The following information
is displayed on the transformer name plate.
- Kind of Transformer
Auto transformer, Booster transformer etc.
- Number of Standard ( IS code )
- Manufacturer’s name
- Manufacturer’s serial number
- Year of Manufacture
- Temperature class of insulation ( For dry type transformer )
- Number of phases
- Rated kVA
The rated kVA
for each winding is given for multiphase winding transformer.
- Rated power for each kind of cooling
- Rated frequency
- Rated voltage including tapping voltage
- Rated current for each kind of cooling
- Connection diagram
It is given in
the cases where the connection symbol will not give complete information
regarding the internal connections
- Percentage impedance voltage at rated current
The measured
value corrected at 75 degree centigrade. The reference power should be given
for multi winding transformers.
- Type of cooling
If the
transformer has several methods of cooling, the outputs that differ from rated
power may be shown as percentage of rated power.
( Example : ONAN
/ ONAF , 70% / 100% )
- Type of filling
- Operating pressure range
- Maximum and minimum absolute pressure for which enclosure is designed
- Pressure and temperature of filling medium at the time of sealing
- Total mass
Transformer exceeding
5 tonnes
- Insulation level
It is applicable
for winding rated for voltages of 3.6 kV and above and to the neutral end of
the windings with non uniform insulation.
- Temperature rise ( If specified )
- Insulation liquid
It is specified
if not mineral oil.
- Winding fitted with tapings
Table giving the
tapping voltage, the tapping current and tapping power of each winding for each
tapping
- Short circuit impedance on the extreme tapings and on principle tapping
- Information on the ability of the transformer to operated at voltage exceeding 105% of the tapping voltage
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