7.8 Fuses and Circuit Breakers
Use recommended fuses and/or circuit breakers on the supply side as protection if there is component break-down inside
the frequency converter (first fault).
NOTICE
Use of fuses on the supply side is mandatory for IEC 60364 (CE) and NEC 2009 (UL) compliant installations.
Recommendations:
•
gG type fuses.
•
Moeller type circuit breakers. For other circuit breaker types, ensure that the energy into the frequency converter is
equal to or lower than the energy provided by Moeller types.
Use of recommended fuses and circuit breakers ensures that possible damage to the frequency converter is limited to
damages inside the unit. For further information, see
Application Note Fuses and Circuit Breakers
.
The fuses in
to
are suitable for use on a circuit capable of delivering 100000 A
rms
(symmetrical),
depending on the frequency converter voltage rating. With the proper fusing, the frequency converter short circuit current
rating (SCCR) is 100000 A
rms
.
7.8.1 CE Compliance
200–240 V
Enclosure
type
Power [kW]
Recommended
fuse size
Recommended
maximum fuse size
Recommended circuit
breaker (Moeller)
Maximum trip level
[A]
A2
1.1–2.2
gG-10 (1.1–1.5)
gG-16 (2.2)
gG-25
PKZM0-25
25
A3
3.0–3.7
gG-16 (3)
gG-20 (3.7)
gG-32
PKZM0-25
25
B3
5.5–11
gG-25 (5.5–7.5)
gG-32 (11)
gG-63
PKZM4-50
50
B4
15–18
gG-50 (15)
gG-63 (18)
gG-125
NZMB1-A100
100
C3
22–30
gG-80 (22)
aR-125 (30)
gG-150 (22)
aR-160 (30)
NZMB2-A200
150
C4
37–45
aR-160 (37)
aR-200 (45)
aR-200 (37)
aR-250 (45)
NZMB2-A250
250
A4
1.1–2.2
gG-10 (1.1–1.5)
gG-16 (2.2)
gG-32
PKZM0-25
25
A5
1.1–3.7
gG-10 (1.1–1.5)
gG-16 (2.2–3)
gG-20 (3.7)
gG-32
PKZM0-25
25
B1
5.5–11
gG-25 (5.5)
gG-32 (7.5–11)
gG-80
PKZM4-63
63
B2
15
gG-50
gG-100
NZMB1-A100
100
C1
18–30
gG-63 (18.5)
gG-80 (22)
gG-100 (30)
gG-160 (18.5–22)
aR-160 (30)
NZMB2-A200
160
C2
37–45
aR-160 (37)
aR-200 (45)
aR-200 (37)
aR-250 (45)
NZMB2-A250
250
Table 7.9 200–240 V, Enclosure Types A, B, and C
Specifications
Design Guide
MG16G202
Danfoss A/S © 08/2015 All rights reserved.
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