Rockwell Automation Publication 193-UM015D-EN-P - February 2015
203
Protective Trip and Warning Functions
Chapter 6
Table 244 - Over Frequency Trip Delay (Parameter 374)
Over Frequency Trip Level
Over Voltage Trip Level (Parameter 375) allows you to define the frequency at
which the E300 Electronic Overload Relay trips on an over frequency. It is user-
adjustable from 46…65 Hz.
Table 245 - Over Frequency Trip Level (Parameter 375)
Over Frequency Warning
The E300 Electronic Overload Relay indicates an Over Frequency warning if:
•
No warning currently exists
•
Over Frequency Warning is enabled
•
Voltage is present
•
Over Frequency Inhibit Time has expired
•
The voltage frequency is equal to or greater than the Over Frequency
Warning Level
When the Over Frequency Warning conditions are satisfied, the:
•
TRIP/WARN LED flashes a yellow 1-long / 6-short blink pattern
•
Bit 5 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 closes
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
63
Minimum Value
46
Maximum Value
65
Parameter Type
USINT
Size (Bytes)
1
Scaling Factor
1
Units
Hz
IMPORTANT
The Over Frequency Inhibit Time starts after a phase voltage transitions from
0V to 20V L-L. The E300 Electronic Overload Relay does not begin monitoring
for an over frequency condition until the Over Frequency Inhibit Time expires.
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: ......