5.4 Fuses
5.4.1 Fuse Selection
To protect the drive system in case 1 or more internal
components break down within a drive module, use fuses
and/or circuit breakers at the mains supply side.
5.4.1.1 Branch Circuit Protection
To protect the installation against electrical and fire
hazards, protect all branch circuits in an installation against
short circuit and overcurrent according to national and
international regulations.
5.4.1.2 Short-circuit Protection
Danfoss recommends the fuses listed in
chapter 5.4.1.3 Recommended Fuses for CE Compliance
and
chapter 5.4.1.4 Recommended Fuses for UL Compliance
to
achieve CE or UL Compliance in the protection of service
personnel and property against the consequences of
component breakdown in the drive modules.
5.4.1.3 Recommended Fuses for CE
Compliance
Number of drive
modules
FC 302
FC 102/
FC 202
Recommended fuse
(maximum)
2
N450
N500
aR-1600
4
N500
N560
aR-2000
4
N560
N630
aR-2000
4
N630
N710
aR-2500
4
N710
N800
aR-2500
4
N800
N1M0
aR-2500
Table 5.1 6-Pulse Drive Systems (380–500 V AC)
Number of drive
modules
FC 302
FC 102/
FC 202
Recommended fuse
(maximum)
2
N250
N315
aR-630
2
N315
N355
aR-630
2
N355
N400
aR-630
2
N400
N450
aR-800
2
N450
N500
aR-800
4
N500
N560
aR-900
4
N560
N630
aR-900
4
N630
N710
aR-1600
4
N710
N800
aR-1600
4
N800
N1M0
aR-1600
Table 5.2 12-Pulse Drive Systems (380–500 V AC)
Number of drive
modules
FC 302
FC 102/
FC 202
Recommended fuse
(maximum)
4
N630
N710
aR-1600
4
N710
N800
aR-2000
4
N800
N900
aR-2500
4
N900
N1M0
aR-2500
4
N1M0
N1M2
aR-2500
Table 5.3 6-Pulse Drive Systems (525–690 V AC)
Number of drive
modules
FC 302
FC 102/
FC 202
Recommended fuse
(maximum)
2
N250
N315
aR-550
2
N315
N355
aR-630
2
N355
N400
aR-630
2
N400
N500
aR-630
2
N500
N560
aR-630
2
N560
N630
aR-900
4
N630
N710
aR-900
4
N710
N800
aR-900
4
N800
N900
aR-900
4
N900
N1M0
aR-1600
4
N1M0
N1M2
aR-1600
Table 5.4 12-Pulse Drive Systems (525–690 V AC)
5.4.1.4 Recommended Fuses for UL
Compliance
•
The drive modules are supplied with built-in AC
fuses. The modules have been qualified for
100 kA short-circuit current rating (SCCR) for the
standard busbar configurations at all voltages
(380–690 V AC).
•
If no power options or extra busbars are
connected externally, the drive system is qualified
for 100 kA SCCR with any Class L or Class T UL-
listed fuses connected at the input terminals of
the drive modules.
•
Do not exceed the listed fuse rating in
to
with the current rating of the Class L
or Class T fuses.
Number of drive
modules
FC 302
FC 102/
FC 202
Recommended fuse
(maximum)
2
N450
N500
1600 A
4
N500
N560
2000 A
4
N560
N630
2000 A
4
N630
N710
2500 A
4
N710
N800
2500 A
4
N800
N1M0
2500 A
Table 5.5 6-Pulse Drive Systems (380–500 V AC)
Electrical Installation
VLT
®
Parallel Drive Modules
22
Danfoss A/S © 08/2017 All rights reserved.
MG37K302
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