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www.GEMultilin.com
142
www.GEMultilin.com
142
Transformer Principles
T
ransformer Pr
ot
ection
www.GEMultilin.com
www.GEMultilin.com
Typical Nameplate Data
Transformer Nameplate Data:
Correct transformer protection setup and configuration is essential to ensuring, not only proper but, optimized transformer operation (in terms of
both performance and efficiency). The key pieces of data required to maximize transformer operation can be found on the transformer nameplate,
which is supplied by every manufacturer.
Defined by codes and standards, depending on the kVA rating of a transformer, there is a minimum amount of data that must be shown on a
nameplate. For transformers rated above 500 kVA the following information is required:
Nameofmanufacturer
Serialnumber
Month/yearofmanufacture
Coolingclass
Numberofphases
Frequency
KVAorMVArating
VoltageRatings
TapVoltages
RatedTemperatureRise(degreeC)
Phaseorvectordiagram(forpolyphasetransformers)
Percentimpedance
Basiclightningimpulseinsulationlevels(BILratings).Note:TheBIL
rating for each winding and each bushing are indicated
Approximatemassoftheentireunit.Individualweightsare
provided for the core and coils, as well as the tank and fittings
Connectiondiagramshowingallwindingterminationswitha
schematic plan view showing all fixed accessories
Installationoperatinginstructionsreferences
Suitabilityforstep-upoperation
Maximumpositiveandnegativeoperatingpressuresoftheoil
preservation system
Liquidlevelbelowthetopsurfaceofthehighestpointofthe
highest manhole flange at 25 degrees C
Changeinliquidlevelper10degreeCchange
Oilvolumeofeachtransformercompartment
Typeofinsulatingliquid
Conductormaterialofeachwinding