Specifications

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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

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

rms

(symmetrical), 480 V maximum.

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.

Circuit Breaker Fuse

UL Non UL UL Non UL

Bussmann Bussmann Bussmann Bussmann Max fuse

Power [kW] Type RK5 Type RK1 Type J Type T Type G

3x200-240 V IP20

0.25

FRS-R-10 KTN-R10 JKS-10 JJN-10 10

0.37 FRS-R-10 KTN-R10 JKS-10 JJN-10 10

0.75 FRS-R-10 KTN-R10 JKS-10 JJN-10 10

1.5 FRS-R-10 KTN-R10 JKS-10 JJN-10 10

2.2 FRS-R-15 KTN-R15 JKS-15 JJN-15 16

3.7 FRS-R-25 KTN-R25 JKS-25 JJN-25 25

5.5 FRS-R-50 KTN-R50 JKS-50 JJN-50 50

7.5 FRS-R-50 KTN-R50 JKS-50 JJN-50 50

11 FRS-R-80 KTN-R80 JKS-80 JJN-80 65

Cutler-Hammer

EGE3100FFG

Moeller NZMB1-

A125

FRS-R-100 KTN-R100 JKS-100 JJN-100 125

18.5 FRS-R-100 KTN-R100 JKS-100 JJN-100 125

Cutler-Hammer

JGE3150FFG

Moeller NZMB1-

A160

FRS-R-150 KTN-R150 JKS-150 JJN-150 160

30 FRS-R-150 KTN-R150 JKS-150 JJN-150 160

Cutler-Hammer

JGE3200FFG

Moeller NZMB1-

A200

FRS-R-200 KTN-R200 JKS-200 JJN-200 200

45 FRS-R-200 KTN-R200 JKS-200 JJN-200 200

Table 5.15 Circuit Breakers and Fuses

How to Install

VLT

HVAC Basic Drive FC 101 Design Guide

62 MG18C502 - Rev. 2013-09-06