Hi Peter: >Well, can you share how your compliant products (ie double insulated to earth >Class I products) comply at the transistor/earthed heat sink interface? Do you >have at least two layers of insulation where each layer meets the reinforced >insulation dielectric strength test requirements? I do not think so? In the power supplies I have been associated with, the heat sink is connected to the negative dc rail, not to ground. Consequently, there is no need for double insulation between the switching transistor and the heat sink. >How is the weather in San Diego? The past few days have been hot, with temperatures yesterday at the coast of 80 F, and in our back yard of 95 F. So, yesterday was the hottest day of the year in San Diego. Dry heat, so it was not too uncomfortable -- not as bad as a few weeks ago when we had 85 F and high humidity. Best regards, Rich --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
