Fuses - Danfoss VLT FC51 Design Manual

How to Install

6.6 Fuses

Branch circuit protection
To protect the installation against electrical and fire hazard,
all branch circuits in an installation, switch gear, machines
etc., must be short-circuited 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 or brake output.
FC 51
Bussmann
1X200-240 V
kW Type RK1
0K18-0K37 KTN-R15
0K75 KTN-R25
1K5 KTN-R35
2K2 KTN-R50
3x200-240 V
0K25 KTN-R10
0K37 KTN-R15
0K75 KTN-R20
1K5 KTN-R25
2K2 KTN-R40
3K7 KTN-R40
3x380-480 V
0K37-0K75 KTS-R10
1K5 KTS-R15
2K2 KTS-R20
3K0 KTS-R40
4K0 KTS-R40
5K5 KTS-R40
7K5 KTS-R40
11K0 KTS-R60
15K0 KTS-R60
18K5 KTS-R60
22K0 KTS-R60
Table 6.2 Fuses
®
VLT Micro Drive FC 51 Design Guide
Max. Fuses UL
Bussmann Bussmann
Type J Type T
JKS-15 JJN-15
JKS-25 JJN-25
JKS-35 JJN-35
JKS-50 JJN-50
JKS-10 JJN-10
JKS-15 JJN-15
JKS-20 JJN-20
JKS-25 JJN-25
JKS-40 JJN-40
JKS-40 JJN-40
JKS-10 JJS-10
JKS-15 JJS-15
JKS-20 JJS-20
JKS-40 JJS-40
JKS-40 JJS-40
JKS-40 JJS-40
JKS-40 JJS-40
JKS-60 JJS-60
JKS-60 JJS-60
JKS-60 JJS-60
JKS-60 JJS-60
MG02K302 - Rev. 2013-12-03
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 100,000 A
480 V maximum.
Non UL compliance
If UL/cUL is not to be complied with, Danfoss recommends
using the fuses mentioned in Table 6.2, which ensures
compliance with EN50178/IEC61800-5-1:
In case of malfunction, not following the fuse recommen-
dation may result in damage to the frequency converter
and the installation.
Ferraz-
Littel fuse
Shawmut
Type RK1 Type CC
KLN-R15 ATM-R15
KLN-R25 ATM-R25
KLN-R35 -
KLN-R50 -
KLN-R10 ATM-R10
KLN-R15 ATM-R15
KLN-R20 ATM-R20
KLN-R25 ATM-R25
KLN-R40 ATM-R40
KLN-R40 -
KLS-R10 ATM-R10
KLS-R15 ATM-R15
KLS-R20 ATM-R20
KLS-R40 ATM-R40
KLS-R40 ATM-R40
KLS-R40 -
KLS-R40 -
KLS-R60 -
KLS-R60 -
KLS-R60 -
KLS-R60 -
(symmetrical),
rms
Max. fuses non
Ferraz-
UL
Shawmut
Type RK1 Type gG
A2K-15R 16A
A2K-25R 25A
A2K-35R 35A
A2K-50R 50A
A2K-10R 10A
A2K-15R 16A
A2K-20R 20A
A2K-25R 25A
A2K-40R 40A
A2K-40R 40A
A6K-10R 10A
A2K-15R 16A
A6K-20R 20A
A6K-40R 40A
A6K-40R 40A
A6K-40R 40A
A6K-40R 40A
A6K-60R 63A
A6K-60R 63A
A6K-60R 80A
A6K-60R 80A
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