CN203103907U - An electric shock controller for experimental electrical equipment - Google Patents

Abstract

The utility model discloses an electrical shock controller for experimental electrical equipment. The electrical shock controller is serially connected between experimental equipment and a power supply access end. The device can detect whether a circuit of the experimental electrical equipment is overloaded through a negative resistance light emitting diode, and control and regulate the connection and the disconnection of a relay and control the switching-on and switching-off statuses of a triode, so as to protect the experimental electrical equipment. The electrical shock controller is simple in structure, reliable to operate, comprehensive to protect, convenient to regulate, sensitive to respond and long in service life, and integrates functions of overload protection, short circuit protection and other protection together.

Description

An electric shock controller for experimental electrical equipment

technical field

The utility model relates to an electric shock controller for experimental electrical equipment.

Background technique

The electric shock controllers of the experimental electrical equipment used in the market now have very limited protection capabilities for the experimental electrical equipment, and cannot effectively protect the experimental electrical equipment during high-voltage overload, and high-voltage overload often occurs when doing experiments. Therefore, the electric shock controller of the existing experimental electrical equipment cannot protect the circuit, so a practical and effective electric shock controller is needed to protect the experimental electrical equipment in the working circuit.

Contents of the invention

The purpose of the utility model is to protect experimental electrical equipment from being damaged due to short circuit, overload and the like.

The specific technical scheme of the utility model is as follows: an electric shock controller for experimental electrical equipment is connected in series between the experimental equipment and the power access terminal, and the electric shock controller includes a negative resistance light-emitting diode VD1, a triode VT, and a normally closed switch of the relay J. Contact J1-1, reset button AN, capacitor C1, load R1, load R2, a diode VD2 and relay J;

The input end of the reset button AN is connected to the positive terminal of the power supply, the output end of the reset button AN is connected to one end of the capacitor C1, the positive electrode of the negative resistance light-emitting diode VD1, one end of the relay J and The cathode of the diode VD2 is connected to one end of the normally closed contact J1-1;

The other end of the capacitor C1 is connected to the negative pole of the negative resistance light-emitting diode VD1, one end of the load R1, and one end of the load R2;

The other end of the load R1 is connected to the power supply negative terminal and one end of the experimental equipment; the other end of the load R2 is connected to the base of the triode VT; the collector of the triode VT is connected to the The anode of the diode VD2 is connected to the other end of the relay J, the emitter of the triode VT is connected to the experimental equipment, the other end of the load R1, and the negative terminal of the power supply; the normally closed contact J1 The other end of -1 is connected with the other end of the experimental equipment.

The capacitor C1 is anti-electromagnetic interference, and is selected within the range of 0.01-0.1uF.

Technical effect: The utility model provides a kind of electrical equipment to prevent the damage of the experimental electrical equipment based on the overload of the experimental electrical equipment. It controls the conduction and Then, the relay J is triggered to act, and the power supply to the experimental electrical equipment is cut off, so as to achieve the purpose of protection.

At the same time, when the external voltage returns to below the critical value of the voltage, press the reset button AN once, so that the negative resistance light-emitting diode VD1 is cut off, the triode VT is cut off, the relay J is released, and the power supply to the load is resumed.

The utility model has the advantages of simple structure and convenient installation, and can be used for any experimental electrical equipment to protect different electrical appliances.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

The utility model is described in conjunction with Fig. 1: when the external voltage does not exceed the critical value of the set voltage, the negative resistance light-emitting diode VD1 is cut off, the triode VT is also cut off because there is no base current, the relay J does not pull in, and its normally closed contact The head J1-1 is closed to supply power to the load. When the external voltage exceeds the critical value of the set voltage, the negative-resistance light-emitting diode VD1 turns on from cut-off, and the negative-resistance light-emitting diode VD1 lights up to indicate voltage overvoltage, and the current flowing through the negative-resistance light-emitting diode VD1 provides the base of the transistor VT Current, the triode VT conducts, the relay J pulls in, the normally closed contact J1-1 disconnects, cuts off the power supply of the load, and plays a protective role. When the external voltage returns to below the critical value of the voltage, press the reset button AN to cut off the negative resistance light-emitting diode VD1, the triode VT, release the relay J, and restore the power supply to the load; the capacitor C1 connected in parallel with the negative resistance light-emitting diode VD1 is Anti-electromagnetic interference can be selected within the range of 0.01-0.1uF.

Among them, reset button AN and negative resistance light-emitting diode VD1, triode VT-9013, normally closed contact J1-1, capacitor C1 (0.1μF), load R1 (1kΩ), load R2 (10kΩ) and a diode VD2-1N4148 and relay Phase J is connected in series, capacitor C1 is connected in parallel with negative resistance light-emitting diode VD1, diode VD2-1N4148 is connected in parallel with relay J, load R1 (1kΩ), load R2 (10kΩ) and triode VT-9013 are connected in parallel, capacitor C1, negative resistance emits light Diode VD1 is connected in series with load R1 (1kΩ), diode VD2-1N4148 and relay J are connected in series with transistor VT-9013.

Claims (2)

1. An electric shock controller for experimental electrical equipment, which is connected in series between the experimental equipment and the power access terminal, characterized in that: the electric shock controller includes a negative resistance light-emitting diode (VD1), a triode (VT), and a relay (J) Normally closed contact (J1-1), reset button (AN), capacitor (C1), load (R1), load (R2) and a diode (VD2); The input terminal of the reset button (AN) is connected to the positive terminal of the power supply, and the output terminal of the reset button (AN) is connected to one terminal of the capacitor (C1) and the positive terminal of the negative resistance light-emitting diode (VD1) . One end of the relay (J) is connected to the cathode of the diode (VD2) and one end of the normally closed contact (J1-1); The other end of the capacitor (C1) is connected to the cathode of the negative resistance light-emitting diode (VD1), one end of the load (R1), and one end of the load (R2); The other end of the load (R1) is connected to the negative terminal of the power supply and one end of the experimental equipment; the other end of the load (R2) is connected to the base of the triode (VT); the triode ( The collector of VT) is connected to the anode of the diode (VD2) and the other end of the relay (J), and the emitter of the triode (VT) is connected to the experimental equipment and the other end of the load (R1). 1. The negative terminal of the power supply is connected; the other end of the normally closed contact (J1-1) is connected with the other end of the experimental equipment. 2. An electric shock controller for experimental electrical equipment according to claim 1, characterized in that: the capacitor (C1) is anti-electromagnetic interference, and is selected within the range of 0.01-0.1uF.

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