Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 110)

110 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
Table 94 - L1 Under Current Trip Delay (Parameter 266)
L1 Under Current Trip Level
L1 Under Current Trip Level (Parameter 267) allows the installer to define the
current at which the E300 Electronic Overload Relay will trip on a L1 Under
Current. It is user-adjustable from 10…100% of the FLA Setting (Parameter
171).
Table 95 - L1 Under Current Trip Level (Parameter 267)
L1 Under Current Warning
The E300 Electronic Overload Relay will indicate an L1 Under Current warning
if:
• No warning currently exists
• L1 Under Current Warning is enabled
• Current is present
• The Under Current Inhibit Timer has expired
• L1 Percent FLA (Parameter 47) is less than the L1 Under Current
Warning Level
Default Value 1.0
Minimum Value 0.1
Maximum Value 25.0
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 10
Units Sec
Default Value 35
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %FLA
IMPORTANT The Under Current Inhibit Timer starts after the maximum phase of load
current transitions from 0A to 30% of the device’s minimum FLA setting. The
E300 Electronic Overload Relay does not begin monitoring for an under current
condition until the Under Current Inhibit Time expires.
IMPORTANT For any given application, the practical limit of the L1 Under Current Trip Level
(Parameter 267), will be dependent on the FLA Setting and the lower limit of
the E300 Electronic Overload Relay’s current measurement capability