Overview - ABB PSR Manual

PSS – The flexible range

Overview

Normal start
In-line connected
(400 V) kW
IEC, Max. A
(440-480 V) hp
UL, Max FLA
Using MCCB type 1
coordination will be
achieved
To achieve type 2 coordina-
tion semi-conductor fuses
must be used
Suitable switch fuse for
the recommended semi-
conductor fuses
Overload protection is used
to protect the motor from
over heating
The line contactor is not
required for the softstarter
itself but often used to
open if OL trips
The by-pass contactor will
reduce the power loss of
the softstarter. All softstar-
ters can be operated
without by-pass
Must be used if current limit
function is required
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
16 Softstarters | 1SFC132005C0201, rev.F
PSS18/30...PSS44/76
Softstarter. Type
PSS18/30 PSS30/52
7.5 15
18 30
10 20
18 28
400 V, 40º C
MCCB (50kA), type
Fuse protection (65kA), Semi-conductor fuses, Bussmann, type
170M1564 170M1566
Switch fuse, type
OS32GD03P
Thermal overload relay, type
TF42DU
Line contactor, type
AF16 AF30
By-pass contactor, type
AF9 AF16
Current transformers, type
PSCT-30 PSCT-40
1 turn 1 turn
www.abb.com/lowvoltage
PSS37/64 PSS44/76
18.5 22
37 44
25 30
34 40
T2S160
170M1568 170M1569
OS63GD03P
AF38
AF26
PSCT-50 PSCT-60
1 turn 1 turn
PSS50/85...PSS72/124
PSS50/85 PSS60/105
25 30
50 60
30 40
47 56
170M1570
TA75DU
A50 A63
AF30 A40
PSCT-75
1 turn
PSS72/124
37
72
50
67
170M1571
OS125GD03P
A75
A50
PSCT-100
1 turn