Fuses And Circuit Breakers - Danfoss FC 101 Design Manual

How to Install

5.2.3 Fuses and Circuit Breakers

Branch circuit protection
To protect the installation against electrical and fire hazard, all branch circuits in an installation, switch gear, machines etc.,
must be short-circuit and overcurrent protected according to national and local regulations.
Short circuit protection
Danfoss recommends using the fuses and circuit breakers listed in Table 5.15 to protect service personnel or other
equipment in case of an internal failure in the unit or short-circuit on DC-link. The frequency converter provides full short
circuit protection in case of a short-circuit on the motor.
Overcurrent protection
Provide overload protection to avoid overheating of the cables in the installation. Overcurrent protection must always be
5 5
carried out according to local and national regulations. Circuit breakers and fuses must be designed for protection in a
circuit capable of supplying a maximum of 100,000 A
UL/Non UL compliance
Use the circuit breakers or fuses listed in Table 5.15, to ensure compliance with UL or IEC 61800-5-1.
Circuit breakers must be designed for protection in a circuit capable of supplying a maximum of 10,000 Arms (symmetrical),
480 V maximum.
NOTICE
In the event of malfunction, failure to follow the protection recommendation may result in damage to the frequency
converter.
Power [kW]
3x200-240 V IP20
0.25
0.37
0.75
1.5
2.2
3.7
5.5
7.5
11
15
18.5
22
30
37
45
Table 5.15 Circuit Breakers and Fuses
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VLT HVAC Basic Drive FC 101 Design Guide
Circuit Breaker
UL Non UL
Cutler-Hammer Moeller NZMB1-
EGE3100FFG A125
Cutler-Hammer Moeller NZMB1-
JGE3150FFG A160
Cutler-Hammer Moeller NZMB1-
JGE3200FFG A200
MG18C502 - Rev. 2013-09-06
(symmetrical), 480 V maximum.
rms
Bussmann Bussmann
Type RK5 Type RK1
FRS-R-10 KTN-R10
FRS-R-10 KTN-R10
FRS-R-10 KTN-R10
FRS-R-10 KTN-R10
FRS-R-15 KTN-R15
FRS-R-25 KTN-R25
FRS-R-50 KTN-R50
FRS-R-50 KTN-R50
FRS-R-80 KTN-R80
FRS-R-100 KTN-R100
FRS-R-100 KTN-R100
FRS-R-150 KTN-R150
FRS-R-150 KTN-R150
FRS-R-200 KTN-R200
FRS-R-200 KTN-R200
Fuse
UL
Bussmann Bussmann
Type J Type T
JKS-10 JJN-10
JKS-10 JJN-10
JKS-10 JJN-10
JKS-10 JJN-10
JKS-15 JJN-15
JKS-25 JJN-25
JKS-50 JJN-50
JKS-50 JJN-50
JKS-80 JJN-80
JKS-100 JJN-100
JKS-100 JJN-100
JKS-150 JJN-150
JKS-150 JJN-150
JKS-200 JJN-200
JKS-200 JJN-200
Non UL
Max fuse
Type G
10
10
10
10
16
25
50
50
65
125
125
160
160
200
200