WEG SSW-08 User Manual - page 41

5

Programming Information and Suggestions

36 | SSW-08

5.1.2 Current Limit Starting

1)  To start with a current limitation it is necessary to start with a load. Initial test without load can 

be done with a voltage ramp;

2) Set the acceleration time with the necessary starting time, initially with short times, 15 to 20 

seconds. This time will be used as the stall time in case the motor does not start;

3) Set the current limit according to the conditions that your electric installation allows, as well 

as to the values that supply enough torque to start the motor. It can initially be programmed 

with values between 2x and 3x the nominal current of the motor (ln of the motor).

I(A)

Start

I Limitation

I Nominal

Maximum Time

Current Limitation

0

t(s)

Enable

Disable

Figure 5.4: Current limit starting

NOTE!

If the current limit is not reached during the start, the motor will start immediately;

Very low Current Limit values do not provide sufficient torque to start the motor. 

Always keep the motor rotating once it is started.

For loads that need a higher initial starting torque, the Kick Start function can be used;

If faults occur during the start, check all the connections from the Soft-Starter to 

the supply network, motor connections, supply network voltage levels, fuses and 

circuit breakers.

5.1.3 Starting with Pump Control (P202 = 2)

1)  To start with pump control a load is necessary. No-load tests can be done with voltage ramp;

2)  The starting parameters setting depend mainly on the types of hydraulic installations. Thus 

we recommend optimizing factory settings, if possible.

3)  Check if the motor rotation direction is an indicated on the pump frame. If not, connect the 

phase sequence as indicated at P620;

Figure 5.5: Direction of rotation of a hydraulic centrifugal pump