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Electronic-type alternating-current overload alarming device

A technology of alternating current and alarm devices, which is applied in measuring devices, measuring current/voltage, measuring electrical variables, etc., can solve the problems of low system detection accuracy, complex internal structure, and many electronic components, and achieve high measurement accuracy, The effect of simple internal structure and fewer components

Inactive Publication Date: 2015-09-09
TIANJIN BAILI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a common phenomenon at present: the current AC current detection and alarm device has high cost, large volume, complex internal structure, low system detection accuracy, and many electronic components are used.

Method used

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  • Electronic-type alternating-current overload alarming device

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Embodiment Construction

[0007] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0008] Such as figure 1 As shown, one end of the current transformer CT1 is connected to GND, the other end is connected to one end of the resistor R1, and one end of the resistors R4 and R7 is connected at the same time; the other end of the resistor R1 is connected to GND; the other end of the resistor R4 is connected to the negative phase input of the operational amplifier AR2 pin and one pin of resistor R2; the other pin of resistor R2 is connected to the output terminal of operational amplifier AR2 and one end of resistor R5; the positive pin of power supply of operational amplifier AR2 is connected to +12V, and the negative pin of power supply is connected to -12V; the terminal of resistor R7 The other end is connected to the negative phase input...

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Abstract

The invention relates to an electronic-type alternating-current overload alarming device. The device is characterized by comprising a current transformer (CT1), resistors (R1-R9), an electrolytic capacitor (C1), a diode (D1), operational amplifiers (AR1-AR3), a triode (Q1) and a relay (K1). The electronic-type alternating-current overload alarming device is low in cost, simple in internal structure, small in size, low in power consumption, high in measuring accuracy, small in amount of used devices, stable in function and environment friendly.

Description

technical field [0001] The invention belongs to an alternating current overload alarm device, in particular to an electronic alternating current overload alarm device. Background technique [0002] With the rapid and extensive application of electronic technology in various fields, the application of electronic intelligent AC circuit current monitoring equipment is becoming more and more extensive. When the current in the monitoring circuit exceeds the set value, the monitoring device can send out an alarm signal Remind the staff to pay attention. However, there is a common phenomenon at present: the current AC current detection and alarm device has high cost, large volume, complex internal structure, low system detection accuracy, and many electronic components. Contents of the invention [0003] In order to solve the technical problems in the known technology, the present invention provides an electronic alternating current overload alarm device with simple structure an...

Claims

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Application Information

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IPC IPC(8): G01R19/165
Inventor 史祺陈浩李津莲刘健勇
Owner TIANJIN BAILI ELECTRIC CO LTD