Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 82)

6-26 PARAMETER AND VARIABLE DESCRIPTIONS
1557-UM050F-EN-P – June 2013
Motor Unbalance Delay [Motor U/B delay]
Linear number:
184
Minimum value: 0.00 sec
Maximum value: 10.00 sec
Default value: 2.00 sec
This parameter specifies the time the motor current unbalance must remain above the trip level before a motor
unbalance fault is indicated.
This parameter was added in Rev 5.30 and is not present in 4.xx.
Motor Over Speed Trip [Over speed trip]
Linear number:
185
Minimum value: 10 Hz
Maximum value: 100 Hz
Default value: 66 Hz
This parameter specifies the level the motor speed must exceed before a motor overspeed fault is indicated.
Motor Overspeed Delay [Overspeed delay]
Linear number:
186
Minimum value: 0.00 sec
Maximum value: 10.00 sec
Default value: 0.50 sec
This parameter specifies the time the motor speed must exceed the trip level before a motor overspeed fault is
indicated.
Motor DC Link Over Voltage Trip [Mtr DC O/V trip]
Linear number:
187
Minimum value: 0.10 pu
Maximum value: 1.47 pu
Default value: 1.47 pu
This parameter specifies the level the machine side dc link voltage must exceed before a dc link over voltage
fault is indicated.
DC Link Overvoltage Delay [DC O/V delay]
Linear number:
188
Minimum value: 0.000 sec
Maximum value: 0.040 sec
Default value: 0.004 sec
This parameter specifies the time the machine side dc link voltage must remain above the trip level before a dc
link overvoltage fault is indicated.
Note: For Bulletin 1557M drives this parameter is internally limited to 0.004 sec maximum.
Ground Fault Overvoltage Trip [Gnd flt O/V trip]
Linear number:
189
Minimum value: 0.00 pu
Maximum value: 1.50 pu
Default value: 0.20 pu
This parameter specifies the level the motor neutral to ground voltage must exceed before a ground fault
overvoltage is indicated.
Note: The value of this parameter must be increased for drives without isolation transformers because the
neutral to ground voltage will be quite high in normal operation.