CORE STACKING & CUTTING
Three-phase transformers include three-leg or five-leg geometry. Single phase transformers are designed using two-leg, three-leg or four-leg geometry. Our automatic GEORG cutting machines and customized, state-of-the-art GEORG stacking table include swing shear lines for high quality, cost-effective production of these complex power transformer cores. Advantages of this system include:
- Laminations cut with absolute minimum burr height
- High level of stacking accuracy
- Careful treatment of highly sensitive surfaces
- Step lap construction reduces no load losses and noise levels
COIL WINDING
- Fully enclosed and environmentally-controlled coil winding room
- Larger windings produced on state-of-the-art vertical and horizontal winding machines
- Interleaved, shielded disc, helical, disc or layer construction (depending on voltage and impulse rating)
DRYING
State-of–the-art Hedrich front entry vapor phase chambers utilized for coil stabilizing and core/coil assembly drying, including iso-static pressing for coil stabilization and precise measurements, ensuring compliance to design standards. Other benefits include
- Optimization of heat transfer, process time and residual moisture
- Iso-static sizing leads to good elastic behavior and ‘sizing pressure’ is maintained during service to provide safety against short circuit forces
ASSEMBLY
- Humidity and dust controlled environment to minimize potential for contamination and moisture ingress, ensuring <0.5% moisture content in the finished transformer
- Low humidity “desert” room to deter moisture ingress during final adjustments after vapor phase prior to transformer tanking
- 500 ton crane capacity
TESTING
- Faraday Cage test lab electrically and mechanically isolated to minimize outside interference in test results and ambient partial discharge <5pc
- State-of-the-art Haefely test equipment utilized to ensure that each transformer meets or exceeds industry standards and customer specifications
- Capable of performing routine and special tests, including dielectric, heat run and frequency response analysis (FRA) as per industry standards
- Capable of performing sound level testing