TM 5-3895-374-24-1
Installation
ALTIVAR 0,75 to 30 kW
Climatic
Temperature
environment
Humidity
see technical characteristics (p 12)
Altitude
Degree of protection
Pollution protect the speed controller against
-dust,
- corrosive gases,
- splashing liquids
Mounting precautions - Mount the speed controller vertically
- Do not locate near heat radiating elements
Mounting in general
Degree of protection IP23
purpose metal
In order to ensure adequate airflow inside
enclosure
the product
- leave sufficient space around the
controller
•d > 50 mm (2"),
•D > 100 mm (4"),
- provide ventilation louvres,
- check that the ventilation is sufficient, if
not, fit a cooling fan with filters
Mounting in a dust
Degree of protection IP54
-and damp proof
Provide a ventilating fan to circulate air inside the enclosure and prevent hot spots in the speed
metal enclosure
controller:
- flow 100 dm3/s (200 CFM), fan mounted beneath the speed controller
at a maximum distance of 50 mm (2")
This arrangement enables operation of the speed controller in an
enclosure with a maximum internal temperature of 60°C (140°F).
Other possibility use the optional ventilation kit (p 75).
Calculation of the enclosure size
Maximum thermal resistance Rth (°C/W)
Rth = 60 -0°e
0°e= maximum external temperature in °C,
P
P = total power dissipated min the enclosure in V
For the power dissipated by the controllers at rated load see characteristics p. 10 and 11.
Useful heat exchange surface area of the enclosure S (m2)
(sides + top + front for a wall mounted enclosure)
S=K
K = thermal resistance of the enclosure per m2
Rth
(K = 0,12 for a metal enclosure type DE2-HB)
Insulated enclosures should not be used, owing to their poor thermal conduction
(page 3-165)
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