Selection Of Dc Connection Fuses - ABB ACSM1 System Manual
System engineering manual
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Also See for ACSM1:
- Manual (510 pages) ,
- Firmware manual (448 pages) ,
- Hardware manual (112 pages)
Table of Contents
Selection of DC connection fuses
In the common DC system each DC connection must be equipped with
fuses. Fuses are needed in both branches (+ / -). Here are the general
guidelines for the selection of DC link fuses
•
AC fuse class aR (so called high speed fuses) should be used.
•
Fuse voltage rating should be 690 V
•
Fuse nominal current
where the average DC link current I
P
=
dc
I
dc
,
ave
U
•
P
dc,ave(i)
window) DC link power in the DC connection terminals of the
individual drive module.
•
U
is the actual DC link voltage
dc
The factor 1.6 covers the influence of cyclic load and ambient
conditions. If the average DC current I
power ratings of the drive module can be used. However the selected
fuse current rating and operation curve should be in line with the
used cable cross section to meet the regulations for the cable
protection.
The recommended fuse current ratings based of the DC power
ratings of drive modules are shown in the table below.
ACSM1-04xx-
Size
02A5-4
03A0-4
04A0-4
05A0-4
07A0-4
09A5-4
012A-4
016A-4
024A-4
031A-4
040A-4
046A-4
060A-4
073A-4
090A-4
≈ 6
I
1
.
F
N ,
,
ave
(
) i
dc
is the maximum average (during the 3 min time
Fuse
Frame
A
A
16
A
16
A
16
A
16
A
16
B
20
B
32
B
32
C
63
C
63
C
100
C
100
D
160
D
160
D
160
×
I
dc
,
ave
(
) i
can be defined with
dc,ave
≈ 35
U
1
.
dc
is not exactly known the
dc,ave
29
×
U
ac
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