Fuses And Circuit Breakers - Danfoss VLT 380-500 V Design Manual

Considerations During Insta...

8.4 Fuses and Circuit Breakers

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.
8.4.1.1 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.
8.4.1.2 Short-circuit Protection
Danfoss recommends the fuses listed in chapter 8.4.1.3 Recommended Fuses for CE Compliance and
chapter 8.4.1.4 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.
8.4.1.3 Recommended Fuses for CE Compliance
Number of drive FC 302 FC 102/
modules
2 N450
4 N500
4 N560
4 N630
4 N710
4 N800
Table 8.3 6-Pulse Drive Systems (380–500 V AC)
Number of drive FC 302 FC 102/
modules
2 N250
2 N315
2 N355
2 N400
2 N450
4 N500
4 N560
4 N630
4 N710
4 N800
Table 8.4 12-Pulse Drive Systems (380–500 V AC)
MG37N102
Design Guide
Recommended fuse
FC 202 (maximum)
N500 aR-1600
N560 aR-2000
N630 aR-2000
N710 aR-2500
N800 aR-2500
N1M0 aR-2500
Recommended fuse
FC 202 (maximum)
N315 aR-630
N355 aR-630
N400 aR-630
N450 aR-800
N500 aR-800
N560 aR-900
N630 aR-900
N710 aR-1600
N800 aR-1600
N1M0 aR-1600
Danfoss A/S © 6/2016 All rights reserved.
Number of drive FC 302 FC 102/
modules FC 202
4 N630 N710
4 N710 N800
4 N800 N900
4 N900 N1M0
4 N1M0 N1M2
Table 8.5 6-Pulse Drive Systems (525–690 V AC)
Number of drive FC 302 FC 102/
modules FC 202
2 N250 N315
2 N315 N355
2 N355 N400
2 N400 N500
2 N500 N560
2 N560 N630
4 N630 N710
4 N710 N800
4 N800 N900
4 N900 N1M0
4 N1M0 N1M2
Table 8.6 12-Pulse Drive Systems (525–690 V AC)
Recommended fuse
(maximum)
8
aR-1600
aR-2000
aR-2500
aR-2500
aR-2500
Recommended fuse
(maximum)
aR-550
aR-630
aR-630
aR-630
aR-630
aR-900
aR-900
aR-900
aR-900
aR-1600
aR-1600
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