Danfoss VLT HVAC Basic Drive FC 10, Quick Manual, Page: 7 / 33

IP20 380-480V 90kW
13
0B
B7
64
.1
0
1
2
3
4
98
97
96
99
95
93
92
91
L1
L1
L1
U
V
w
1 Line
2 Relays
3 Earth
4 Motor
1.3.6 Fuses
Branch circuit protection:
In order to protect the installation against electrical and fire
hazard, all branch circuits in an installation, switch gear,
machines etc., must be short-circuit and overcurrent
protected according to national/international regulations.
Short circuit protection:
Danfoss recommends using the fuses mentioned in the
following tables to protect service personnel or other
equipment in case of an internal failure in the unit or short-
circuit on DC-link. The frequency converter provides full
short circuit protection in case of a short-circuit on the
motor.
Overcurrent protection:
Provide overload protection to avoid overheating of the
cables in the installation. Overcurrent protection must
always be carried out according to national regulations.
Fuses must be designed for protection in a circuit capable of
supplying a maximum of 100,000A
rms
(symmetrical), 480V
maximum.
Non UL compliance:
If UL/cUL is not to be complied with, Danfoss recommends
using the fuses mentioned in the below table, which will
ensure compliance with IEC61800-5-1:
In case of malfunction, not following the fuse recommen-
dation may result in damage to the frequency converter.
UL Non
UL
Bussmann Bussmann Bussmann Bussmann Max.
Fuse
Power
kW Type RK5 Type RK1 Type J Type T Type
gG
3 x 200-240V
0.25 FRS-R-10 KTN-R10 JKS-10 JJN-10 10
0.37 FRS-R-10 KTN-R10 JKS-10 JJN-10 10
0.75 FRS-R-10 KTN-R10 JKS-10 JJN-10 10
1.5 FRS-R-10 KTN-R10 JKS-10 JJN-10 10
2.2 FRS-R-15 KTN-R15 JKS-15 JJN-15 16
3.7 FRS-R-25 KTN-R25 JKS-25 JJN-25 25
5.5 FRS-R-50 KTN-R50 JKS-50 JJN-50 50
7.5 FRS-R-50 KTN-R50 JKS-50 JJN-50 50
11 FRS-R-80 KTN-R80 JKS-80 JJN-80 65
3 x 380-480V
0.37 FRS-R-10 KTS-R10 JKS-10 JJS-10 10
0.75 FRS-R-10 KTS-R10 JKS-10 JJS-10 10
1.5 FRS-R-10 KTS-R10 JKS-10 JJS-10 10
2.2 FRS-R-15 KTS-R15 JKS-15 JJS-15 15
3 FRS-R-15 KTS-R15 JKS-15 JJS-15 15
4 FRS-R-15 KTS-R15 JKS-15 JJS-15 15
5.5 FRS-R-25 KTS-R25 JKS-25 JJS-25 25
7.5 FRS-R-25 KTS-R25 JKS-25 JJS-25 25
11 FRS-R-50 KTS-R50 JKS-50 JJS-50 50
15 FRS-R-50 KTS-R50 JKS-50 JJS-50 50
18.5 FRS-R-80 KTS-R80 JKS-80 JJS-80 65
22 FRS-R-80 KTS-R80 JKS-80 JJS-80 65
30 FRS-R-80 KTS-R80 JKS-R80 JJS-R80 80
37 FRS-R-100 KTS-R100 JKS-R100 JJS-R100 100
45 FRS-R-125 KTS-R125 JKS-R125 JJS-R125 125
55 FRS-R-150 KTS-R150 JKS-R150 JJS-R150 150
75 FRS-R-200 KTS-R200 JKS-R200 JJS-R200 200
90 FRS-R-250 KTS-R250 JKS-R250 JJS-R250 250
Quick Guide VLT HVAC Basic Drive FC 101 Quick Guide
6 MG.18.A1.02 - VLT
®
is a registered Danfoss trademark
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