Fuses - Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual

Specifications
8.4.2 Derating for Altitude
The cooling capability of air is decreased at lower air
pressure.
Below 1,000 m altitude no derating is necessary but above
1,000 m the ambient temperature (T
current (I ) should be derated in accordance with
out
Illustration 8.6.
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 2,000 m is elaborated. At a temperature of 45
°C (T
- 3.3 K), 91% of the rated output current is
AMB, MAX
available. At a temperature of 41.7 °C, 100% of the rated
output current is available.
Altitude Derating
Derating of output current versus altitude at T
frame sizes D, E and F.
I (%)
OUT
100
95
90
85
80
0 500 1000 1500
Altitude (meters above sea level)*
Illustration 8.6 Altitude Derating

8.5 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
Protect personnel and property against the consequence
of component break-down internally in the frequency
converter.
MG21B202
Operating Instructions
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.
) or max. output
AMB
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.
Overcurrent protection
The frequency converter provides overload protection to
limit threats to human life, property damage and to avoid
for
AMB, MAX
fire hazard due to overheating of the cables in the instal-
lation. The frequency converter is equipped with an
internal overcurrent protection (4-18 Current Limit) that can
be used for upstream overload protection (UL-applications
excluded). Moreover, fuses or circuit breakers can be used
to provide the overcurrent protection in the installation.
Overcurrent protection must always be carried out
according to national regulations.
The following tables list the recommended rated current.
Recommended fuses are of the type gG for small to
medium power sizes. For larger powers, aR fuses are
recommended. Circuit breakers must be used, provided
they meet the national/international regulations and they
2000 2500 3000
limit the energy into the frequency converter to an equal
or lower level than the compliant circuit breakers.
If fuses/circuit breakers according to recommendations are
selected, possible damage on the frequency converter is
mainly limited to damage inside the unit.
Non UL compliance
If UL/cUL is not to be complied with, use the following
fuses, which ensure compliance with EN50178:
Danfoss A/S © Rev. 2014-01-22 All rights reserved.
P160-P250 380-480 V
P315-P450 380-480 V
Table 8.5 Fuse Types by Power Range
8 8
type gG
type gR
89