...502 Rockwell Automation Publication193 UM015D EN P November 2013 Appendix B Parameter List...
Page 545: ......