Lenze 8200 Frequency inverters - Manual (Page 73)

Installation
8200SHB0199
4-16
4.1.5.3 Thermal performance of the system
The thermal conditions of a system are influenced by several factors. Take the
following into account for the selection of a control cabinet/system:
Ambient temperature of the controller
The rated data and the corresponding derating factors for higher temperatures are
still valid for the ambient temperature of the controller.
Heat generation inside control cabinets
In addition to the unit losses, which are to be dissipated via the external heat
sink, further losses must be taken into account:
-
Losses inside the controller
- These losses are generated by the electronics supply, fans, DC-bus
capacitors, etc.
-
Losses of the mains and motor components:
- You find detailed information about the losses of these components in
the corresponding technical data (Part 1) of the catalogs.
-
Heat radiation from the external cooler into the unit:
- This portion of the thermal energy depends, among others, on the type of
cooling unit and assembly.
- 821X-V003:
Lenze convection coolers dissipate approx. 65 % of the total power loss
of the controller via the cooler, approx. 35 % must be dissipated via the
control-cabinet cooling.
- 822X-V003/824X-V003:
No details at present.
Thermal distribution to common cooling units/in the control cabinet
If several components (controller, brake units, etc.) are mounted onto a
common cooler, it must be ensured that the cold plate temperature at the
controller does not exceed 75
E
C.
Measures:
-
821X-V003 with Lenze convection coolers
- Min. free space required for the convection coolers:
200 mm left and right / 500 mm top and bottom.
- Do not install one controller on top of the other.
- If necessary, use integral fans to avoid heat concentration inside the
control cabinet.
-
82XX-V003 with other coolers:
- No details at present, empirical testing required.
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