10.5 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) and NEC 2009
(UL) compliant installations.
D1h–D8h recommended fuses
Type aR fuses are recommended for enclosures D1h–D8h. See Table 10.9.
Model 380–480 V 525–690 V
N75K – ar-160
N90K – ar-315
N110K ar-315 ar-315
N132 ar-350 ar-315
N160 ar-400 ar-315
N200 ar-500 ar-550
N250 ar-630 ar-550
N315 ar-800 ar-550
N400 – ar-550
Table 10.9 D1h–D8h Power/semiconductor Fuse Sizes
Model Fuse Options
Bussman Littelfuse Littelfuse Bussmann Siba Ferraz-
Shawmut
Ferraz-Shawmut
(Europe)
Ferraz-Shawmut
(North America)
N110 170M2619 LA50QS300-4 L50S-300 FWH-300A 20 189 20.315 A50QS300-4 6,9URD31D08A0315 A070URD31KI0315
N132 170M2620 LA50QS350-4 L50S-350 FWH-350A 20 189 20.350 A50QS350-4 6,9URD31D08A0350 A070URD31KI0350
N160 170M2621 LA50QS400-4 L50S-400 FWH-400A 20 189 20.400 A50QS400-4 6,9URD31D08A0400 A070URD31KI0400
N200 170M4015 LA50QS500-4 L50S-500 FWH-500A 20 610 31.550 A50QS500-4 6,9URD31D08A0550 A070URD31KI0550
N250 170M4016 LA50QS600-4 L50S-600 FWH-600A 20 610 31.630 A50QS600-4 6,9URD31D08A0630 A070URD31KI0630
N315 170M4017 LA50QS800-4 L50S-800 FWH-800A 20 610 31.800 A50QS800-4 6,9URD32D08A0800 A070URD31KI0800
Table 10.10 D1h–D8h Power/semiconductor Fuse Options, 380–480 V
Model Bussmann Siba Ferraz-Shawmut European Ferraz-Shawmut North American
N75K 170M2616 20 610 31.160 6,9URD30D08A0160 A070URD30KI0160
N90K 170M2619 20 610 31.315 6,9URD31D08A0315 A070URD31KI0315
N110K 170M2619 20 610 31.315 6,9URD31D08A0315 A070URD31KI0315
N132 170M2619 20 610 31.315 6,9URD31D08A0315 A070URD31KI0315
N160 170M2619 20 610 31.315 6,9URD31D08A0315 A070URD31KI0315
N200 170M4015 20 620 31.550 6,9URD32D08A0550 A070URD32KI0550
N250 170M4015 20 620 31.550 6,9URD32D08A0550 A070URD32KI0550
N315 170M4015 20 620 31.550 6,9URD32D08A0550 A070URD32KI0550
N400 170M4015 20 620 31.550 6,9URD32D08A0550 A070URD32KI0550
Table 10.11 D1h–D8h Power/semiconductor Fuse Options, 525–690 V
Bussmann Rating
LPJ-21/2SP 2.5 A, 600 V
Table 10.12 D1h–D8h Space Heater Fuse Recommendation
If the drive is not supplied with a mains disconnect, contactor, or circuit breaker, the short circuit current rating (SCCR) of
the drives is 100000 A at all voltages (380–690 V).
If the drive is supplied with a mains disconnect, the SCCR of the drive is 100000 amps at all voltages (380–690 V).
If the drive is supplied with a circuit breaker, the SCCR depends on the voltage. See Table 10.13.
Electrical Installation Con... Design Guide
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