Distribution Transformers
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Quality management The whole internal process is control-led by an efficient ERPsystem. (Enterprise Resource Planning) The SGB group is certifiedaccording to:ISO 9001Օ Federal Railway welding license Products distribution transformers50 Ֆ 4000 kVAup to a High Voltage of 36 kV ONAN 50 or 60 Hz oil-immersed coils Օ earthing transformers neutral grounding transformers Օ earth-fault neutralizer single-phase transformers > Markets SGB group manufactures and teststransformers for the world market. We meet the following standards:Օ DIN/VDE IEC 76 Օ British Standard ANSI/IEEE Օ CAN/CSA NEMA Օ UL...

Iron core cold-rolled grain-oriented sheetsՕ step-lapӓ-laminationThose measures reduce no-loadlosses and no-load currents as well as noise emission. > High voltage winding fully and semi-automaticwinding machinesՕ enamel-insulated winding wirewith steady winding pull on carrier cylinder, or directly on the LV winding layer insulation of high-qualitycable paperՕcovering bandage made of shrinking foil for a compact winding with good short-circuit response and optimum impulse voltage distribution. > Low voltage foil winding ӕaxial current distribution adjusts freely reduced shearing...

Vacuum drying low frequency or solvent-vapour dryingՕ filling of dried and degassed mineral oil 5 Assembly of active parts short-circuit-proof assemblywith profile steel and support of coilsՕ secure fixation of the electricalconnectionsThe active part is securely joined tothe cover and supported against the bottom of the tank. >

Corrosion protection two component painting withmin. layer thickness of 125 յm coatings by flooding or dipping methodՕ on request the tank can also be manufactured in hot-dip galvanised design Cover > The cover is made of doubling-free high-quality steel. It is bolted to the tank, and can also be welded to the tank on request. Beside bushings and lifting lugs the required control and monitoring devices are located on the cover. Tank corrugated tank up to 4 MVAmanufactured by usՕ modern folding facility processesthe steel sheet into high-quality corrugated walls after the tank has been...

Insulating liquids mineral oil acc. toDIN VDE 0370 / part 1Օ synthetic organic ester(Midel 7131) acc. to DIN VDE 0375 part 1 and DIN EN 61099 (IEC 1099) > Design variations tap-changerՕ outer and inner cone bushings transformer terminals and covers Օ cable boxes terminal boxes > Monitoring devices Օ dial-type thermometer temperature alarm device Օ magnetic oil-level indicator pressure relief valve Օ Buchholz relay protection hermetic protection block Օ dehydrating breathercurrent transformers / thermal imagescan also be mounted on request. 7 >

Short-circuit strength This test is performed within thescope of type tests, however, can also be carried out in well-known and reputable test laboratories on request. After longstanding testing practice as well as positive experience on the part of our clients, the use of a cylinder block stuck to LV-windings in combi- nation with the HV-layer windings has proved to be problem-free. Type and special tests > acc. to DIN VDE 0532 temperature rise testՕ impulse voltage test measurement of sound/noise levelՕ partial discharge measurement Routine tests acc. to DIN VDE 0532 test with applied...

Reducing the noise emitted by thetransformer to the environment is becoming more and more important.Therefore our distribution transfomersalso offer besides the standard design acc. to DIN 42500 ֖ reduced losses and noise levels, too.In addition to the choice of flux den-sity and core material, the step-lap technique of joining the legs and yoke also reduces noise levels and no-load losses in SGB transformers. A-evaluated sound pressure level Sound / noise measurements are car-ried out as special tests at regular intervals. > PA in dB A-evaluated sound power level L > WA in dB and related...