Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 80)

6-24 PARAMETER AND VARIABLE DESCRIPTIONS
1557-UM050F-EN-P – June 2013
Ground Fault Overcurrent Delay [Gnd flt O/C dly]
Linear number:
172
Minimum value: 0.000 sec
Maximum value: 1.000 sec
Default value: 0.050 sec
This parameter specifies the time the ground fault current signal must remain above the trip level before a
ground fault overcurrent is indicated.
Line dc link Over Voltage Trip [Line DC O/V trip]
Linear number:
173
Minimum value: 0.10 pu
Maximum value: 1.47 pu
Default value: 1.47 pu
This parameter specifies the level the line side dc link voltage must exceed before a dc link over voltage fault is
indicated.
This parameter was added in Rev 4.55/5.10.
Line dc link Over Voltage Delay [Line DC O/V dly]
Linear number:
174
Minimum value: 0.00 sec
Maximum value: 0.040 sec
Default value: 0.010 sec
This parameter specifies the time the line side dc link voltage must remain above the trip level before a dc link
over voltage fault is indicated.
This parameter was added in Rev 4.55/5.10.
Fan Loss Trip [Fan loss trip]
Linear number:
175
Minimum value: 0.0 V
Maximum value: 9.9 V
Default value: 2.0 V
This parameter specifies the level that the output of the static pressure sensor in the converter cubicle must fall
to before a fan loss warning is indicated. If the pressure falls below 80% of the trip level, a fan loss fault will be
indicated and the drive will stop. This parameter is used for Powerflex drives only, because 1557 drives do not
have a pressure sensor.
This parameter was added in Rev 5.30 and is not present in 4.xx.
Fan Loss Delay [Fan loss delay]
Linear number:
176
Minimum value: 0.0 sec
Maximum value: 60.0 sec
Default value: 5.0 sec
This parameter specifies the time the static pressure in the converter cubicle must remain below the trip level
before a fan loss warning or fault is indicated. The delay must be longer than the starting time of the cooling
fan.
This parameter was added in Rev 5.30 and is not present in 4.xx.