Danfoss D9h, Руководство по эксплуатации

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5.9 Installing Upstream Fuses
5.9.1 Upstream Fuse Considerations
Factory fuse options like a fusible disconnector or MCCB protect the busbars and circuits within the drive. To protect the cables, an
installer should use separate F1 fuses for upstream protection.
Danfoss recommends the fuse type gG (IEC 60269-1) for the mains fuses. Use only fuses with a sufficient voltage rating accord-
ing to the mains voltage. Do not use larger fuses than what is recommended. These fuses are selected for short-circuit protec-
tion only.
Operation time of the fuse must be less than 0.4 s. The operation time must also agree with the fuse type and the impedance of
the supply circuit.
The recommended mains cable and fuse sizes are valid up to a cable length of 100 m (328 ft), with mains having a short-circuit
current of 20 kA. Recommended cable sizes are shown in the
Electrical Data section.
Danfoss recommends the use of FC1 fuses to meet short-circuit protection for any enclosed drives supplied with only the non-
fusible disconnect, a non-fusible disconnect and contactor, or a contactor only option.
5.9.2 Recommended Fuse Ratings for IEC Installation
Table 69: Recommended Fuse Ratings for IEC Installation, 380–500 V
Model Fuse P/N Fuse size Rated cur-
rent [A]
Minimum pro-
spective SC cur-
rent of the grid
[kA] Maximum fuse
rating F1 [A] Minimum
voltage rating
[V] Type F1
N90K Mersen NH1GG50V250 1 250 6.8 250 500 gG/gL
N110 Mersen NH2GG50V315 2 315 7 315 500 gG/gL
N132 Mersen NH2GG50V355 2 355 8.5 355 500 gG/gL
N160 Mersen NH3GG50V425 3 425 10 425 500 gG/gL
N200 Mersen NH3AGG50V630 3 630 13 630 500 gG/gL
N250 Mersen NH3AGG50V630 3 630 13 630 500 gG/gL
N315 Mersen NH4GG50V800 4 800 18 800 500 gG/gL
N355 Mersen NH4GG50V1000 4 1000 25 1000 500 gG/gL
N400 Mersen NH4GG50V1000 4 1000 25 1000 500 gG/gL
N450 Mersen NH4GG50V1000 4 1000 25 1000 500 gG/gL
N500 Mersen NH4GG50V1250 4 1250 33 1250 500 gG/gL
Table 70: Recommended Fuse Ratings for IEC Installation, 525–690 V
Model Fuse P/N Fuse size Rated cur-
rent [A]
Minimum pro-
spective SC cur-
rent of the grid
[kA] Maximum fuse
rating F1 [A] Minimum volt-
age rating [V] Type F1
N90K Mersen NH2GG69V250 2 250 6.5 250 690 gG/gL
N110 Mersen NH2GG69V250 2 250 6.5 250 690 gG/gL
N132 Mersen NH2GG69V250 2 250 6.5 250 690 gG/gL
N160 Mersen NH2GG69V315 2 315 7.5 315 690 gG/gL
N200 Mersen NH3GG69V355 3 355 8.5 355 690 gG/gL
AQ262139143212en-000301 / 130R0879 108 | Danfoss A/S © 2021.10
Electrical Installation
VLT® AutomationDrive FC 302
Operating Guide