CN212083530U - Improved high voltage electroscope - Google Patents

Abstract

An improved high-voltage electroscope comprises a casing; a contact electrode, which is arranged at the front end of the casing and is made of metal material, and is connected to the electroscope circuit through a wire; an insulating rod is arranged at the rear end of the casing; and a The electroscope circuit is arranged inside the shell, and it sequentially includes a self-checking switch, a high-voltage conversion module, a electroscope chip, a driving circuit module, a power indicating module, and an audible and visual alarm module, wherein the utility model provides The electroscope adds a loop test terminal, which is a metal sheet and is arranged on the surface of the casing. It is connected to the VCC terminal of the electroscope chip through a wire, so as to provide another reliable detection method for detecting whether the electroscope works well.

Description

Improved high voltage electroscope

technical field

The utility model relates to an on-line safety detection device of a high-voltage power system, in particular to an improved high-voltage electroscope.

Background technique

According to the provisions of 4.3.1 of the June 2013 revision of the "State Grid Corporation's Electric Safety Work Regulations", when the electroscope cannot be tested on electrical equipment, the power frequency high-voltage generator can be used to confirm that the electroscope is in good condition. However, the high-voltage generators currently used are large in size and high in voltage, which are inconvenient to carry and expensive when operating outdoors. And take the detection of 220KV electroscope as an example, the power frequency high-voltage generator needs to output 220KV×45% ("DL 740-2014" standard), which is equal to 99000V voltage, which is easy to cause secondary damage to operators due to high voltage.

In addition, only using the self-test switch of the electroscope itself cannot accurately judge whether the electroscope itself is in good condition. , away from the real working environment of the AC high-voltage electroscope, the accuracy of the high-voltage electroscope cannot be confirmed.

Utility model content

In order to solve the above-mentioned problems, the purpose of this utility model is to add a loop test terminal on the basis of the original electroscope, so that the electroscope can be tested only by using the electroscope tester to output a few volts during outdoor operation. In addition to no secondary injury to the operator, the detection also saves a lot of money for the power unit and improves social and economic benefits.

In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme to provide an improved high-voltage electroscope: it comprises a casing; a contact electrode is arranged at the front end of the casing and is made of metal material, which is connected to the electroscope circuit through wires; An insulating rod is arranged at the rear end of the casing; and an electroscope circuit is arranged inside the casing, including in sequence:

A self-test switch (S1), arranged on the surface of the casing, one end of the terminal is connected to the contact electrode and connected to the positive electrode (B+) of the battery through a resistor (R1), and the other end is connected to the negative electrode (B-) of the battery;

A high-voltage conversion module, connected in the electroscope circuit, includes a Zener diode (D) and a triode (Q1), wherein the base of the transistor (Q1) is connected to the anode of the Zener diode (D) and a resistor (R2), And connected to the contact electrode through a resistor (R5), the cathode of the Zener diode (D), the other end of the resistor (R2) and the emitter of the triode (Q1) are connected to the positive electrode (B+) of the battery, the triode (Q1) The collector is connected with the resistor (R6) and the capacitor (C1) in series and then connected to the negative electrode (B-) of the battery. ) is connected to the input terminals (2A, 2B) of the electroscope chip (U1) through a resistor (R7);

An electroscope chip (U1), the output terminal (3O) of which is connected to the base of the three-stage transistor (Q2) of the drive circuit module through a resistor (R16);

A driving circuit module, connected in the electroscope circuit, including a triode (Q2), the base of which is connected to the resistor (R16), the emitter is connected to the negative electrode (B-) of the battery, and the collector is used as the output of the driving circuit module end;

A power indicator module, arranged below the power display window of the casing and connected to the electroscope circuit, includes three battery power display lights (LED1, LED2, LED3) and three voltage detection chips (U1) with different voltage detection values. , U2, U3), wherein the anode of each battery power indicator is connected to the output terminal (O) of its corresponding voltage detection chip, and their cathodes are connected in parallel to the collector of the triode (Q2) through a resistor (R13). Electrode, the positive electrode of each voltage detection chip is connected to the positive electrode of the battery (B+), the negative electrode is connected to the collector of the triode (Q2), and a pull-up resistor (R9, R10, R11);

The sound and light alarm module is arranged below the aperture of the casing and connected to the electroscope circuit, which includes a buzzer (BEEP1) and an alarm display light (LED4), one end of the buzzer (BEEP1) and the alarm display light ( The anode of LED4) is connected to the positive electrode of the battery (B+), and the cathode series resistance (R14) of the alarm display light (LED4) and the other end of the buzzer (BEEP1) are connected to the collector of the triode (Q2);

Wherein, the electroscope circuit further comprises:

A loop test terminal, which is a metal sheet, is arranged on the surface of the casing, and is connected to the VCC terminal of the electroscope chip through a wire, that is, the terminal opposite to the polarity of the self-test switch.

