Abstract: A combined electric appliance with a multi-capacitive screen insulation core has three groups of capacitive screens of main capacitor C1, low-voltage capacitor C2 and anti-interference capacitor C3 arranged in an insulation core of a high-voltage electric appliance such as a high-voltage bushing, a cable terminal head or the like simultaneously. A voltage display apparatus, an insulation monitor and a local discharge detector which meet accuracy requirements access a terminal of the low-voltage capacitor C2. Energy is extracted from the terminal to power the electric appliance. A grounding part for current flow is sleeved with a current transformer. The insulation core is sleeved with annular zinc oxide arrester valve plates. Head ends of the valve plates are connected with a terminal of the bushing or the cable head. Tail ends of the valve plates are connected with a flange of the bushing or the cable head.

Abstract: An organic combined insulated dry electronic transformer for outputting an optical signal, in which an organic insulated capacitor voltage-divider insulator is used as the main insulator to bear all the whole high voltage. A coreless coil is wound around the outside of the tap of capacitance plate in the capacitor voltage-divider insulator to measure current; or a low voltage signal is taken from the capacitance plate adjacent to the tap of capacitance plate in the capacitor voltage-divider insulator to measure voltage; then the received current signal or the voltage signal is transformed into an optical signal by a converter that converts an electric signal into an optical signal and then outputted. The coreless coil as a current sensor has ground potential and the capacitor as a voltage sensor has low potential.