CD Automation srl
STE Soft Starter
User’s Manual
15
4.6
Select Fuses
Caution:
USE
ONLY
EXTRARAPID
FUSE
WITH
APPROPRIATE
I²
T
Nominal Current
Fuse
3 In pick
3,5 In pick
4 In pick
4,5 In pick
Max Fuse I²T
(A²sec)
Qty
22A 19A 16A 14A 3800
3
34A 30A 26A 24A 3800
3
44A 38A 33A 30A 7350
3
75A 65A 58A 50A 9050
3
80A 70A 60A 52A 15300
3
130A 110A 95A 90A 69000
3
150A 140A 120A 110A 102500
3
165A 150A 130A 120A 188000
3
230A 200A 170A 150A 245000
3
450A 450A 450A 450A 1050000
3
500A 500A 500A 500A 1050000
3
For 6 wire connection, the Soft Start current is the same of winding current, to have the line current
multiply by 1,73
Caution:
The Fuses must have I²t 20% less than thyristor's I²t.
Caution:
High speed fuses are used only for the thyristor protection and can not be used to
protect the installation.
Caution:
The warranty of STE Soft Starter is null if no proper fuses are used. See tab.
Warning:
The user installation must be protected by electromagnetic circuit breaker or by
fuse isolator.
Summary of Contents for STE Series
Page 1: ...USER S MANUAL Rev 01 2007 STE Enhanced Soft Starter ...
Page 2: ......