Danfoss VLT 2800 Operations Instructions download pdf (Page 16)

1.4.13 Fuses

Branch circuit protection:

In order to protect the installation against electrical and fire hazard, all branch circuits in an in-

stallation, switch gear, machines etc., must be short-circuited and overcurrent protected according

to national/international regulations.

Short circuit protection:

Danfoss recommends using the fuses mentioned in the following table to protect service personnel

or other equipment in case of an internal failure in the unit or short-circuit on DC-link. The fre-

quency converter provides full short circuit protection in case of a short-circuit on the motor or

brake output.

Overcurrent protection:

Provide overload protection to avoid overheating of the cables in the installation. Overcurrent

protection must always be carried out according to national regulations. Fuses must be designed

for protection in a circuit capable of supplying a maximum of 100,000 A

rms

(symmetrical), 480 V

maximum.

Non UL compliance:

If UL/cUL is not to be complied with, Danfoss recommends using the fuses mentioned in the below

table, which will ensure compliance with EN50178/IEC61800-5-1:

In case of malfunction, not following the fuse recommendation may result in damage to the fre-

quency converter.

VLT 2800 Quick Guide 1 Quick Guide

MG.28.M1.02 - VLT

is a registered Danfoss trademark

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: [email protected]

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Danfoss VLT 2800 Operations Instructions Page 16