Danfoss FC 300 Design Guide

FC 300 Design Guide
How to Install
" Fuses
Branch circuit protection:
In order to protect the installation against electrical and fire hazard, all b ranch circuits
in an installation, sw itch gear, m achines, etc., must be short-circuit and overc ur rent-
protected according to national/internati onal regulations.
Short circuit protection:
The adjustable frequency drive must be protected against short-circuit to avoid e lectrical or fire
hazard. Danfoss recommends using the fuses mentioned below to protect service personnel or
other equipment in case of an internal failure in the drive. The adjusta ble frequency drive provides
full short-circuit p rotect ion in case of a short-circuit on the motor output.
Overcurrent protection:
Provide overload prote ction to avoid fire hazard due to overheating of the cables in the instal
lation.
The adjustable frequency drive is equipped with internal overcurrent protect ion that can be used
for upstream overload protection (UL applications excluded). See par. 4-18. Moreover, fuses
or circuit b reakers can be used to provide overcurrent protection in the installation. Ov
ercurrent
protection must always be provided according to national regulations.
Fuses must be designed for protection in a circuit capable of supplying a maximum of
100,000 A
rms
(symmetrical), 500 V maximum.
Non-UL compliance
If UL/cU L is not to b e complied with, we
recommend using the following fuses
, which w ill
ensure compliance w ith E N50178:
In case of malfunction, not following the
recommendation may result in unnec
essary damage
to the adjustable frequen cy drive.
FC 30X Max. fuse size Voltage Type
K25-K75 10A
1)
200-240 V type gG
1K1-2K2 20A
1)
200-240 V type gG
3K0-3K7 32A
1)
200-240 V type gG
K37-1K5 10A
1)
380-500 V type gG
2K2-4K0 20A
1)
380-500 V type gG
5K5-7K5 32A
1)
380-500 V type gG
11K 63A
1)
380-500 V type gG
15K 63A
1)
380-500 V type gG
18K 63A
1)
380-500 V type gG
22K 80A
1)
380-500 V type gG
1) Max. fuses - see national/international
regulations for selecting an applicable fuse s ize.
UL Compliance
200-240 V
FC 30X Bussmann Bus smann Buss mann SIBA Littel fuse
Ferraz-
Shawmut
Ferraz-
Shawmut
kW Type RK1 Type J Type T Type RK1 Type RK1 Type CC Type RK1
2-7.5 KTN-R10 JKS-10 JJN-10 5017906-010 KLN-R10 ATM-R10 A2K-10R
1.1-2.2 KTN-R20 JKS-20 JJN-20 5017906-020 KLN-R20 ATM-R20 A2K-20R
3.0-3.7 KTN-R30 JKS-30 JJN-30 5012406-032 KLN-R30 ATM-R30 A2K-30R
103
MG.33.B6.22 - VLT is a registered Danfoss trademark

Danfoss FC 300 Specifications

General

Brand	Danfoss
Model	FC 300
Category	DC Drives
Language	English