GN19 Indoor high voltage isolation switch Isolation switch is designed to provide safety isolation from high voltage without load for the purpose of installation and maintenance. Our Serie GN19-12 are indoor HV isolation switches with three-phase AC 50Hz and rated voltage of 12kV. It meets the requirements of GB1985-2004,GB/T11022-1999,and IEC62271-102, providing a more reliable performance by replacing traditional porcelain isolator with Epoxy resin. Raled Voltage (kV) Rated Current (A) Short-time Withstand Current (kA/4S) Dynamic Heat Stable Current (kA) 12 630 20 50 12 1000 31.5 80 12 1250 40 100 7.2 1600 31.5 (1s) 80