×
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 determine what type of harmonic flitering to use?

How to determine what type of harmonic flitering to use?

How to determine what type of harmonic flitering to use?

(OP)
We are going to be installing several new printing press lines , all using variable speed AC drives. We are also having to supply new 11kv/415v transformers. We estimate total power of transformers to be around 1900KVA. We are put off by the cost of 'active front end' drives , and were thinking of autotransformers to sort out the harmonics. Any body have any other ideas?

RE: How to determine what type of harmonic flitering to use?

6/30/00
One may use passive harmonic filters, active harmonic filters, motor drives with phase shifting transformers (rectifier or pulse transformers), and some combination of phase shifting transformers with passive harmonic filters. However, the cost analysis comparison study is recommended since all alternatives to the active front end motor drives have their weak sides, e.g. transformers burn, passive harmonic filters can create resonances, active harmonic filters are costly (but do good filtering).

RE: How to determine what type of harmonic flitering to use?

On your problem on the printing press line.
I am presently exsperimenting with power factor
improvers.I have several single face and 3 phase
unit in the field. So far power savings are
over 30%. At a truck stop in NJ I brought the Kwh
use down from 11000+Kwh to 7500 Kwh. [ 30 days ]

Fritz

RE: How to determine what type of harmonic flitering to use?

Unless the drive loads are varying throughout the load cycle, passive filters across the loads should give good results. One needs to understand the level of harmonics by actually measuring the harmonics and then decide if the harmonics are really harmful or can stay. PF can be improved on HT side by HT compensation.

Are there any statutory regulations in your country on the harmonic levels say to comply with IEEE - 915.

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