Fuses - Danfoss VLT AutomationDrive FC 302 Operating Instructions Manual

Specifications
Control card, USB serial communication
USB standard
USB plug
CAUTION
Connection to PC is carried out via a standard host/device USB cable.
The USB connection is galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
The USB connection is not galvanically isolated from protection earth (ground). Use only isolated laptop/PC as
connection to the USB connector on frequency converter or an isolated USB cable/converter.

8.7 Fuses

8.7.1 Fuse Selection
Use recommended fuses and/or circuit breakers on the supply side as protection in case of component break-down inside
the frequency converter (first fault).
NOTICE
Use of fuses on the supply side is mandatory for IEC 60364 (CE) and NEC 2009 (UL) compliant installations.
Use the recommended fuses to ensure compliance with EN50178. Use of recommended fuses and circuit breakers ensures
that possible damage to the frequency converter is limited to damages inside the unit. For further information, see
Application Note Fuses and Circuit Breakers.
The fuses below are suitable for use on a circuit capable of delivering 100000 A
frequency converter voltage rating. With the proper fusing, the frequency converter short-circuit current rating (SCCR) is
100000 A .
rms
N90K-N250 380–500 V
N55K-N315 525–690 V
Table 8.5 Recommended Fuses
Power Bussman Littelfuse PN Littelfuse
size PN
N90K 170M2619 LA50QS300-4 L50S-300
N110 170M2620 LA50QS350-4 L50S-350
N132 170M2621 LA50QS400-4 L50S-400
N160 170M4015 LA50QS500-4 L50S-500
N200 170M4016 LA50QS600-4 L50S-600
N250 170M4017 LA50QS800-4 L50S-800
Table 8.6 Fuse Options for 380–500 V Frequency Converters
MG34U402
Operating Instructions
type aR
type aR
Bussmann Siba PN
PN PN
FWH-300A 20 610
31.315
FWH-350A 20 610
31.350
FWH-400A 20 610
31.400
FWH-500A 20 610
31.550
FWH-600A 20 610
31.630
FWH-800A 20 610
31.800
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(symmetrical), depending on the
rms
Ferraz-Shawmut Ferraz-Shawmut PN
PN (Europe)
A50QS300-4 6,9URD31D08A0315
A50QS350-4 6,9URD31D08A0350
A50QS400-4 6,9URD31D08A0400
A50QS500-4 6,9URD31D08A0550
A50QS600-4 6,9URD31D08A0630
A50QS800-4 6,9URD32D08A0800
1.1 (full speed)
USB type B device plug
Ferraz-Shawmut PN
(North America)
A070URD31KI0315
A070URD31KI0350
A070URD31KI0400
A070URD31KI0550
A070URD31KI0630
A070URD31KI0800
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