Lenze 8400 - Manual (Page 148)

Mechanical installation
Standard devices in a power range of 30 ... 45 kW
Mounting in ”cold plate” technique
5
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148 EDS84ASC552 EN 9.1
5.4.2 Mounting in ”cold plate” technique
The E84AVxxC... controllers are designed for assembly on coolers (e.g. collective coolers) in
”cold-plate” technique.
Requirements for collective coolers
A good thermal connection to the cooler is important for the trouble-free operation of
the controller:
ƒ The contact area between the collective cooler and the controller
– must be at least as big as the cooling plate of the controller.
– must be smooth, the maximum deviation must not exceed 0.05 mm.
ƒ The collective cooler must be connected to the controller with all required screwed
joints.
ƒ The thermal resistance R
th
must be observed, see table.
The values in the table apply to the operation of the controllers under rated
conditions.
The values include the heat transmission between the cooler and the device.
With a standard heat conducting paste and a film thickness of 50 m, the heat
transmission is approx. 0.007 K/W.
Power to be dissipated Thermal resistance
Type P
v [W]
R
th
[K/W]
E84AVxxC3034 720  0.053
E84AVxxC3734 810  0.047
E84AVxxC4534 1080  0.035
Ambient conditions
ƒ The rated data and the derating factors at increased temperature also apply to the
ambient temperature of the drive controllers.
ƒ Temperature at the cooling plate of the drive controller: max. 75 °C.
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Note!
Apply standard heat-conducting paste or heat-conducting foil onto cooler and
cooling plate before you bolt the controller onto the cooler.