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VRC type

VRC type. MR Vacuum switch One resistor. Tests in Sarajevo. 110/21/10kV 31MVA Yyd5 OLTC VRC III 400Y 1.5 Ohms. up. zoom. More zoom. Down – portion around neutral. Down zoom. Principle. Tests in Canada. Hydro One, s/s KARN, T1 3 x VRC 21 pos adding /subtracting

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VRC type

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  1. VRC type MR Vacuum switch One resistor

  2. Tests in Sarajevo 110/21/10kV 31MVA Yyd5 OLTC VRC III 400Y 1.5 Ohms

  3. up

  4. zoom

  5. More zoom

  6. Down – portion around neutral

  7. Down zoom

  8. Principle

  9. Tests in Canada • Hydro One, s/s KARN, T1 • 3 x VRC 21 pos adding /subtracting • AutoTrafo Yy with D tertiary 230/131/13.8kV • 250MVA • Non linear resistors in the tap winding

  10. Manually operated OLTC

  11. Tests in Barcelona • VRC III 400Y tap changer 3.1 Ohm 21pos • Trafo YNd11 220/25kV 65MVA • No strange graph behavior • Adding subtracting

  12. Taps 21-1 (same 1-21)

  13. Straight line

  14. The end

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