3.4.2 Outside installation/ NEMA 3R kit for Rittal enclosures
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 enclosure. 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 Rittal cabinet to remove the loses not contained in the backchannel of the drive. The minimum doorfan(s)
airflow required at the drive maximum ambient for the D3 and D4 is 391 m^3/h (230 cfm). The minimum doorfan(s) airflow required
at the drive maximum ambient for the E2 is 782 m^3/h (460 cfm). If the ambient is below maximum or if additional components, heat
loses, are added within the enclosure a calculation must be made to ensure the proper airflow is provided to cool the inside of the
Rittal enclosure.
Ordering information
Frame size D3: 176F4600
Frame size D4: 176F4601
Frame size E2: 176F1852
Kit contents:
•
Ductwork components
•
Mounting hardware
•
16 mm, M5 torx screws for top vent cover
•
10 mm, M5 for attaching drive mounting plate to enclosure
•
M10 nuts to attach drive to mounting plate
•
Gasket material
Torque requirements:
1.
M5 screws/ nuts torque to 20 in-lbs (2.3 N-M)
2.
M6 screws/ nuts torque to 35 in-lbs (3.9 N-M)
3.
M10 nuts torque to 170 in-lbs (20 N-M)
4.
T25 Torx screws torque to 20 in-lbs (2.3 N-M)
3 How to Install
VLT AQUA High Power Operation Instructions
42
MG.20.P3.02 - VLT
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is a registered Danfoss trademark
3
