
1SFC132005C0201, rev.F | Softstarters 39
PST(B) – The advanced range
Overview
PST175 ... PST300
PSTB370 ... PSTB470
PSTB570 ... PSTB1050
Softstarter. Type
Normal start
In-Line connected
PST175
PST210
PST250
PST300
PSTB370
PSTB470
PSTB570 PSTB720
PSTB840
PSTB1050
(400 V) kW
90
110
132
160
200
250
315
400
450
560
IEC, Max. A
175
210
250
300
370
470
570
720
840
1050
(440-480 V) hp
125
150
200
250
300
400
500
600
700
900
UL, Max FLA
156
192
248
302
361
480
590
720
840
1062
400 V, 40 ºC
Using MCCB only, type 1
coordination will be achieved.
MCCB (50kA), type
T4S250
T5S400
T5S630
T6S630
T6S800
T7S1250
T7S1600
To achieve a type 2 coordina-
tion, semi-conductor fuses
must be used.
Fuse protection (65kA), Semiconductor fuses, Bussmann, type
170M5810 170M5812 170M5813 170M6813
170M5813
170M6813
170M8554
170M6018 170M6020
2)
Suitable switch fuse for re-
commended semi-conductor
fuses.
Switch fuse, type
OS400D03P
OS630D03P OS400D03P
OS630D03P
OS800D03P
1)
The line contactor is not
required for the softstarter
itself but often used to
open if OL trips
Line contactor, type
A185
A210
A260
A300
AF400
AF580
AF750
AF1350
AF1650
Overload protection is used
to protect the motor from
over heating
Electronic overload relay, type
Built-in
The by-pass contactor will
reduce the power loss of the
softstarter. All softstarters
can be operated without
by-pass
By-pass contactor, type
A145
A210
Built-in
1) Switch fuse not available. Use Bussmann fuse base 170H3004
2) PSTB1050-690-70 has 170M6019
Quick guide for selection
Normal start Class 10
Heavy duty start class 30
Ordering - see page 40 - 41
Ordering - see page 42 - 43
Typical applications
• Bow thruster • Centrifugal pump
• Centrifugal fan
• Conveyor belt (long)
• Compressor
• Conveyor belt (short)
• Crusher
• Mill
• Elevator
• Escalator
• Mixer
• Stirrer
If more than 10 starts/h
!
Select one size larger than the standard selection
How to select correct size
By using the guide here, you can quickly
select a suitable softstarter for the most
common applications.
If a more precise selection is required,
you can use the softstarter selection tool
available at
www.abb.com/lowvoltage