Fuses And Circuit Breakers; Fuses - Danfoss VLT AutomationDrive FC 301 Design Manual

Electrical Installation
Illustration 9.27 Mains Connection Enclosures C3 (IP20).
9 9
122
®
VLT AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
Illustration 9.28 Mains Connection Enclosures C4 (IP20).

9.3.1 Fuses and Circuit Breakers

9.3.1.1 Fuses

It is recommended to use fuses and/or circuit breakers on
the supply side as protection in case of component break-
down inside the frequency converter (first fault).
NOTICE
Using fuses and/or circuit breakers on the supply side is
mandatory to ensure compliance with IEC 60364 for CE
or NEC 2009 for UL.
Branch Circuit Protection
To protect the installation against electrical and fire hazard,
all branch circuits in an installation, switch gear, machines
etc., must be protected against short-circuit and over-
current according to national/international regulations.
NOTICE
The recommendations given do not cover branch circuit
protection for UL.
Short-circuit protection
Danfoss recommends using the fuses/circuit breakers
mentioned below to protect service personnel and
property in case of component break-down in the
frequency converter.
MG33BF02 - Rev. 2013-12-20
U
V W