TM 5-3895-374-24-1
Installation
ALTIVAR 37 to 90 kW
Speed controller
The ALTIVAR ATV-45 2 speed controller is forced air cooled.
ventilation
A fan is mounted on the upper part of the controller, and is protected
by a perforated cover, draws In the ambient air, which flows from top
to bottom, across the heatsink cooling fins which carry the power
components, and is expelled at the bottom When mounting the con-
troller, ensure that the air inlets and outlets are not obstructed
Fan characteristics
- flow rate 210 dm3/s (450 CFM),
- supply from the control voltage,
- controlled by the thermocontact fixed onto the heatsink
• which closes when the temperature reaches 50°C,
• which opens when the temperature falls to around 30°C
Thermal protection of the speed controller is ensured by another
thermocontact fixed onto the heatsink, which opens when the tempera-
ture reaches about 75°C
- the speed controller locks and the fault code O-hF appears on the
dialogue panel display,
- the ventilation continues operating if the control supply Is maintained,
enabling the controller to be rapidly cooled down
Mounting in a
Degree of protection IP23
general purpose
metal enclosure
In order to ensure adequate air flow inside
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
and damp proof metal
enclosure
Degree of protection IP54.
Provide a ventilating fan to circulate the air Inside the enclosure and prevent hot spots on the
speed controller See power dissipated by speed controllers (p 10 and 11)
(page 3-168)
