×
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

TRENCH IOSK 362 SR Current Transformer

TRENCH IOSK 362 SR Current Transformer

TRENCH IOSK 362 SR Current Transformer

(OP)
Does any one have any photos or pictures of internal guts of a TRENCH CT?

I am just trying to get an idea on how this CT actualy looks internally

Thanks

RE: TRENCH IOSK 362 SR Current Transformer

Looks like a chunk of iron with a bunch of wire wrapped around it.

RE: TRENCH IOSK 362 SR Current Transformer

I assumed you looked at the brochure on the Trench web site?

It is an oil-paper insulated CT.

What specifically do you want to know about the insides?

RE: TRENCH IOSK 362 SR Current Transformer

(OP)
I am looking at one of their Nameplate drawing and it shows primary with 4 rectangles and the winding past one of them is connected to the case.
Also, the secondary seems to show one long rectangle with a line above it and it didn't make sense to me.

The drawing is copyrighted or else I would have posted it.

RE: TRENCH IOSK 362 SR Current Transformer

up to you, but i would think posting a nameplate drawing of one of your units should be perfectly ok.

I can probably explain it to you if you choose to post it.

RE: TRENCH IOSK 362 SR Current Transformer

That is a 4 turn primary winding. Each box represents a primary conductor. It shows them all in series, therefore, a 4-turn primary winding. The connection shown between the 1st and 2nd conductor is the potential connection to the head-housing, which is at line potential.

On the secondary schematic, the line above means that it's an iron-core, as opposed to an air-core, i.e. something like a rogowski coil.

RE: TRENCH IOSK 362 SR Current Transformer

(OP)
Thanks scottf.

So if my CT ratio is 200:5 does it mean that I have 160 turns in the secondary?

How are these 4 primary conductors laid out? Are they twisted together? or is it representing one conductor wraped 4 times around the core?

RE: TRENCH IOSK 362 SR Current Transformer

Yes...you would have 160 turns on the secondary.

I'm not sure of the specifics on this design, but I assume that the conductors are aluminum 'rods', i.e. solid conductors. They would be laid out in a manner where they could be connected in series via return conductors (most likely outside conductors and the head housing) wrapping around the head.

They are not twisted, but rather for 4 independent turns around the head connected in series.

RE: TRENCH IOSK 362 SR Current Transformer

(OP)
Thank you Sir!

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