Jester
Full Member level 6
I have been asked to tweak the design of a control board used in an industrial application for use in the USA. The board was designed to meet PD2 and now they want it to meet pollution degree 3 specifications. The only problem area I see is the connectors for measurement of 240Vac nominal.
The creepage to other circuits appears adequate, however functional creepage for 240V is 151mil or 3.8mm and the connector has 5.08mm pin spacing, so even with oval pads the creepage is only 97mil or 2.5mm (Okay for PD2 but not PD3).
I would prefer to keep using the same connectors Weidmuller 1594540000 https://www.digikey.com/product-detail/en/weidmuller/1594540000/281-3145-ND/492619
IF I add a slot between the connector pin pads, the creepage would be 2.5 +1.6 = 4.1mm. Does anyone see any issues with this approach?
I have used a 1mm slot in the past, from a manufacturing perspective, what is an ideal slot width?
Looking forward to comments, thanks in advance.
The creepage to other circuits appears adequate, however functional creepage for 240V is 151mil or 3.8mm and the connector has 5.08mm pin spacing, so even with oval pads the creepage is only 97mil or 2.5mm (Okay for PD2 but not PD3).
I would prefer to keep using the same connectors Weidmuller 1594540000 https://www.digikey.com/product-detail/en/weidmuller/1594540000/281-3145-ND/492619
IF I add a slot between the connector pin pads, the creepage would be 2.5 +1.6 = 4.1mm. Does anyone see any issues with this approach?
I have used a 1mm slot in the past, from a manufacturing perspective, what is an ideal slot width?
Looking forward to comments, thanks in advance.