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Chapter 7- Multi-purpose application
POWERXL DM1 SERIES VARIABLE FREQUENCY DRIVES
MN040049EN—September 2021 www.eaton.com
Table 62. Protections (Cont.).
P6.1.2
ab
Ground fault
ID 309
Minimum value:
N.A.
Maximum value:
N.A.
Default value:
2
Options:
0 = No response;
1 = Warning;
2 = Fault - stop mode after fault according to parameter stop mode; or
3 = Fault - stop mode after fault always by coasting.
Description:
Earth (ground) faul
t protection ensures that the sum of the motor phase currents is zero. There is a current level setting parameter
ground fault limit that allows for setting the allowable ground current level based off the total drive current. The overcurrent protection
is always working and protects the frequency converter from earth faults with high currents. Frequency converter will correspond the
setting (see Options above).
P6.1.3
ab
Ground fault limit
ID 2158
Minimum value:
0%
Maximum value:
30%
Default value:
15%
Description:
Sets the level of the ground fault protection. This protection is based off the amount of leakage current that is seen to ground on the
output of the drive.
P6.1.4
ab
Motor thermal protection
ID 310
Minimum value:
N.A.
Maximum value:
N.A.
Default value:
2
Options:
0 = No response;
1 = Warning;
2 = Fault - stop mode after fault according to parameter stop mode; or
3 = Fault - stop mode after fault always by coasting.
Description:
If a fault condition is selected, the drive will stop and activate the fault stage based off the % of calculated motor temperature. The
calculated motor temp is based off the install power on values of the drive and monitoring values as the drive is running. Deactivating
this protection, i.e., setting parameter to 0, will reset the thermal stage of the motor to 0%.
P6.1.5
b
Motor thermal FO current
ID 311
Minimum value:
0.00%
Maximum value:
150.00%
Default value:
100.00%
Description:
The current can be set between 0 - 150.0% x InMotor. This parameter sets the value for thermal current at zero frequency.
The default value is set assuming that there is no external fan cooling the motor. If an external fan is used, this parameter can be set to
90% (or even higher).
Note:
The value is set as a percentage of the motor nameplate data, P1.6 (nominal current of the motor), not the drive’s nominal output
current. The motor’s nominal current is the current that the motor can withstand in direct on-line use without being overheated.
If you change the parameter nominal current of motor, this parameter is automatically restored to the default value.
Setting this parameter does not affect the maximum output current of the drive.
100%
0
Overload Area
Motor Thermal
FO Current
= 40%
Cooling
P
f
fn
IT