JPH0160491U

JPH0160491U -

Info

Publication number: JPH0160491U
Application number: JP15515087U
Authority: JP
Priority date: 1987-10-09
Filing date: 1987-10-09
Publication date: 1989-04-17

Description

[Brief explanation of the drawing]

第１図はこの考案による避雷器しや断装置を示
す構成図、第２図はその動作説明図、第３図は従
来の構造を示す断面図である。図において、８は避雷器、９は電流検出器、１
０は電流比較器、１３は時間比較器、１６はしや
断手段である。なお、各図中同一符号は同一また
は相当部分を示す。 FIG. 1 is a configuration diagram showing a lightning arrester shearing device according to this invention, FIG. 2 is an explanatory diagram of its operation, and FIG. 3 is a sectional view showing a conventional structure. In the figure, 8 is a lightning arrester, 9 is a current detector, 1
0 is a current comparator, 13 is a time comparator, and 16 is a disconnection means. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A lightning arrester connected in series with a surge arrester;
A current detector that detects the current passing through the lightning arrester, a current comparator that generates an output signal when the output of this current detector is larger than a reference value, and a generation time of the output signal of this current comparator that is equal to the reference value. 1. A lightning arrester shearing device comprising: a time comparator that transmits an output when the time is longer, and uses the output to cut off the shearing means. (2) The time comparator is characterized by comprising a clock pulse generator driven by the output of the current comparator, and a pulse counter that sends out an output when the number of output pulses from the clock pulse generator exceeds a predetermined number. Scope of claim for utility model registration No. 1
Lightning arrester cutoff device as described in Section 1.