×
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

Transformer Nameplate Information

Transformer Nameplate Information

Transformer Nameplate Information

(OP)
Just wondering, what kind of information will you find on a transformer nameplate? I assume ratings, voltages, cooling configurations, but what else? Thanks!

RE: Transformer Nameplate Information

Impedance, taps, bushing CTs.  

There are ANSI and (I'd assume) IEC standards for transformer nameplates.  

 

David Castor
www.cvoes.com

RE: Transformer Nameplate Information

Mass or core & windings, mass of oil, overall mass.

See IEC 60076
  

----------------------------------
  
If we learn from our mistakes I'm getting a great education!
 

RE: Transformer Nameplate Information

Vector diagram.
Basic Impulse Level.
Manufacturer.

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

RE: Transformer Nameplate Information

Try a Google Image Search for "Transformer Nameplate".

It will bring up dozens of examples of real Nameplates so you can see typical details for yourself.

RE: Transformer Nameplate Information

NEC Article 450 says:
Name of manufacturer; Rated kVA; Frequency; Primary and secondary voltages; Impedance of transformers 25kVA and larger; Required clearances for transformers with ventilation openings; Amount and kind of insulating liquid where used; Temperature class for the insulation system of dry-type transformers.
 

RE: Transformer Nameplate Information

IEC 60076-1 indicates:
7.1 Information to be given in all cases:
a) Kind of transformer (for example transformer, auto-transformer, booster transformer, etc.).
b) Number of this standard.
c) Manufacturer's name.
d) Manufacturer's serial number.
e) Year of manufacture.
f) Number of phases.
g) Rated power (in kVA or MVA). (For multi-winding transformers, the rated power of each winding should be given. The loading combinations should also be indicated unless the rated power of one of the windings is the sum of the rated powers of the other windings.)
h) Rated frequency (in Hz).
i) Rated voltages (in V or kV) and tapping range.
j) Rated currents (in A or kA).
k) Connection symbol.
l) Short-circuit impedance, measured value in percentage.
m) Type of cooling. (If the transformer has several assigned cooling methods, the respective power values may be expressed as percentages of rated power, for example ONAN/ONAF 70/100 %.)
n) Total mass.
o) Mass of insulating oil.
7.2 Additional information to be given when applicable ... depend on transformer type and accessories

RE: Transformer Nameplate Information

pwrshl
C57.12.00-2000, 5.12.2 Nameplate information. States "...Unless otherwise specified, the minimum information shown on the nameplate shall be..."

Serial number
Month/year of manufacture
Class (ONAN, ONAF, etc.)
Number of phases
Frequency
kVA (or MVA) rating
Voltage ratings
Tap voltages
Temperature rise, ˚C
Polarity (single-phase transformers)
Phasor diagram (polyphase transformers)
Percent impedance
Basic lightning impulse insulation levels (BIL)
Approximate masses in kg (pounds)
Connection diagram
Name of manufacturer
Installation and operating instructions reference
The word transformer or autotransformer
Step-up operation suitability
Tank, pressure, and liquid data
Type of insulating liquid (generic name preferred)
Conductor material (of each winding)

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