7.5 Fuses and Circuit Breakers
Fuses ensure that possible damage to the drive is limited to damages inside the unit. To ensure compliance with EN 50178,
use the recommended fuses as replacements. Use of fuses on the supply side is mandatory for IEC 60364 (CE) compliant
installations.
J8–J9 recommended fuses
Type aR fuses are recommended for enclosures J8–J9. See Table 7.6.
Model 380–480 V
N90K ar-315
N110 ar-315
N132 ar-350
N160 ar-400
N200 ar-500
N250 ar-630
N315 ar-800
Table 7.6 J8–J9 Power/Semiconductor Fuse Sizes
Model Fuse Options
Bussman Littelfuse Littelfuse Bussmann Siba Ferraz-
Shawmut
Ferraz-Shawmut
(Europe)
N90K 170M2619 LA50QS300-4 L50S-300 FWH-300A 20 189 20.315 A50QS300-4 6,9URD31D08A0315
N110 170M2619 LA50QS300-4 L50S-300 FWH-300A 20 189 20.315 A50QS300-4 6,9URD31D08A0315
N132 170M2620 LA50QS350-4 L50S-350 FWH-350A 20 189 20.350 A50QS350-4 6,9URD31D08A0350
N160 170M2621 LA50QS400-4 L50S-400 FWH-400A 20 189 20.400 A50QS400-4 6,9URD31D08A0400
N200 170M4015 LA50QS500-4 L50S-500 FWH-500A 20 610 31.550 A50QS500-4 6,9URD31D08A0550
N250 170M4016 LA50QS600-4 L50S-600 FWH-600A 20 610 31.630 A50QS600-4 6,9URD31D08A0630
N315 170M4017 LA50QS800-4 L50S-800 FWH-800A 20 610 31.800 A50QS800-4 6,9URD32D08A0800
Table 7.7 J8–J9 Power/Semiconductor Fuse Options, 380–480 V
Bussmann Rating
LPJ-21/2SP 2.5 A, 600 V
Table 7.8 J8–J9 Space Heater Fuse Recommendation
NOTICE
DISCONNECT SWITCH
All units ordered and supplied with a factory-installed disconnect switch require Class L branch circuit fusing to meet
the 100 kA SCCR for the drive. If a circuit breaker is used, the SCCR rating is 42 kA. The input voltage and power rating
of the drive determine the specic Class L fuse. The input voltage and power rating are found on the product
nameplate. For more information regarding the nameplate, see chapter 6 Mechanical Installation Considerations.
Electrical Installation Con... VLT® AutomationDrive FC 361
44 Danfoss A/S © 03/2019 All rights reserved. MG06K102
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