nord NORDAC PRO SK 500E Series - 7.4 General conditions for ColdPlate technology

SK 54xE – Users Manual for Frequency Inverters
186 BU 0505 EN-3021
7.4 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 Pv module [W] Max. Rth [K/W] Cooling area [m²]
1)
SK 5xxE-250-112-O-CP
12.0
2.33
0.12
SK 5xxE-250-112-O-CP
16.5
1.70
0.17
SK 5xxE-550-112-O-CP
23.9
1.17
0.24
SK 5xxE-750-112-O-CP
35.7
0.78
0.36
SK 5xxE-111-112-O-CP
53.5
0.39
0.54
1)
Required cooling area, determined under the following general conditions: Control cabinet, height approx. 2 m, ventilation by free
convection, mounting plate: Galvanised sheet steel, not painted, thickness approx. 3 mm.
Table 33: Technical data, ColdPlate 115V devices
230V - devices
Single phase operation
Pv module [W] Max. Rth [K/W] Cooling area [m²]
1)
SK 5xxE-250-323-A-CP
13.6
2.05
0.14
SK 5xxE-370-323-A-CP
18.5
1.52
0.19
SK 5xxE-550-323-A-CP
26.9
1.04
0.27
SK 5xxE-750-323-A-CP
38.8
0.72
0.39
SK 5xxE-111-323-A-CP
59.4
0.35
0.6
SK 5xxE-151-323-A-CP
72.1
0.29
0.73
SK 5xxE-221-323-A-CP
2)
87.9
0.24
0.88
1) Required cooling area, determined under the following general conditions: Control cabinet, height approx. 2 m, ventilation by free
convection, mounting plate: Galvanised sheet steel, not painted, thickness approx. 3 mm.
2)
In contrast to the standard device the SK 5xxE-221-323-A-CP is only available in size 3 for S1-operation.
Table 34: Technical data, ColdPlate 230V devices, single phase operation