×
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

ANSI/IEEE C57.12.10
2

ANSI/IEEE C57.12.10

ANSI/IEEE C57.12.10

(OP)
with reference to the above standard,i have a 2500kva , 13.8kv,480v xfmr with power BIL. para 5.7.2 of ansi c57.12.10 states that a pressure vacuum bleeder is to be provided for XFMR rated 2500kva and above with power BIL. my transformer is sealed type. is the pressure/vacuum bleeder required for a sealed type transformer.

RE: ANSI/IEEE C57.12.10


For 2500kVA or higher—it seems like, regardless of cooling rating, a bleeder is mandated correlated with BIL [Table 8.}  Apparently the consensus is that characteristics like fault-gas volume may be too great for larger power ratings to permit the sealed-tank design as discussed in §5.7.1 for <2500kVA versions.  There may be historic evidence that, above a particular size, potential for tank rupture is to great a risk without an integral pressure-relief valve.
  

RE: ANSI/IEEE C57.12.10

(OP)
the xfmr does have a pressure relive device.but now the question is regarding the vacuum bleeder.what are the possibilities of a vacuum being created inside a sealed type transformer.

RE: ANSI/IEEE C57.12.10


Offhand, I would think the manufacturer would design the tank to remain unaffected over some published ambient-temperature and load range.  It may pay the get specific numbers from the manufacturer {either before or after procurement.}  
  

RE: ANSI/IEEE C57.12.10

A pressure relief operation followed by load removal and cooling would cause this condition.

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