When using the electroscope of the utility model to operate outdoors, a smaller 50HZ sine wave AC signal can be output through the detector with a smaller volume, so as to realize the inspection of the electroscope, improve the operability of the operator, and ensure the operator At the same time, because the detector is small in size and low in price, it saves a lot of money for power units and improves social and economic benefits.

Description of drawings

Fig. 1 is the electric schematic diagram of the utility model electroscope;

Fig. 2 is the appearance schematic diagram one of the utility model;

Fig. 3 is the appearance schematic diagram two of the utility model;

4 is a schematic diagram of the utility model using the loop test terminal to detect the electroscope.

Description of reference numerals: S1-self-test switch; BEEP1-buzzer; LED4-alarm display light; LED1, LED2, LED3-battery power display light; B+-battery positive pole; B--battery negative pole; D-zener diode ;R1-R16-resistor;C1,C2-capacitor;Q1,Q2-transistor;U2-voltage detection chip HT7050A;U3-voltage detection chip HT7040A;U4-voltage detection chip HT7030A;U1-electroscope chip CD4011;A,B - the output of the detector.

Detailed ways

Fig. 1 is the utility model electroscope principle diagram, according to Fig. 1 comprises in sequence:

A self-test switch (S1), arranged on the surface of the casing, one end of the terminal is connected to the contact electrode and connected to the positive electrode (B+) of the battery through a resistor (R1), and the other end is connected to the negative electrode (B-) of the battery;

A high-voltage conversion module, connected in the electroscope circuit, includes a Zener diode (D) and a triode (Q1), wherein the base of the transistor (Q1) is connected to the anode of the Zener diode (D) and a resistor (R2), And connected to the contact electrode through a resistor (R5), the cathode of the Zener diode (D), the other end of the resistor (R2) and the emitter of the triode (Q1) are connected to the positive electrode (B+) of the battery, the triode (Q1) The collector is connected with the resistor (R6) and the capacitor (C1) in series and then connected to the negative electrode (B-) of the battery. ) is connected to the input terminals (2A, 2B) of the electroscope chip (U1) through a resistor (R7);

An electroscope chip (U1), the output terminal (3O) of which is connected to the base of the three-stage transistor (Q2) of the drive circuit module through a resistor (R16);

A driving circuit module, connected in the electroscope circuit, including a triode (Q2), the base of which is connected to the resistor (R16), the emitter is connected to the negative electrode (B-) of the battery, and the collector is used as the output of the driving circuit module end;

A power indicator module, arranged below the power display window of the casing and connected to the electroscope circuit, includes three battery power display lights (LED1, LED2, LED3) and three voltage detection chips (U1) with different voltage detection values. , U2, U3), wherein the anode of each battery power indicator is connected to the output terminal (O) of its corresponding voltage detection chip, and their cathodes are connected in parallel to the collector of the triode (Q2) through a resistor (R13). Electrode, the positive electrode of each voltage detection chip is connected to the positive electrode of the battery (B+), the negative electrode is connected to the collector of the triode (Q2), and a pull-up resistor (R9, R10, R11);

The sound and light alarm module is arranged below the aperture of the casing and connected to the electroscope circuit, which includes a buzzer (BEEP1) and an alarm display light (LED4), one end of the buzzer (BEEP1) and the alarm display light ( The anode of LED4) is connected to the positive electrode of the battery (B+), and the cathode series resistance (R14) of the alarm display light (LED4) and the other end of the buzzer (BEEP1) are connected to the collector of the triode (Q2);

Wherein, the electroscope circuit further includes:

A loop test terminal, which is a metal sheet, is arranged on the surface of the casing, and is connected to the VCC terminal of the electroscope chip through a wire, that is, the terminal opposite to the polarity of the self-test switch.

In this embodiment, when the electroscope self-check switch is pressed, the triode (Q1) is turned on, and its collector outputs a high level so that 3O of the electroscope chip outputs a high level, and the triode (Q2) Turn on, the alarm display light (LED4) in the sound and light alarm unit lights up, the buzzer (BEEP1) sounds, and the electroscope self-test is successful. At the same time, the three battery power indicator lights (LED1, LED2, LED3) of the power indicator unit light up and display according to the battery voltage. If LED1, LED2 and LED3 are all lit up, it means that the power of the built-in battery of the electroscope is 100%. If the two power indicators LED2 and LED3 are lit, it means that the power of the built-in battery of the electroscope is 70%. If there is only one power indicator The light LED3 lights up, indicating that the built-in battery of the electroscope is 30%, which is in an undervoltage state, and the battery needs to be replaced.

