Automationdirect.com Stellar SR44, User Manual

Page: 26 / 238

Chapter 2: Electrical Installation
2.3 – Standard Wiring Configurations
There are two standard wiring configurations for the connection of a motor, a motor controller
(Soft Starter), and the main power supply:
• In-line connection for Delta and Star (Wye) connected motors.
This is the recommended connection that is suitable for most motors.
• In-delta connection for Delta connected motors.
If required, the SR44 can be electrically installed within the delta windings.
2.3.1 – Wiring Diagram for In-Line Connection of Motors
Figure 2.3.1: Wiring Diagram for In-Line Connection of Motors
(Two legs of a 230V 3-phase power source can be used to provide 230V 1-phase control power.)
Mains
Supply
L1
L2
L3
Circuit
Contactor
Feeder cables
Isolation and Protection
Switch-gear
(provided by the customer)
Electrical
Ground
1
L1
2
T1
4
T2
6
T3
3
L2
5
L3
C1
Induction
Motor
SR44
L N
Control Supply
115VAC or 230VAC – set voltage switch acordingly
E-STOP STOP
START
C2
C2
C1
X1 X2
C2
SR44 Control Supply Card
SR44 Electronic Control Card
Control
Voltage
Switch
115V/230V
11
21
S1
14
24
S0
K1
K2
I/p1
The soft starter must be connected to a 3-phase power supply and a 3-phase load for proper operation.
Attempted starts will result in a starter fault if either the 3-phase power or the 3-phase load is not
connected.
Important:
Be sure to set the Control Voltage Switch to the proper control voltage setting
before applying voltage to the control circuit.
SR44 Series Soft Starter User Manual
1st Ed, Rev B 07/31/2019
2–4