Allen-Bradley E300 User Manual

Rockwell Automation Publication 193-UM015E-EN-P - October 2015 383
Protective Trip and Warning Functions Chapter 6
Table 309 - 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 relay trips on an over frequency. It is user-adjustable from 46…65
Hz.
Table 310 - Over Frequency Trip Level (Parameter 375)
Over Frequency Warning
The E300 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
Wa
rn
in g L e vel
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 relay does not begin monitoring for an over frequency
condition until the Over Frequency Inhibit Time expires.

Allen-Bradley E300 Specifications

General

Brand	Allen-Bradley
Model	E300
Category	Other
Language	English