ABB PSTX720 - Page 38

38 Connection | Installation and commissioning manual | 1SFC132081M0201
This chapter gives a description of the electrical
connections and connections for communication devices.
WARNING
Installation of electrical connections must be
done by authorized personnel. Obey all laws and
regulations.
WARNING
Dangerous voltage. Can cause death or serious
injury. Always set the power switch to off and lock
out all power to this device before you start to
work on the equipment.
WARNING!
Before you connect the Softstarters PSTX30...
PSTX170 to the operation voltage for the first time,
apply control supply voltage to open the bypass
relays. (see 2.1 Connection). This is necessary to
avoid an accidental start of the equipment while it is
connected to operation voltage.
INFORMATION
ABB personnel must obey the instructions in
ABBCISE15.4.
For basic connection, see
chapter 2 Quick start.
For wiring diagrams, see
chapter 11 Wiring and
application diagrams.
5.1 Electrical connection
WARNING
Capacitors for power factor compensation are
not permitted in between the Softstarter and the
motor, because this can cause current peaks
which can burn the thyristors in the Softstarter. If
you must use such capacitors, connect them on
the line side of the Softstarter.
5.1.1 Main circuit
INFORMATION
The maximum allowed voltage dip between
Softstarter and motor is 5% despite the different
cable length. The load must be inductive or
resistive. The softstarter can’t start a capacitive
load.
Softstarters PSTX30...PSTX1250 can be connected InLine,
see
1
Figure 5.1, and Inside Delta, see
2
Figure 5.1.
Use wire connection for PSTX30...105 see Figure 5.2
Terminal connection for PSTX142...1250 see Figure 5.3.
• Connect the line side to terminals 1L1, 3L2, 5L3, see
1
in Figure 5.2 and Figure 5.3.
• Connect the motor to terminals 2T1, 4T2, 6T3 on the
motor side, see
2
in Figure 5.2 and Figure 5.3.
The terminal marking is printed on the front of the
Softstarter. For tightening torques and cable thickness,
see chapter 5.1.1.1 Tightening torques and cable
dimensions
.
1 2
Figure 5.1
In line (1) and inside delta (2) connection
PSTX
PSTX
1SFC132081M0201
Figure 5.2
Clamp connection
1SFC132081M0201
Line side
1L1
3L2
5L3
6T3
4T2
2T1
Motor side
1
2
Figure 5.3
Terminal connection bar
Line side
2T1
4T2
6T3
5L3
3L2
1L2
Motor side
1SFC132081M0201
1
2
5