Lenze 8400 - Manual (Page 129)

Mechanical installation
Standard devices in the power range 3 ... 22 kW
Mounting in ”cold plate” technique
5
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129 EDS84ASC552 EN 9.1
5.3.3 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.
– 0.03 K/W for controllers up to 5.5 kW
– 0.02 K/W for controllers up to 15 kW
– 0.01 K/W for controllers up to 22 kW.
Power to be dissipated Thermal resistance
Type P
v [W]
R
th
[K/W]
E84AVxxC3024xx0 115  0.33
E84AVxxC4024 155  0.25
E84AVxxC5524 215  0.18
E84AVxxC7524 250  0.15
E84AVxxC1134 355  0.11
E84AVxxC1534 390  0.10
E84AVxxC1834 460  0.057
E84AVxxC2234 540  0.057
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.