CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
105
SSW-06 offers two operation modes: Standard Connection or Inside
Delta Motor Connection.
When a Standard Connection is used, the motor is connected in
series to the Soft-Starter SSW-06 through three cables.
When an Inside Delta Connection is used, the Soft-Starter SSW-06
is connected separately in each winding through six cables (see item
3.2.5.2). In this type of connection, the current that flows through
the Soft-Starter SSW-06 is only the current of the inside delta motor
connection, in other words, 58% of the nominal motor current. This
characteristic changes the relation between the Soft-Starter SSW-
06 nominal currents and those of the motor. In this connection, the
Soft-Starter can be used with its nominal current dimensioned in
the following way:
- 1.5 times the nominal motor current during start;
- 1.73 times the nominal motor current during full voltage.
During the start, the relation is lower due to the characteristics that
are common to this type of connection (inside delta) the Thyristors
of the Soft-Starter need to conduct the same current for a lower
time period, increasing with this the losses in the Thyristor during
the start.
The standard connection requires less output wiring. The Inside Delta
Motor Connection requires double wiring, but for short distances,
this will be a cheaper option for the Soft-S motor + wiring
set.
ATTENTION!
Do not operate the motor when P150 has not been programmed
correctly. Soft-Starter SSW-06 can be seriously damaged when
this parameter has not been programmed correctly.
P150
(1)(2)
0 to 1
Inside Delta
[ 0=Inactive]
Motor Connection
-
Range
[Factory Setting]
Parameter
Unit
Description / Notes
P150
0 (Inactive)
1 (Active)
Action
Soft-Starter SSW-06 with standard motor connection
Soft-Starter SSW-06 with inside delta motor connection
Table 6.17
- Motor connection type
The models from 85A to 820A have an internal By-pass contactor.
The models from 950A to 1400A do not have an internal By-pass
contactor.
When P140=1 in the models with an internal By-pass, the internal
By-pass will not enable.
The external By-pass contactor is used:
(1)
Models without internal By-pass - To allow the connection of an
external By-pass contactor;
(2)
Models with internal By-pass - For instance when a direct start is
required in case of an emergency. The internal By-pass contactors
do not permit a direct start. These contactors can be enabled only
after the motor start has been realized by the thyristors;
(3)
Models with internal By-pass - If the motor stalls frequently during
By-pass condition.
NOTE!
See the recommended setup at items 3.3 and 3.3.12 for more
information.
Summary of Contents for SSW06
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