When the self-check is successful and the built-in battery of the electroscope is normal, the electroscope needs to be verified on a line or equipment with the same level of voltage, or a power frequency generator is used to verify the electroscope. In this embodiment, the contact electrode is connected to the power frequency generator of the same level of voltage, the triode (Q1) is turned on, and its collector outputs a high level to make the 3O output of the electroscope chip (U1) High level, the tertiary tube (Q2) is turned on, the alarm display lamp (LED4) in the sound and light alarm unit is lit, the buzzer (BEEP1) sounds, and the confirmation is completed.

Figures 2 and 3 are schematic views of the appearance of the utility. According to Figures 2 and 3, they include: a casing; a contact electrode, which is made of metal at the front end of the casing, and is connected to the electroscope circuit through wires; an insulating The rod is arranged at the rear end of the casing; and an electroscope circuit is arranged inside the casing.

In this embodiment, another detection method for the electroscope is also provided, so as to realize the detection of the electroscope only by using a relatively small voltage when working outdoors.

4 is a schematic diagram of the utility model using the loop test terminal to detect the electroscope. As shown in FIG. 4 , the loop test terminal of the electroscope can be clamped to the loop test terminal and the detector through a loop clip with a wire. The AC output terminal (A) is connected, and the metal electrode of the electroscope is directly inserted into the output terminal (B) of the detector. The detector only needs to provide a 50HZ sine wave AC working voltage to the electroscope to make the electroscope chip in working state. The tertiary tube (Q1) can be turned on. At this time, 3O of the electroscope chip (U1) outputs a high level to drive the alarm display lamp (LED4) in the sound and light alarm unit to light up, and the buzzer (BEEP1) sounds. , the electroscope test is completed.

In an embodiment of the present invention, the electroscope can have different specifications by changing the type of electronic components (such as replacing resistors with different resistance values), so that the electroscope of the present invention can be used for 0.4KV, 0.4KV, 10KV, 35KV, 66KV, 110KV, 220KV, 330KV, 500KV, 750KV, these 9 voltage levels are tested.

To sum up, the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. Those of ordinary skill in the art should Modifications or equivalent replacements are all within the protection scope of the present invention.

Claims (1)

1. An improved high-voltage electroscope, comprising: a casing; a contact electrode, which is arranged at the front end of the casing and is made of metal material, and is connected to the electroscope circuit through a wire; an insulating rod is arranged at the rear end of the casing; and an electroscope circuit, which is arranged inside the casing and includes in sequence: A self-test switch (S1), arranged on the surface of the casing, one end of the terminal is connected to the contact electrode and connected to the positive electrode (B+) of the battery through a resistor (R1), and the other end is connected to the negative electrode (B-) of the battery; An electroscope chip (U1), the output terminal (3O) of which is connected to the base of the three-stage transistor (Q2) of the drive circuit module through a resistor (R16); A high-voltage conversion module, connected in the electroscope circuit, includes a Zener diode (D) and a triode (Q1), wherein the base of the transistor (Q1) is connected to the anode of the Zener diode (D) and a resistor (R2), And connected to the contact electrode through a resistor (R5), the cathode of the Zener diode (D), the other end of the resistor (R2) and the emitter of the triode (Q1) are connected to the positive electrode (B+) of the battery, the triode (Q1) The collector is connected with the resistor (R6) and the capacitor (C1) in series and then connected to the negative electrode (B-) of the battery. ) is connected to the input terminals (2A, 2B) of the electroscope chip (U1) through a resistor (R7); A driving circuit module, connected in the electroscope circuit, including a triode (Q2), the base of which is connected to the resistor (R16), the emitter is connected to the negative electrode (B-) of the battery, and the collector is used as the output of the driving circuit module end; A power indicator module, arranged below the power display window of the casing and connected to the electroscope circuit, includes three battery power display lights (LED1, LED2, LED3) and three voltage detection chips (U1) with different voltage detection values. , U2, U3), wherein the anode of each battery power indicator is connected to the output terminal (O) of its corresponding voltage detection chip, and their cathodes are connected in parallel to the collector of the triode (Q2) through a resistor (R13). Electrode, the positive electrode of each voltage detection chip is connected to the positive electrode of the battery (B+), the negative electrode is connected to the collector of the triode (Q2), and a pull-up resistor (R9, R10, R11); The sound and light alarm module is arranged below the aperture of the casing and connected to the electroscope circuit, which includes a buzzer (BEEP1) and an alarm display light (LED4), one end of the buzzer (BEEP1) and the alarm display light ( The anode of LED4) is connected to the positive electrode of the battery (B+), and the cathode series resistance (R14) of the alarm display light (LED4) and the other end of the buzzer (BEEP1) are connected to the collector of the triode (Q2); It is characterized in that, described electroscope circuit further comprises: A loop test terminal, which is a metal sheet, is arranged on the surface of the casing, and is connected to the VCC end of the electroscope chip (U1) through a wire, that is, the end opposite to the polarity of the self-check switch.

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