Danfoss VLT 380-500 V, Design Manual

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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
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 8.3 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 8.4 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 8.5 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 8.6 12-Pulse Drive Systems (525–690 V AC)
Considerations During Insta... Design Guide
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