JPS6320227U

JPS6320227U -

Info

Publication number: JPS6320227U
Application number: JP11171486U
Authority: JP
Priority date: 1986-07-21
Filing date: 1986-07-21
Publication date: 1988-02-10

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す図、第２図
は第１図に示す主要部分のタイム・チヤート、第
３図は従来の電圧モニタ装置を示す図、第４図は
第３図に示す主要部分のタイム・チヤートである
。図において１はトランス、２は基準電圧発生回
路、３はコンパレータ、４はタイマ、ｃは交流信
号、ｄは基準信号、ｅは制御信号、ｆは警報信号
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。 Figure 1 is a diagram showing an embodiment of this invention, Figure 2 is a time chart of the main parts shown in Figure 1, Figure 3 is a diagram showing a conventional voltage monitor device, and Figure 4 is Figure 3. This is a time chart of the main parts shown below. In the figure, 1 is a transformer, 2 is a reference voltage generation circuit, 3 is a comparator, 4 is a timer, c is an alternating current signal, d is a reference signal, e is a control signal, and f is an alarm signal. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A transformer that converts the input AC power voltage and outputs an AC signal, a reference voltage generation circuit that generates a predetermined constant voltage reference signal, and a first input terminal of the two input terminals. The reference signal output from this reference voltage generation circuit is input to the second input terminal, the AC signal output from the transformer is input to the second input terminal, and the potential of the AC signal applied to the second input terminal is changed to the first input terminal. A comparator that compares the potential of a reference signal given to the input terminal and outputs the result as a control signal, and a control signal output from this comparator is input, and the input signal changes after a predetermined period of time. A voltage monitoring device comprising a timer that times out when the voltage does not occur and outputs an alarm signal as a result, and outputs an alarm signal when the potential of an input AC power source falls below a certain potential.