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Installation - Power Wiring
(100A model and above)
Using 6 wire Configuration
The Smartstart 6000 can be configured to operate in 6
wire mode. 6 wire mode may be the preferred method
due to:
1. Possible reduction in the size of starter
required, saving on space and /or cost.
2. Wiring may already be present if a start/delta
type starter was previously used.
3. Reduced motor cable size.
The major advantage is that the current in the SCR
is 58% less than it would be for the same motor
connected in 3 wire. The diagram below illustrates
how the motor is connected in 6 wire, also known
as inside delta.
Technical Manual: Smartstart
®
6000
Page 10
The following illustrates the difference between 3 wire & 6
wire connection:
Current Monitoring & Torque Control:
For the torque control to operate correctly the C.T's
need to monitor the 'line' current and not the 'Phase'
currents. For this reason the C.T's normally supplied
internally, need to be relocated external to the soft
starter.
It is critical that the C.T's be installed in the correct
phase and in the correct direction. Page 12 provides
instructions as to where the C.T's are to be located.
Refer to page 12
For details on correctly installing
external C.T's
IMI0042 rev D
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