Main Circuit - ABB PSTX30 Applications Manual

3 Connection
This chapter describes the electrical connections as well
as connections for communication devices that can be
connected to the softstarter.
WARNING
Mounting and electrical connections of the
softstarter shall be made in accordance with
local laws and regulations and be performed by
authorized personnel.
2
CAUTION
Hazardous voltage. Can cause death or serious
injury. Turn off and lock out all power supplying
this device before any work on the softstarter.
WARNING!
Apply the control supply voltage to make sure
that the bypass relays are in open position before
you connect the softstarters PSTX30...PSTX170
to operational voltage for the first time. If not, the
equipment can start accidentally. This is necessary to
avoid unintentional starting of the equipment during
the connection.
INFORMATION
ABB personell have to obey the instructions in
ABB CISE 15.4.
WARNING
Capacitors for power factor compensation
are not allowed in between the softstarter and
the motor, since this can cause current peaks
which can burn the thyristors in the softstarter. If
such capacitors are to be used, they should be
connected on the line side of the softstarter.
For more information, please see 1SFC132081M0201
- Softstarters Type PSTX30...PSTX370, Installation and
Commissioning Manual.
3.1

Main circuit

INFORMATION
The voltage dips may not be more than 5%
between softstarter and motor. The cable lenght
does not matter.
Softstarters PSTX30...PSTX370 can be connected both
In Line, see Figure 1,
1
and Inside Delta, see
Use wire connection for PSTX30...PSTX105 see Figure 2
and terminal connection for PSTX142...PSTX170
see Figure 3.
• Connect the line side to terminals 1L1, 3L2, 5L3, see
1
in Figure 2 and 3.
• Connect the motor to terminals 2T1, 4T2, 6T3 on the
motor side, see
The terminal marking is printed on the front of the
softstarter. For tightening torques and cable thickness,
Connection | Application manual: Waste water pump |
8
Figure 1.
2
2
in Figure 2 and 3.
1
1
PSTX
Figure 1: In line (1) and inside delta (2) connection
2
5L3
3L2
1L1
1
Line side
Figure 2: Terminal connection clamps
3
5L3
3L2
1L2
1
Line side
Figure 3: Terminal connection bars
see chapter 3.1.1 Tightening torques and cable
dimensions.
1SFC132104M0201
2
PSTX
Motor side
2
2T1
4T2
6T3
2
Motor side
2T1
4T2
6T3