Hello,

i am really confused about how to routing the circuit in the picture. The squares T1 and T2 are voltage transducer LV 25-p and at the clamp J3 are about 700V and at clamp J1 there are about 490V. I dont understand how to route this circuit without getting in trouble with creepage and clearance. I would be thankful if someone could help me with this topic.

 

Have a large keepout (traces, floods, everything - absolutely NO copper) underneath the secondary of both transformers - both sides, if there are traces on both. This is so if the transformer blows up, there is no path from the high voltage side to the low voltage side. I don't know the exact keepout require for these voltages, but look at a SMPS to get some idea for their voltages.

I don't know what creepage means in this context.