JPS6222567U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the partial discharge detection device according to this invention, Fig. 2 is a partial cross-sectional view showing a part of oil-immersed equipment to which this invention is applied, and Fig. 3 is a block diagram showing an embodiment of the partial discharge detection device according to this invention. 4 is a block diagram showing a conventional partial discharge detection device, FIG. 5 is a partial sectional view showing a part of oil-filled equipment to which the conventional device is applied, and FIG. 6 is a conventional device FIG. In the figure, 1 is a sensor section, 1a is an acoustic sensor, 1c is an acoustic signal discrimination circuit, 1d is a digital electric/optical converter, 6 is a signal processing section, 6a is an electric signal detection circuit, and 6b is a digital optical/electrical converter. ,6
Reference numeral c represents a gate circuit, 6d represents a clock pulse generation circuit, and 6e represents a counter. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] an acoustic sensor that detects an acoustic signal generated by partial discharge and converts it into an electrical signal; an acoustic signal discrimination circuit that generates an electrical pulse signal when the output level of the acoustic sensor exceeds a predetermined value; a sensor section consisting of a digital electrical/optical converter that converts an electrical pulse signal into an optical pulse signal; an electrical signal detection circuit that detects an electrical pulse signal generated by partial discharge and generates an output; and the digital electrical/optical converter. a digital optical-to-electrical converter that receives an optical pulse signal from the device and converts it into an electrical pulse signal; and the gate is opened by the output signal of the electric signal detection circuit, and the gate is closed by the output signal of the digital optical-to-electrical converter. A partial discharge detection device comprising a signal processing section comprising a gate circuit and a counter that counts clock pulses applied from a clock pulse generation circuit via the gate circuit.