NORD Drivesystems BU0505 - Manual (Page 164)

SK 54xE – Users Manual for Frequency Inverters
164 BU 0505 GB-1013
7.3 General conditions for ColdPlate technology
The standard frequency inverter is supplied with a smooth flat mounting
surface instead of a heat sink. This means that the FI must be cooled via
the mounting surface, but has a low installation depth.
For all devices there is no fan.
In the selection of a suitable cooling system (e.g. liquid-cooled mounting
plate) the thermal resistance R
th
and the heat to be dissipated from the P
V
modulus of the frequency inverter must be taken into account. For
example, the supplier of the appropriate control cabinet system can
provide details for the correct selection of the mounting plate.
The mounting plate has been correctly selected if its R
th
value is less than
the values stated below.
NOTE:
Before the device is fitted to the mounting plate, any protective film must be removed. A suitable heat-
conducting paste must be used.
1~ 115V- devices P
v
modulus [W] Max. R
th
[K/W]
SK 5xxE-250-112-O-CP 8.51 3.29
SK 5xxE-370-112-O-CP 11.29 2.48
SK 5xxE-550-112-O-CP 15.98 1.75
SK 5xxE-750-112-O-CP 22.27 1.26
1/3~ 230V devices P
v
modulus [W] Max. R
th
[K/W]
SK 5xxE-250-323-A-CP 10.48 2.67
SK 5xxE-370-323-A-CP 14.11 1.98
SK 5xxE-550-323-A-CP 20.38 1.37
SK 5xxE-750-323-A-CP 29.09 0.96
SK 5xxE-111-323-A-CP 44.04 0.48
SK 5xxE-151-323-A-CP 55.08 0.38
SK 5xxE-221-323-A-CP * 67.96 0.31
SK 5xxE-301-323-A-CP 83.37 0.25
SK 5xxE-401-323-A-CP 113.88 0.18
*) NOTE: In contrast to the standard device, SK 500E-221-323-A-CP for S1 operation
can only be supplied in size 3.
Table 32: Technical data, ColdPlate 115V / 230V devices