External Bypass Contactor - ABB PST Installation And Maintenance Manual

B3
B2
B1
Figure 4: External bypass contactor
connection
PST 30...72
1L1 3L2 5L3
B1 B2 B3
M8
2T1 4T2 6T3
PST 85...142
1L1 3L2 5L3
B1 B2 B3
2T1 4T2 6T3
PST 175...300
1L1 3L2 5L3
B1 B2 B3
2T1 4T2 6T3
PSTB 370...470
1L1 3L2 5L3
M10
2T1 4T2 6T3
PSTB 570...1050
1L1 3L2 5L3
M12
2T1 4T2 6T3
Figure 5: Tightening torques and cable sizes.
Low Voltage Products & Systems
ABB Inc. • 888-385-1221 • www.abb-control.com
Chapter 5 - Connection

5:2.2.1 External Bypass contactor

An external by-pass contactor can be used for softstarter sizes PST30...300
(built in for PSTB370...1050).
Connect the contactor to terminals B1, B2 and B3 on the line side and terminals
2T1, 4T2 and 6T3 on the motor side.
The terminal markings are printed on the front label.
Do not use terminals B1, B2 or B3 for the "Inside Delta" connection. The
current measurement will be wrong.
4 mm (0.16")
6 Nm - 53 lb.in
M8
9 Nm - 80 lb.in
M8
18 Nm - 160 lb.in
40 Nm - 354 lb.in
45 Nm - 443 lb.in
Max. 22mm
Max. 24mm
(0.87")
(0.95")
Max. 8mm
(0.32")
Max. 30mm
Max. 32mm
(1.18")
(1.26")
Max. 10mm
(0.39")
Max. 47mm
Max. 45mm
(1.85")
(1.77")
Max. 10mm
(0.39")
Max. 52mm
Max. 50mm
(2.05")
(1.97")
Max. 10mm
(0.39")
2
1 x 6 ...... 70 mm
2
2 x 6 ...... 35 mm
AWG 1...8
2
1 x 6 ...... 70 mm
2
2 x 6 ...... 35 mm
14 mm
(0.56")
14
41
AC 1006.9 - 5/03