GN30-12 (D) chotsani chosinthira ndi zida zamagetsi zamkati zamagetsi zamagetsi 12kV, magawo atatu a AC50 / 60Hz. Amagwiritsidwa ntchito kupuma ndikusinthira zida zamagetsi za HV pansi pamavuto opanda katundu. Kusinthaku kumagwiritsa ntchito kulumikizana kozungulira komwe kumayikidwa pa switchgear yaily. Imagwiritsanso ntchito khoma kudzera pakupanga. Amapangidwa malinga ndi IEC62271-102