Rockwell Automation 592- E300 Overload Relay User Manual - Manual (Page 144)

144 Rockwell Automation Publication 193-UM015B-EN-P - June 2014
Chapter 5 Protective Trip and Warning Functions
• Any relay outputs configured as a Warning Alarm will close
Voltage Imbalance Warning Level
Voltage Imbalance Warning Level (Parameter 368) allows the user to define the
percentage at which the E300 Electronic Overload Relay will indicate a warning.
It is user-adjustable from 10…100%.
Table 132 - Voltage Imbalance Warning Level (Parameter 368)
Phase Rotation Protection
Wiring of a three-phase voltage system can affect the rotational direction of an
electric motor. The E300 Electronic Overload Relay can protect against the
improper phase rotation so that an electric motor rotates in the proper direction,
ABC or ACB, to prevent equipment from being damaged.
Phase Rotation Inhibit Time
Phase Rotation Inhibit Time (Parameter 359) allows the installer to inhibit a
phase rotation mismatch trip and warning from occurring. It is adjustable from
0…250 seconds.
Table 133 - Phase Rotation Inhibit Time (Parameter 363)
Default Value 10
Minimum Value 10
Maximum Value 100
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units %
IMPORTANT The Voltage Imbalance Warning function does not include a time delay feature.
Once the Voltage Imbalance Inhibit Time has expired, the Voltage Imbalance
Warning indication is instantaneous.
Default Value 10
Minimum Value 0
Maximum Value 250
Parameter Type USINT
Size (Bytes) 1
Scaling Factor 1
Units Sec