Lenze EVF9333−xV - Manual (Page 62)

Installing of the standard device
Standard devices in the power range 15 ... 30 kW
Mounting in "cold plate" technique
4
4.2
4.2.4
l
4.2−4 EDSVF9333V EN 6.2−04/2012
4.2.4 Mounting in "cold plate" technique
)
Note!
All 9300 vector frequency inverters are approved according to
UL508C. To maintain the guaranteed features, controllers in
"cold plate" must be mounted by the user. For this reason, these
frequency inverters have the marking UR (instead of UL).
The drive controllers can be mounted in ˜cold plate˜ technique, e.g. on
collective coolers. For this purpose, the drive controllers of type EVF93xx−CV
must be used.
The following points are important for safe and reliable operation of the
controller:
ƒ Good thermal connection to the cooler
– The contact surface between the collective cooler and the controller
must be at least as large as the cooling plate of the controller.
– Plane contact surface, max. deviation 0.05 mm.
– When attaching the collective cooler to the controller, make sure to
use all specified screw connections.
ƒ Observe the thermal resistance R
th
given in the table. The values are
valid for controller operation under rated conditions.
9300 Cooling path
Power to be dissipated Heatsink − environment
Type P
v
[W] R
th
[K/W]
EVF9327−CV 410 0.085
EVF9328−CV 610 0.057
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.
Requirements for collective
coolers
Ambient conditions