Rockwell Automation Liqui-Flo V2.0 AC Drive User Manual
Page 81
Rockwell Automation Publication D2-3518-3 - May 2013
81
Chapter 9
Selects the output frequency below which the motor operating current is derated.
The motor thermal overload then generates a fault at lower levels of current. For
all settings of overload Hz other than zero, the overload capacity is reduced to
70% when output frequency is zero.
Sets the RMS amps threshold for motor overload fault. In order for the motor
overload fault (48) to occur, it must be enabled using inverter parameter Fault
Config 1 (238).
The drive output current is visible in inverter parameter Output Current (3).
The motor overload fault occurs under these conditions:
•
If the drive output (motor) current is 138% of Motor OL Amps, the fault
occurs at 1.5 seconds.
•
If the drive output (motor) current is greater than 138% of Motor OL
Amps, the fault occurs in less than 1.5 seconds.
•
If the drive output (motor) current is between 102% and 138% of Motor
OL Amps, the fault occurs in greater than 1.5 seconds.
•
If the drive output (motor) current is less than 102% of Motor OL Amps,
the fault does not occur.
Motor overload fault percent trip is visible in inverter parameter Motor OL
Count (220). The fault occurs when this parameter reaches 100%. This
parameter does not increase unless the drive output current is greater than 102%
of Motor OL Amps.
47
Motor OL Hertz
Range:
0.0...400.0 Hz [0.1 Hz]
Default:
0
Access:
0
Path: Motor Control > Motor Data
See also:
42, 48, 220
48
Motor OL Amps
Range:
1.0...2000.0 [0.1 A]
Default:
Based on Drive Type
Access:
1
Path: Motor Control > Motor Data
See also:
42, 47, 220