CN108387829A - A kind of industrial frequency withstand voltage test device - Google Patents

Abstract

The invention discloses a kind of industrial frequency withstand voltage test devices, including experiment change, divider and console；The experiment becomes and divider electrical connection；The experiment change is electrically connected with test item；The divider is in parallel with test item；The console and experiment are electrically connected with electric current relay between becoming；The normally-closed contact of electric current relay connects the spare opened point of console；The normally-closed contact of electric current relay is changed to the switching winding that normally opened signal accesses input switch cabinet；The ground terminal and high pressure tail end that electric current relay access experiment becomes；The input that the experiment becomes terminates test circuit；When the electric current in test circuit is more than over-current adjusting value, the normally-closed contact of electric current relay disconnects, and console controls test circuit and disconnects；Industrial frequency withstand voltage test device of the present invention be avoided that because electronic component break down so as to cause due protective device it is not operating caused by equipment and personal injury.

Description

A power frequency withstand voltage test device

technical field

The invention relates to a power frequency withstand voltage testing device capable of avoiding equipment and personal accidents caused by failure of proper protection devices due to failure of electronic components.

Background technique

The overcurrent protection of the conventional power frequency withstand voltage test device generally samples the current in the circuit through the current measuring device; when the collected current signal reaches the overcurrent setting value, the protection device operates to disconnect the power frequency withstand voltage test device power supply for overcurrent protection. During use, when the electronic components fail due to various reasons, the protection device does not operate, causing equipment and personal injury or death accidents. We have developed a power frequency withstand voltage test device that can avoid equipment and personal accidents caused by the failure of the proper protection device due to the failure of electronic components.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a power frequency withstand voltage test device that can avoid equipment and personal accidents caused by failure of the proper protection device due to failure of electronic components.

In order to achieve the above object, the technical solution adopted in the present invention is: a power frequency withstand voltage testing device, including a test variable, a voltage divider and a console; the test variable is electrically connected to the voltage divider; The test product is electrically connected; the voltage divider is connected in parallel with the tested product; a current relay is electrically connected between the console and the test transformer; the normally closed contact of the current relay is connected to the standby normally open point of the console; The normally closed contact is changed to a normally open signal and connected to the opening coil of the input switch cabinet; the current relay is connected to the ground terminal and the high voltage tail end of the test transformer; the input terminal of the test transformer is connected to the test circuit; when the current in the test circuit When the overcurrent setting value is exceeded, the normally closed contact of the current relay is closed, and the console control test circuit is disconnected.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

The power frequency withstand voltage testing device of the present invention can avoid equipment and personal accidents caused by failure of proper protection devices due to failure of electronic components.

Description of drawings

Below in conjunction with accompanying drawing, technical solution of the present invention will be further described:

Accompanying drawing 1 is the working principle diagram of the power frequency withstand voltage testing device of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Accompanying drawing 1 is power frequency withstand voltage testing device of the present invention, comprises test variable, voltage divider and console; Described test variable is electrically connected with voltage divider; Described test variable is electrically connected with tested product; The voltage divider is connected in parallel with the tested product; a current relay is electrically connected between the console and the test transformer; the normally closed contact of the current relay is connected to the spare normally open point of the console; the normally closed contact of the current relay is changed to The normally open signal is connected to the opening coil of the input switch cabinet; the current relay is connected to the ground terminal and the high-voltage tail of the test transformer; the input terminal of the test transformer is connected to the test circuit; when the current in the test circuit exceeds the overcurrent setting value , the normally closed contact of the current relay is disconnected, and the console control test circuit is disconnected.

In this embodiment, the normally closed contact of the current relay is connected to the standby normally open points 37 and 38 of the console, and the normally closed signal is changed to a normally open signal to be connected to the opening coil of the input switch cabinet through the following procedure.

Program 1, if((g_Btn_a[GUOLIUXH-1].bBtnVa==ON)||(g_Btn_a[BEIYONG2-1].bBtnVa==ON))//high voltage tail end overcurrent signal (backup signal 2) { SETBIT( g_ucGuZhang,2);SETBIT(g_ucGuZhang,4); g_Btn_a[GUZHANG-1].bLedVal = ON; //fault light always on} else { CLRBIT(g_ucGuZhang,2); CLRBIT(g_ucGuZhang,4); }.

Program if(g_ucGuZhang != 0) { if(g_guzhangstate==0) { g_Relay_a[RLYSCFZ-1].ucAct = CONNECT; g_guzhangstate=1; g_Relay_a[RLYSHENGY-1].ucAct =RELEASE;g_Relay_a[RLYJIANGY-1]. ucAct = CONNECT; g_ucAUTOFLAG = 1; } //Output opening first, then input opening if(g_guzhangstate1==0) { if(g_Btn_a[SCFZXH-1].bBtnVa == ON){ g_Relay_a[RLYSRFZ-1]. ucAct = CONNECT; g_guzhangstate1=1; } }}

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art:

The power frequency withstand voltage testing device of the present invention can avoid equipment and personal accidents caused by failure of proper protection devices due to failure of electronic components.

The above-mentioned embodiments are only to illustrate the technical conception and characteristics of the present invention. Substantial equivalent changes or modifications shall fall within the protection scope of the present invention.

Claims (1)

1. a kind of industrial frequency withstand voltage test device, including experiment change, divider and console；The experiment becomes and divider is electrically connected It connects；The experiment change is electrically connected with test item；The divider is in parallel with test item；It is characterized in that：The console and examination It tests between becoming and is electrically connected with electric current relay；The normally-closed contact of electric current relay connects the spare opened point of console；By electric current relay The normally-closed contact of device is changed to the switching winding of normally opened signal access input switch cabinet；The ground terminal that electric current relay access experiment becomes With high pressure tail end；The input that the experiment becomes terminates test circuit；When the electric current in test circuit is more than over-current adjusting value, electricity The normally-closed contact of current relay disconnects, and console controls test circuit and disconnects.