closure manufacturers offer software for performing the calcu-
lations (i.e. Rittal Therm software).
If the frequency converter is the only heat generating compo-
nent in the enclosure, the minimum airflow required at an am-
bient temperature of 45
°
C for the D3 and D4 frame drives is
391 m
3
/h (230 cfm). The minimum airflow required at an am-
bient temperature of 45
°
C for the E2 frame drive is 782 m
3
/h
(460 cfm).
NB!
Please see the
Top and Bottom Covers Only Instruc-
tion, 175R1106,
for further information.
Ordering information
Frame size D3 and D4: 176F1862
Frame size E2: 176F1861
3.4.5 Outside Installation/ NEMA 3R Kit for Rittal Enclosures
176FT261.10
This section is for the installation of NEMA 3R kits available for the
frequency converter frames D3, D4 and E2. These kits are designed
and tested to be used with IP00/ Chassis versions of these frames in
Rittal TS8 NEMA 3R or NEMA 4 enclosures. The NEMA-3R enclosure is
an outdoor enclosure that provides a degree of protection against rain
and ice. The NEMA-4 enclosure is an outdoor enclosure that provides a
greater degree of protection against weather and hosed water.
The minimum enclosure depth is 500 mm (600 mm for E2 frame) and
the kit is designed for a 600 mm (800 mm for E2 frame) wide enclo-
sure. Other enclosure widths are possible, however additional Rittal
hardware is required. The maximum depth and width are as required
by the installation.
NB!
The current rating of drives in D3 and D4 frames are
de-rated by 3%, when adding the NEMA 3R kit.
Drives in E2 frames require no derating.
NB!
A doorfan(s) is required on the enclosure to remove
the heat losses not contained in the backchannel of
the drive and any additional losses generated from
other components installed inside the enclosure. The
total required air flow must be calculated so that the
appropriate fans can be selected. Some enclosure
manufacturers offer software for performing the cal-
culations (i.e. Rittal Therm software). If the VLT is
the only heat generating component in the enclo-
sure, the minimum airflow required at an ambient
temperature of 45
°
C for the D3 and D4 drives is 391
m
3
/h (230 cfm). The minimum airflow required at an
ambient temperature of 45
°
C for the E2 drive is 782
m
3
/h (460 cfm).
Ordering information
Frame size D3: 176F4600
Frame size D4: 176F4601
Frame size E2: 176F1852
NB!
Please see the instructions
175R5922
for further in-
formation.
3.4.6 Outside Installation /NEMA 3R Kit of Industrial Enclosures
The kits are available for the frame sizes D3, D4 and E2. These kits are
designed and tested to be used with IP00/Chassis drives in welded box
construction enclosures with an environmental rating of NEMA-3R or
NEMA-4. The NEMA-3R enclosure is a dust tight, rain tight, ice resist-
ant, outdoor enclosure. The NEMA-4 enclosure is a dust tight and water
tight enclosure.
This kit has been tested and complies with UL environmental rating
Type-3R.
Note: The current rating of D3 and D4 frame drives are de-rated by 3%
when installed in a NEMA- 3R enclosure. E2 frame drives require no de-
rating when installed in a NEMA-3R enclosure.
3 Mechanical Installation
VLT HVAC Drive High Power Operating In-
structions
44
MG.11.F3.02 - VLT
®
is a registered Danfoss trademark
3