Vacon NX Active Front End, User Manual

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Active Front End (AFE) vacon • 35
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4
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
NOTE! Fuses for FI9 and FI10 are blade type and for FI13 flush-end type. If some other type is needed, please
contact Vacon.
NOTE! All fuses are blade type. If some other type is needed, please contact Vacon.
Table 10. Ferraz Shawmut AC fuse selection, mains voltage 380–500 Vac
Module AC fuses
Type Code Frame
Ferraz Shawmut
type [aR]*
U
N
[V]
I
N
[A]
Size Q'ty
AFE
NXA_0261 5 FI9 NH2UD69V500PV 690 500 2 3
NXA_0460 5 FI10 NH3UD69V800PV 690 800 3 3
NXA_1300 5 FI13 PC44UD75V22CTQ 750 2200 44 3
Table 11. Bussman AC fuse selection, mains voltage 380–500 Vac
Module AC fuses
Type Code Frame
Bussman
type [aR]*
U
N
[V]
I
N
[A]
Size Q'ty
AFE
NXA_0261 5 FI9 170M6202 1250 500 3SHT 3
NXA_0460 5 FI10 170M6277 1250 1000 3SHT 3
NXA_1300 5 FI13 170M6277 1250 1000 3SHT 3x3