Parameter and variable descriptions 6-25 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
Page 81
PARAMETER AND VARIABLE DESCRIPTIONS
6-25
1557-UM050F-EN-P – June 2013
12 Motor Converter Protection Parameters
Motor Overcurrent Trip [Motor O/C trip]
Linear number:
177
Minimum value:
0.00 pu
Maximum value:
2.00 pu
Default value:
1.50 pu
This parameter specifies the level the motor current must exceed before a motor overcurrent fault is indicated.
Motor Overcurrent Delay [Motor O/C delay]
Linear number:
178
Minimum value:
0.000 sec
Maximum value:
0.100 sec
Default value:
0.020 sec
This parameter specifies the time the motor current must remain above the trip level before a motor overcurrent
fault is indicated.
Motor Overload Trip [Motor O/L trip]
Linear number:
179
Minimum value:
0.20 pu
Maximum value:
1.15 pu
Default value:
1.00 pu
This parameter specifies the maximum continuous operating current of the motor.
Motor Overload Delay [Motor O/L delay]
Linear number:
180
Minimum value:
0 sec
Maximum value:
61 sec
Default value:
60 sec
This parameter specifies the time the motor may operate at 1.5 times the overload trip level before a motor
converter overload fault is indicated.
Motor Overvoltage Trip [Motor O/V trip]
Linear number:
181
Minimum value:
0.00 pu
Maximum value:
1.50 pu
Default value:
1.20 pu
This parameter specifies the level the motor voltage must exceed before a motor overvoltage fault is indicated.
Motor Over Voltage Delay [Motor O/V delay]
Linear number:
182
Minimum value:
0.000 sec
Maximum value:
10.000 sec
Default value:
0.050 sec
This parameter specifies the time the motor voltage must remain above the trip level before a motor over
voltage fault is indicated.
Motor Unbalance Trip [Motor U/B trip]
Linear number:
183
Minimum value:
0.00 pu
Maximum value:
1.00 pu
Default value:
0.10 pu
This parameter specifies the level the motor current unbalance must exceed before a motor unbalance fault is
indicated.
This parameter was added in Rev 5.30 and is not present in 4.xx.