... hereinafter referred to as APG process) forming a new sensor, with nice appearance, local power, climb from the ... 12, 24 and 40.5 kV, frequency for 50 Hz ac indoor hv electric equipment, and voltage matching ... referred to as APG process) forming a new sensor, with nice appearance, local power, climb from the ... 12, 24 and 40.5 kV, frequency for 50 Hz ac indoor hv electric equipment, and voltage matching ...