Danfoss VLT AutomationDrive FC 302, Руководство по установке

Страница: 104 / 128

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 8.14 .
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 8.14 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 (first
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 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 do not cover branch circuit
protection for UL.
Short-circuit protection
Danfoss recommends using the fuses/circuit breakers in 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:
P132–P200 380–500 V type gG
P250–P400 380–500 V type gR
Table 8.5 Recommended Fuses for non-UL Applications
Specifications
VLT
®
AutomationDrive FC 302 Low Harmonic Drive
132–630 kW
102 Danfoss A/S © Rev. 04/2015 All rights reserved. MG37A322
8 8