Vacon NX series, User Manual

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Active Front End (AFE) vacon • 39
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
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 Ltd 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! All fuses are flush-end type. If some other type is needed, contact your distributor.
NOTE! Fuses for FI9 and FI10 are blade type and for FI13 flush-end type. If some other type is needed, contact
your distributor.
Table 13. Mersen AC fuse selection, mains voltage 380–500 Vac
Module AC fuses
Type Code
Enclosure
size
Mersen
type [aR]*
U
N
[V]
I
N
[A]
Size Q'ty
AFE
NXA_0168 5 FI9 PC32UD69V400TF 690 400 32 3
NXA_0205 5 FI9 PC32UD69V400TF 690 400 32 3
NXA_0261 5 FI9 PC32UD69V400TF 690 400 32 3
NXA_0385 5 FI10 PC33UD69V700TF 690 700 33 3
NXA_0460 5 FI10 PC33UD69V700TF 690 700 33 3
NXA_1150 5 FI13 PC44UD75V18CTQ 750 1800 44 3
NXA_1300 5 FI13 PC44UD75V18CTQ 750 1800 44 3
Table 14. Bussman AC fuse selection, mains voltage 380–500 Vac
Module AC fuses
Type Code
Enclosure
size
Bussman
type [aR]*
U
N
[V]
I
N
[A]
Size Q'ty
AFE
NXA_0168 5 FI9 170M8602 1000 400 3BKN/75 3
NXA_0205 5 FI9 170M8602 1000 400 3BKN/75 3
NXA_0261 5 FI9 170M8604 1000 500 3BKN/75 3
NXA_0385 5 FI10 170M8607 1000 700 3BKN/75 3
NXA_0460 5 FI10 170M8608 1000 800 3BKN/75 3
NXA_1150 5 FI13 170M7082 690 2000 4BKN/65 3
NXA_1300 5 FI13 170M7082 690 2000 4BKN/65 3