8.3 Fuses
Use fuses and/or circuit breakers on the supply side to
protect service personnel and equipment from injuries and
damage if there is component breakdown inside the
frequency converter (first fault).
Branch circuit protection
Protect all branch circuits in an installation, switchgear, and
machines against short circuit and overcurrent according
to national/international regulations.
NOTICE
The recommendations do not cover branch circuit
protection for UL.
lists the recommended fuses that have been
tested.
WARNING
PERSONAL INJURY AND EQUIPMENT DAMAGE RISK
Malfunction or failing to follow the recommendations
may result in personal risk and damage to the frequency
converter and other equipment.
•
Select fuses according to recommendations.
Possible damages can be limited to be inside
the frequency converter.
NOTICE
Using fuses or circuit breakers is mandatory to ensure
compliance with IEC 60364 for CE.
Danfoss recommends using the fuses in
on a
circuit capable of delivering 100000 A
rms
(symmetrical),
380–480 V depending on the frequency converter voltage
rating. With the proper fusing, the frequency converter
short circuit current rating (SCCR) is 100000 A
rms
.
Enclosure
size
Power [kW (hp)]
CE compliance fuse
J1
0.37–1.1 (0.5–1.5)
gG-10
1.5 (2)
2.2 (3)
J2
3.0 (4)
gG-25
4.0 (5.5)
5.5 (7.5)
J3
7.5 (10)
gG-32
J4
11–15 (15–20)
gG-50
J5
18.5 (25)
gG-80
22 (30)
J6
30 (40)
gG-125
37 (50)
45 (60)
J7
55 (75)
aR-250
75 (100)
Table 8.4 CE Fuse, 380–480 V, Enclosure Sizes J1–J7
Specifications
VLT
®
AutomationDrive FC 360
60
Danfoss A/S © 03/2017 All rights reserved.
MG06A702
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