Overview - ABB PSR Manual

PST(B) – The advanced range

Overview

Softstarter. Type
Normal start
PST30
In-Line connected
(400 V) kW 15
IEC, Max. A 30
(440-480 V) hp 20
UL, Max FLA 28
400 V, 40 ºC
MCCB (50kA), type
Using MCCB only, type 1
coordination will be achieved.
Fuse protection (65kA), Semiconductor fuses, Bussmann, type
To achieve a type 2 coordina-
tion, semi-conductor fuses
170M1566
must be used.
Switch fuse, type
Suitable switch fuse for re-
commended semi-conductor
OS32GD03P
fuses.
Line contactor, type
The line contactor is not
required for the softstarter
itself but often used to
open if OL trips
Electronic overload relay
Overload protection is used
to protect the motor from
over heating
By-pass contactor, type
The by-pass contactor will
reduce the power loss of the
softstarter. All softstarters
can be operated without
by-pass
A50 ... A300 might be replaced by AF50 ... AF300.
The table above is an overview of possible combinations of devices.
Complete coordination tables are available at
38 Softstarters | 1SFC132005C0201, rev.F
PST30 ... PST72
PST37 PST44
18.5 22
37 44
25 30
34 42
170M1568
AF30 AF38
AF16 AF26
www.abb.com/lowvoltage
PST50 PST60
25 30
50 60
40 40
54 60
T2S160
170M1569 170M1570
OS63GD03P
A50 A63
Built-in
AF30 A40
PST85 ... PST142
PST72 PST85 PST105
37 45 55
72 85 105
50 60 75
68 80 104
170M1571 170M1572 170M3819
OS125GD03P OS250D03P OS400D03P
A75 A95
A50
PST142
75
142
100
130
T3S250
170M5809
A110 A145
A63 A95