Fuses And Circuit Breakers - Danfoss VLT Refrigeration Drive FC 103 Design Manual

Specifications

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 Table 7.9 to Table 7.16 are suitable for use on a circuit capable of delivering 100000 A
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 Power [kW]
type
A2 1.1–2.2
A3 3.0–3.7
B3 5.5–11
B4 15–18
C3 22–30
C4 37–45
A4 1.1–2.2
A5 1.1–3.7
B1 5.5–11
B2 15
C1 18–30
C2 37–45
Table 7.9 200–240 V, Enclosure Types A, B, and C
MG16G202
Design Guide
Recommended Recommended
fuse size maximum fuse size
gG-10 (1.1–1.5)
gG-16 (2.2)
gG-16 (3)
gG-20 (3.7)
gG-25 (5.5–7.5)
gG-32 (11)
gG-50 (15)
gG-63 (18)
gG-80 (22) gG-150 (22)
aR-125 (30) aR-160 (30)
aR-160 (37) aR-200 (37)
aR-200 (45) aR-250 (45)
gG-10 (1.1–1.5)
gG-16 (2.2)
gG-10 (1.1–1.5)
gG-16 (2.2–3)
gG-20 (3.7)
gG-25 (5.5)
gG-32 (7.5–11)
gG-50
gG-63 (18.5) gG-160 (18.5–22)
gG-80 (22) aR-160 (30)
gG-100 (30)
aR-160 (37) aR-200 (37)
aR-200 (45) aR-250 (45)
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Recommended circuit
breaker (Moeller)
gG-25 PKZM0-25
gG-32 PKZM0-25
gG-63 PKZM4-50
gG-125 NZMB1-A100
NZMB2-A200
NZMB2-A250
gG-32 PKZM0-25
gG-32 PKZM0-25
gG-80 PKZM4-63
gG-100 NZMB1-A100
NZMB2-A200
NZMB2-A250
(symmetrical),
rms
Maximum trip level
[A]
25
25
50
100
150
250
25
25
63
100
160
250
127
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