Re: Hipot requirements for TNV circuits

In a message dated 7/1/99, Peter Merguerian writes: > By the way, a transformer is not always needed on a modem. The > new design of modems have capacitors (not required to be > Approved) between the TNV-3 and SELV. Hi Peter: It is certainly true that some of the new modem DAA devices use

Hipot requirements for TNV circuits - Thank You.

THANKS to all who offered their knowledge to help me with this issue. Have a Fun & Safe 4th of July weekend.. Sincerely, George Sparacino I have a modem product that failed the hipot requirement defined in > > cls 6 of 950. My understanding is that an isolation xfmr between Telco > & >

Re: Hipot requirements for TNV circuits

George, Do you have transient voltage surge supressors. Maybe this is why you failed the hipot. The standard allows you to pass the Impulse Test in lieu of hipot. Try this method. Regarding insulation between TNV-3 and SELV/Earth the standard allows you the following alternatives routes to co

Hipot requirements for TNV circuits

Hello Once Again .. Everyone, I have a modem product that failed the hipot requirement defined in cls 6 of 950. My understanding is that an isolation xfmr between Telco & SELV is needed and clearance from Telco & gnd is to be 3mm minimum. Does anyone have any other general design guideli