ABB DSSA165 48990001-LY control module

Determining power dissipation

⇒ See the motor documentation for the continuous current at standstill IdN (see "MKD Digital AC Motors"- Project Planning -). 

⇒ Using the IdN value of the motor selected, find the value in the diagram in Fig. 10-1 for the power dissipation PV, DKC. 

⇒ Convert the continuous regenerative power found in Tab. Fig. 3-2 with the factor 0.8. as bleeder-dependent power dissipation PV, Bleeder in the DKC. 

⇒ Add both dissipation values (PV,DKC and PV,Bleeder). Use the total (PV,ges) for planning the control cabinet.

Using heat-exchange units in the control cabinets 

Improperly installed and operated heat-exchange units are a risk to the drive components installed in the control cabinet due to the condensation and condensed water which these may cause! Humid air enters the cabinet and, as it cools, condenses onto the installed drive components. If the heat-exchange unit is not properly installed in the control cabinet, accumulating condensing water can drip into the installed drive components or be sprayed into them by the cold air current.

Avoiding condensation

Proper use of the heat-exchange units: • When using heat heat-exchange units, the cabinets must be well sealed so that moisture cannot form caused by humid outside air entering the cabinets! • In the event that the control cabinets are operated with open doors (startup operation, servicing, etc.), ensure that the drive components are never cooler than the air in the control cabinets after the doors have been closed. Otherwise, condensation may occur. For this reason, it is important that the heat-exchange unit continues to operate when the system has been shut down to ensure that temperature within the control cabinet does not deviate from that of the drive components.

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