Vacon NX, Руководство пользователя

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10
vacon • 168 Active front end (NXA)
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
10.7 Active front end - fuse selection
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.
The warranty becomes void if the drive is not equipped with
appropriate fuses.
Fuse information
The values in tables are based on max ambient temperature of +50 ºC.
Fuse sizes can differ in the same chassis. Make sure that the Isc of the supply transformer is high
enough to burn fuses fast enough.
Check the current rating of the fuse bases according to the input current of the drive.
The physical size of the fuse is chosen on the basis of the fuse current: Current < 250 amps (size 1
fuse), current > 250 amps (size 3 fuse).
The aR fuses are thermally rated into switch fuse in 50 degree ambient temperature.
The required AC fuse selection for the active front end unit can be found fromTable 66 and Table 67.
The required DC fuse selection for the active front end unit can be found from Table 38 and Table 39.
10.7.1 Fuse sizes, Active Front End units (AC supply)
Table 66. Fuse sizes for VACON
®
NX AFE units (380—500V)
Chassis Type
I
th
[A]
Fuse
size
DIN43620
‘TTF’ threaded
end
‘TTF’ threaded
end
Qty. of
fuses /
drive 3~
aR fuse part nr. aR fuse part nr. aR fuse part nr.
CH3 0016 16 DIN000 NH000UD69V40PV PC30UD69V50TF - 3
CH3 0022 22 DIN000 NH000UD69V40PV PC30UD69V50TF - 3
CH3 0031 31 DIN000 NH000UD69V63PV PC30UD69V63TF - 3
CH3 0038 38 DIN000 NH000UD69V100PV PC30UD69V100TF - 3
CH3 0045 45 DIN000 NH000UD69V100PV PC30UD69V100TF - 3
CH3 0061 61 DIN00 NH00UD69V125PV PC30UD69V125TF - 3
CH4 0072 72 DIN00 NH00UD69V200PV PC30UD69V200TF - 3
CH4 0087 87 DIN00 NH00UD69V200PV PC30UD69V200TF - 3
CH4 0105 105 DIN00 NH00UD69V200PV PC30UD69V200TF - 3
CH4 0140 140 DIN1 NH1UD69V315PV PC30UD69V315TF - 3
CH5 0168 168 DIN1 NH1UD69V315PV PC30UD69V315TF - 3
CH5 0205 205 DIN1 NH1UD69V400PV PC30UD69V400TF - 3
CH5 0261 261 DIN2 NH2UD69V500PV PC31UD69V500TF - 3
CH61 0300 300 DIN3 NH3UD69V630PV PC32UD69V630TF - 3
CH61 0385 385 DIN3 NH3UD69V630PV PC32UD69V630TF - 3
CH62 0460 460 DIN3 NH3UD69V1000PV PC33UD69V1000TF - 3
CH62 0520 520 DIN3 NH3UD69V1000PV PC33UD69V1000TF - 3
CH62 0590 590 DIN3 PC73UB69V1100PA PC33UD69V1100TF - 3