Danfoss VLT AutomationDrive FC 301

9.3.1.2 Recommendations
The tables in chapter 9.3.1 Fuses and Circuit Breakers list the
recommended rated current. Recommended fuses are of
the type gG for small to medium power sizes. For larger
power sizes, aR fuses are recommended. For circuit
breakers, Moeller types are recommended. Other types of
circuit breakers may be used, provided they limit the
energy into the frequency converter to a level equal to or
lower than the Moeller types.
If fuses/circuit breakers according to recommendations are
selected, possible damage on the frequency converter is
mainly limited to damages inside the unit.
For further information see Application Note Fuses and
Circuit Breakers, MN90T.
9.3.1.3
CE Compliance
Fuses or circuit breakers are mandatory to comply with IEC
60364. Danfoss recommend using a selection of the
following.
The fuses below are suitable for use on a circuit capable of
delivering 100,000 A
rms
(symmetrical), 240 V, 500 V, 600 V,
or 690 V depending on the frequency converter voltage
rating. With the proper fusing the frequency converter
short circuit current rating (SCCR) is 100,000 A
rms
.
The following UL listed fuses are suitable:
•
UL248-4 class CC fuses
•
UL248-8 class J fuses
•
UL248-12 class R fuses (RK1)
•
UL248-15 class T fuses
The following max. fuse size and type have been tested:
Enclosure Power [kW] Recommended
fuse size
Recommended
max. fuse
Recommended circuit
breaker
Moeller
Max trip level [A]
A1 0.25-1.5 gG-10 gG-25 PKZM0-10 10
A2 0.25-2.2 gG-10 (0.25-1.5)
gG-16 (2.2)
gG-25 PKZM0-16 16
A3 3.0-3.7 gG-16 (3)
gG-20 (3.7)
gG-32 PKZM0-25 25
A4 0.25-2.2 gG-10 (0.25-1.5)
gG-16 (2.2)
gG-32 PKZM0-25 25
A5 0.25-3.7 gG-10 (0.25-1.5)
gG-16 (2.2-3)
gG-20 (3.7)
gG-32 PKZM0-25 25
B1 5.5-7.5 gG-25 (5.5)
gG-32 (7.5)
gG-80 PKZM4-63 63
B2 11 gG-50 gG-100 NZMB1-A100 100
B3 5.5 gG-25 gG-63 PKZM4-50 50
B4 7.5-15 gG-32 (7.5)
gG-50 (11)
gG-63 (15)
gG-125 NZMB1-A100 100
C1 15-22 gG-63 (15)
gG-80 (18.5)
gG-100 (22)
gG-160 (15-18.5)
aR-160 (22)
NZMB2-A200 160
C2 30-37 aR-160 (30)
aR-200 (37)
aR-200 (30)
aR-250 (37)
NZMB2-A250 250
C3 18.5-22 gG-80 (18.5)
aR-125 (22)
gG-150 (18.5)
aR-160 (22)
NZMB2-A200 150
C4 30-37 aR-160 (30)
aR-200 (37)
aR-200 (30)
aR-250 (37)
NZMB2-A250 250
Table 9.3 200-240 V, Enclosure Types A, B and C
Electrical Installation
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
MG33BF02 - Rev. 2013-12-20 123
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