WEG SRW 01, Руководство пользователя

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Parameterization
SRW 01 | 5-37
5
P618 – Earth Fault Time
Adjustable
Range:
0 = Disabled
1 to 99 s = Enabled
Factory
Setting:
3 s
Proprieties: Sys, rw
Description:
It defines the allowed time with earth fault before switching off the motor or indicating an alarm. If P618 = 0, the
function remains disabled.
P619 – Earth Fault Protection Action
Adjustable
Range:
0 = Alarm
1 = Switch Off (Trip)
Factory
Setting:
1
Proprieties: Sys, rw
Description:
It defines the action of the earth fault protection.
5.7.5 Phase Loss (Current)
The phase loss protection monitors the current of the three motor phases. In case of the absence of one phase
longer than the time adjusted at the parameter P620, then the motor may be switched off or only an alarm be
activated, according to the parameter P621.
P620 – Phase Loss Time
Adjustable
Range:
0 = Disabled
1 to 99 s = Enabled Factory
Setting:
3 s
Proprieties: Sys, rw
Description:
It defines the allowed time with phase loss before switching off the motor or indicating an alarm. If P620 = 0, the
function remains disabled.
P621 – Phase Loss Protection Action
Adjustable
Range:
0 = Alarm
1 = Switch Off (Trip) Factory
Setting:
1
Proprieties: Sys, rw
Description:
It defines the action of the phase loss protection.
NOTE!
The phase loss protection works only with three-phase motors, but not when delta connection is used.
In this case, only the Imbalance and/or earth fault protections will work.
5.7.6 Overcurrent
The overcurrent protection is used independently from the overload protection. When the average current exceeds
the limit adjusted at the parameter P622 longer than the time defined in the parameter P623, then the motor may
be switched off or only an alarm be activated, according to the parameter P624.
The overcurrent protection has default values that work as the locked rotor protection, 400 % of the Motor Nominal
Current 1 (P401), and for the operation modes Dahlander and Pole Changing also the motor nominal current 2 (P402),
during 3 s.