NOTICE
The current rating of frequency converters in enclosure
types D3 and D4 are de-rated by 3%, when adding the
NEMA 3R kit. Frequency converters in enclosure type E2
require no derating.
NOTICE
A doorfan(s) is required on the enclosure to remove the
heat losses not contained in the backchannel of the
frequency converter and any additional losses generated
from other components installed inside the enclosure.
The total required airflow must be calculated so that the
appropriate fans can be selected. Some enclosure
manufacturers offer software for performing the
calculations (i.e. Rittal Therm software). If the frequency
converter is the only heat generating component in the
enclosure, the minimum airflow required at an ambient
temperature of 45 °C for the D3 and D4 frequency
converters is 391 m
3
/h (230 cfm). The minimum airflow
required at an ambient temperature of 45 °C for the E2
frequency converter is 782 m
3
/h (460 cfm).
Ordering information
Enclosure type D3: 176F4600
Enclosure type D4: 176F4601
Enclosure type E2: 176F1852
NOTICE
See the instructions Installation of NEMA 3R Kit for IP00
Frames D3, D4 & E2 for further information.
3.4.3 Installation on Pedestal
This section describes the installation of a pedestal unit
available for the frequency converters enclosure types D1
and D2. This is a 200 mm high pedestal that allows these
enclosure types to be floor mounted. The front of the
pedestal has openings for input air to the power
components.
The frequency converter gland plate must be installed to
provide adequate cooling air to the control components of
the frequency converter via the door fan and to maintain
the IP21/NEMA 1 or IP54/NEMA 12 degrees of enclosure
protections.
Illustration 3.51 Frequency Converter on Pedestal
There is one pedestal that fits both enclosure types D1 and
D2. Its ordering number is 176F1827. The pedestal is
standard for enclosure type E1.
How to Install VLT AQUA Drive FC 202 Operation Instructions
MG20P402 - Rev. 2013-12-16 39
3 3
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