Fuses; Introduction; Ce Compliance - Danfoss VLT AutomationDrive FC 360 Quick Manual

Specifications

8.3 Fuses

8.3.1 Introduction

Use fuses and/or circuit breakers on the supply side to
protect service personnel and equipment from injuries and
damage in case of component breakdown inside the
frequency converter (first fault).
WARNING
Personnel and property must be protected in case of
internal component breakdown in the frequency
converter.
Branch circuit protection
All branch circuits in an installation, switch gear, machines
etc. must be protected against short circuit and
overcurrent according to national/international regulations.
NOTICE
The recommendations do not cover branch circuit
protection for UL.
Table 8.4 lists the recommended fuses that have been
tested.
If fuses are selected according to recommendations,
possible damages on the frequency converter can be
limited to inside the unit.
WARNING
Malfunction or failing to follow the recommendation
may result in personnel risk and damage to the
frequency converter and other equipment.

8.3.2 CE Compliance

NOTICE
Using fuses or circuit breakers is mandatory to ensure
compliance with IEC 60364 for CE.
Danfoss recommends using the fuses in Table 8.4 on a
circuit capable of delivering 100,000 A
380–480 V depending on the frequency converter voltage
rating. With the proper fusing, the frequency converter
short circuit current rating (SCCR) is 100,000 A
MG06A502
Quick Guide
Enclosure
Table 8.4 CE Fuse, 380–480 V, Enclosure Types J1–J7
(symmetrical),
rms
.
rms
Danfoss A/S © Rev. 06/2014 All rights reserved.
Power [kW]
type
0.37–1.1
J1 1.5
2.2
3.0
J2 4.0
5.5
J3 7.5
J4 11–15
18.5
J5
22
30
J6 37
45
55
J7
75
CE compliance fuse
gG-10
gG-25
gG-32
gG-50
gG-80
gG-125
aR-250
51
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