×
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

how to measure watt hour and volt ampere reactive hour

how to measure watt hour and volt ampere reactive hour

how to measure watt hour and volt ampere reactive hour

(OP)
what is the diffrence in construction ?



HELP SYRIA

RE: how to measure watt hour and volt ampere reactive hour

No difference. With the old induction disk meters, a highly reactive transformer was used to shift the voltage to the meter voltage coils by 90 degrees so that the meter responded to reactive current rather than active current. The little phase shift transformers were small enough that one could be easily held in one hand. Standard Watt-hour meters were used.

Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: how to measure watt hour and volt ampere reactive hour

Modern electronic meters do both together. All done in firmware, and all done roughly the same in terms of math.

Best to you,

Goober Dave

Haven't see the forum policies? Do so now: Forum Policies

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