# Heat transfer: does the heat generated in a cable get transferred to the electrical components?

I have a 1000 V, 50 sq mm, double insulated (XLPE) copper conductor cable. This cable is being connected to a power electronic component. The current flowing through it is 230 Amps DC. The cable temperature under steady state operation was found to be 110 °C. Cable insulation max temperature is 150 °C. The temperature range of power electronic component is max 85 °C. The power electronic component also has liquid cooling using Glycol/Water coolant.

What I would like to understand is whether the heat from the high voltage cable will get transferred over to the Power electronic components like Inductors and capacitors? Should I be concerned about my power electronic components getting fried up because of heat transfer from my cable to the electrical components?

To give you a better understanding, I have attached a block diagram of my system.

• Of course it can. Yes you should be concerned. I'd guess the cable-to-component conduction is worse than the component-to-liquid conduction but you know, that does depend on how you built it. Jun 14 at 9:12
• You could calculate the thermal resistance in between the cable and the cooling system, and from that calculate the temperature of each component. I've seen these calculated with an electrical analogy where heat generators are current sources, thermal resistances are resistors, etc. There's probably FEM solvers out there that give more accurate results for distributed heat sources (like cables and busbars). I'm not an expert in the field of heat transfer. Alternatively, you could build a prototype or scale model and measure it. Jun 14 at 9:15
• Thank you for your suggestions @user253751 Jun 21 at 5:16