Active Front End Unit - Fuse Selection; Introduction - Vacon NX Active Front End User Manual

Active Front End (AFE)
4.11 Active Front End unit – Fuse selection
4.11.1

Introduction

AC fuses are used to protect the input network in case the Active Front End unit or the LCL filter is
faulty. DC fuses are used to protect the Active Front End unit and the LCL filter in case there is a
short circuit in the DC buses. If DC fuses are not used, short-circuit in the DC buses will cause a
loading of the Active Front End unit. Vacon Plc will not assume any responsibility for damages
caused by insufficient protection.
4.11.2 Fuses; mains voltage 380–500 V
4.11.2.1 AC fuses
Table 10. Ferraz Shawmut AC fuse selection, mains voltage 380–500 Vac
Module
Type Code
NXA_0261 5
AFE NXA_0460 5
NXA_1300 5
NOTE! Fuses for FI9 and FI10 are blade type and for FI13 flush-end type. If some other type is needed, please
contact Vacon.
Table 11. Bussman AC fuse selection, mains voltage 380–500 Vac
Module
Type Code
NXA_0261 5
AFE NXA_0460 5
NXA_1300 5
NOTE! All fuses are blade type. If some other type is needed, please contact Vacon.
24-hour support +358 (0)201 212 575 • Email: vacon@vacon.com
Ferraz Shawmut
Frame
type [aR]*
FI9 NH2UD69V500PV
FI10 NH3UD69V800PV
FI13 PC44UD75V22CTQ
Bussman
Frame
type [aR]*
FI9 170M6202
FI10 170M6277
FI13 170M6277
vacon • 35
AC fuses
U I
N N
Size
[V] [A]
690 500 2
690 800 3
750 2200 44
AC fuses
U I
N N
Size
[V] [A]
1250 500 3SHT
1250 1000 3SHT
1250 1000 3SHT
Q'ty
3
3
3
Q'ty
3
3
3x3
4