×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Surge protector behaviour for AC and DC voltages

Surge protector behaviour for AC and DC voltages

Surge protector behaviour for AC and DC voltages

(OP)
Hi everyone,

I've got a question about the concept of effective value of a voltage. Per definition, the rms voltage is the value of a dc voltage that would cause the same power dissipation on a resistance. So it allows a correlation between e.g. an AC and a DC voltage, for what concerns effects related to the power. Does this AC/DC correlation also make sens when looking at the resistance to overvoltage?

More precisely, in the context of a surge protector (discharge tube or varistor or both combined), if the documentation indicates the maximal operating voltage and the voltage protection level as rms values, does it make sens to estimate the behaviour whith DC voltage by multiplying these values with sqrt(2) or should the rms value be directly taken for the DC behaviour?

Thanks

RE: Surge protector behaviour for AC and DC voltages

More precisely, in the context of a surge protector (discharge tube or varistor or both combined), if the documentation indicates the maximal operating voltage and the voltage protection level as rms values, does it make sens to estimate the behaviour whith DC voltage by multiplying these values with sqrt(2) or should the rms value be directly taken for the DC behaviour?

Yes 1.41x rms is the dc value it works with.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources