3.5.12 External Fan Supply
In case the frequency converter is supplied by DC or if the
fan must run independently of the power supply, an
external power supply can be applied. The connection is
made on the power card.
Terminal No.
Function
100, 101
102, 103
Auxiliary supply S, T
Internal supply S, T
Table 3.24 External Fan Supply Terminals
The connector located on the power card provides the
connection of line voltage for the cooling fans. The fans
are connected from factory to be supplied from a common
AC line (jumpers between 100-102 and 101-103). If external
supply is needed, the jumpers are removed and the supply
is connected to terminals 100 and 101. Use a 5 A fuse for
protection. In UL applications, use a LittelFuse KLK-5 or
equivalent.
3.5.13 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
This is mandatory to ensure compliance with IEC 60364
for CE or NEC 2009 for UL.
WARNING
Personnel and property must be protected against the
consequence of component break-down internally in the
frequency converter.
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
overcurrent 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.
Non UL compliance
If UL/cUL is not to be complied with, Danfoss recommends
using the following fuses, which ensure compliance with
EN50178:
In case of malfunction, not following the recommendation
may result in unnecessary damage to the frequency
converter.
P90 - P200
380 - 500 V
type gG
P250 - P400
380 - 500 V
type gR
Table 3.25 Recommended EN 50178 Fuses
How to Install
VLT
®
Automation Drive FC 300 Operating Instructions
MG33U402 - Rev. 2013-12-16
57
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Summary of Contents for VLT AutomationDrive FC 302
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