WEG SRW 01, User Manual

Page: 82 / 148

Parameterization
5-36 | SRW 01
5
NOTE!
The protection of Imbalance between phases works only with three-phase motors.
P614 – Current Imbalance
Adjustable
Range:
5 to 100 % Factory
Setting:
40 %
Proprieties:
Sys, rw
Description:
It defines the percentage of current Imbalance between the phase.
P615 – Current Imbalance Time
Adjustable
Range:
0 = Disabled
1 to 99 s = Enabled
Factory
Setting:
3 s
Proprieties: Sys, rw
Description:
It defines the allowed time with the imbalanced current before switching off the motor or indicating an alarm. If
P615 = 0, the function remains disabled.
P616 – Current Imbalance Protection Action
Adjustable
Range:
0 = Alarm
1 = Switch Off (Trip)
Factory
Setting:
1
Proprieties: Sys, rw
Description:
It defines the action of the current imbalance protection.
5.7.4 Earth Fault
The earth fault protection is achieved by means of the vector sum of the currents of the three motor phases, and it
is indicated only for equipment protection. The earth fault current is defined through the parameter P617 and has
a range from 40 to 100 % of the motor nominal current.
NOTE!
The Earth Fault protection works only with three-phase motors.
NOTE!
If the Earth Fault is enabled during a star/delta starting, incorrect actuations may occur. This happens
during the delta operation, because due to the harmonics the sum of the currents is different from zero.
P617 – Earth Fault
Adjustable
Range:
40 to 100 % Factory
Setting:
50 %
Proprieties: Sys, rw
Description:
It defines the percentage of the earth fault current.