Parameter and variable descriptions 6-23 – Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE User Manual
Page 79
PARAMETER AND VARIABLE DESCRIPTIONS
6-23
1557-UM050F-EN-P – June 2013
Line Overvoltage Trip [Line O/V trip]
Linear number:
165
Minimum value:
0.00 pu
Maximum value:
1.50 pu
Default value:
1.20 pu
This parameter specifies the level the line voltage must exceed before a line overvoltage fault is indicated.
Line Overvoltage Delay [Line O/V delay]
Linear number:
166
Minimum value:
0.000 sec
Maximum value:
10.000 sec
Default value:
0.050 sec
This parameter specifies the time the line voltage must remain above the trip level before a line
overvoltage fault is indicated.
Line Undervoltage Trip [Line U/V trip]
Linear number:
167
Minimum value:
0.70 pu
Maximum value:
1.50 pu
Default value:
0.85 pu
This parameter specifies the level the line voltage must fall below before a line undervoltage condition is
indicated.
Line Undervoltage Delay [Line U/V delay]
Linear number:
168
Minimum value:
0.010 sec
Maximum value:
0.040 sec
Default value:
0.020 sec
This parameter specifies the time the line voltage must remain below the trip level before a line
undervoltage condition is indicated.
DC Link Overcurrent Trip [DC O/C trip]
Linear number:
169
Minimum value:
0.10 pu
Maximum value:
2.00 pu
Default value:
2.00 pu
This parameter specifies the level the dc link current must exceed before a dc link overcurrent fault is indicated.
NOTE: For current ratings near the maximum for the drive frame size, this parameter will be automatically
limited to a maximum value less than 2.00. This feature was added in Rev 4.60/5.10.
DC Link Overcurrent Delay [DC O/C delay]
Linear number:
170
Minimum value:
0.000 sec
Maximum value:
0.040 sec
Default value:
0.004 sec
This parameter specifies the time the dc link current must remain above the trip level before a dc link
overcurrent fault is indicated.
NOTE: For Bulletin 1557M Drives, this parameter is internally limited to 0.004 sec maximum.
Ground Fault Overcurrent Trip [Gnd flt O/C trip]
Linear number:
171
Minimum value:
0.0 A
Maximum value:
1.0 A
Default value:
0.5 A
This parameter specifies the level the ground fault current signal must exceed before a ground fault overcurrent
is indicated.