Danfoss FC 302 - Fuses

FC 300 Instruction Manual
How to Install
" Fuses
Branch circuit protection:
In order to protect the install ation against electrical and fire hazard, all branch circuits
in an installation, switch gear, machines etc., m ust be short circuit- and overcurrent-
protected according to the national/international regulations.
Short circuit protection:
Theadjustablefrequencydrivemustbeprotectedagainst short circuit to avoid electrical or fire
hazard. Danfoss recommends using the fuses mentioned below to protect service personnel and
other equipment in case of an internal fa ilure in the drive. The adjustable frequency drive provides
full short circuit protection in case of a short circuit on the motor output.
Overcurrent protection:
Provide o verload protection to avoid fire hazard due to overheating of the cables in the instal
lation.
The adjustable frequency drive is equipped with an internal overcurrent protection that can b e used
for upstream overload prote ction (UL-applications excluded). See par. 4-18. Moreover, fuses or
circuit breakers can be used to provide the overcurrent protection in the installation. O
vercurrent
protection must always be carried out according to national regulations.
To comply with UL/cUL approvals, use pre- fuses according to the tables below.
200-240 V
FC 30X Bussmann Bussmann Bussmann SIBA L it tel fuse
Ferraz-
Shawmut
Ferraz-
Shawmut
Ty pe RK1 Type J Type T Type RK1 Type RK1 Type CC Type RK1
K2-K75 KTN-R10 JKS-10 JJN-10 5017906-010 KLN-R10 ATM-R10 A2K-10R
1K1-2K2 KTN-R20 JKS-20 JJN-20 5017906-020 KLN-R20 ATM-R20 A2K-20R
3K0-3K7 KTN-R30 JKS-30 JJN-30 5012406-032 KLN-R30 ATM-R30 A2K-30R
18
MG.33.A4.22 - VLT is a registered Danfoss trademark