Danfoss VLT AQUA Drive FC 202

8.3.1 Derating for Altitude
The cooling capability of air is decreased at a lower air
pressure. Below 3,300 ft [1000 m] altitude no derating is
necessary but above 3,300 ft [1000 m] the ambient
temperature (T
AMB
) or max. output current (I
out
) should be
derated in accordance with Figure 8.10.
An alternative is to lower the ambient temperature at high
altitudes and thereby ensure 100% output current at high
altitudes. As an example of how to read the graph, the
situation at 6,600 ft [2 km] is elaborated. At a temperature
of 113°F [45°C] (T
AMB, MAX
- 3.3 K), 91% of the rated output
current is available. At a temperature of 107°F [41.7°C],
100% of the rated output current is available.
Altitude Derating
Derating of output current versus altitude at T
AMB, MAX
for
frame sizes D, E and F.
80
0 500
100
95
90
85
1000 1500 2000 2500 3000
Altitude (metres above sea level)*
130BB008.10
I
OUT
(%)
Figure 8.10 Altitude Derating
8.4 Fuses
Danfoss recommends using fuses and/or circuit breakers
on the supply side as protection in case of component
break-down inside the adjustable frequency drive (rst
fault).
NOTICE!
Using fuses and/or circuit breakers ensures compliance
with IEC 60364 for CE or NEC 2009 for UL.
Branch Circuit Protection
To protect the installation against electrical and re 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 do not cover branch circuit
protection for UL.
Short-circuit protection
Danfoss recommends using the fuses/circuit breakers in
chapter 8.4.2 Fuse Tables to protect service personnel and
property in case of component breakdown in the
adjustable frequency drive.
8.4.1 Non- UL compliance
Non- UL compliance
If UL/cUL is not to be complied with, Danfoss recommends
using the following fuses, which ensures compliance with
EN50178:
P160–P250 380–500 V type gG
P315–P450 380–500 V type gR
Table 8.5 Recommended Fuses for non-UL Applications
Specications Installation Manual
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