Intelligent electric power over-current protector tester

Abstract

The utility model discloses an intelligent electric power over-current protector tester, which comprises an RL circuit, a transformation circuit is connected in parallel between the RL circuit and an original power supply, the RL circuit comprises a voltage test circuit, a current test circuit and combination switches, the voltage test circuit and the current test circuit are respectively connected with a first combination switch, and the first combination switch is connected with a second combination switch. The voltage test circuit comprises an alternating current voltmeter, the alternating current voltmeter is connected with the combination switch through a wire, the current test circuit comprises a capacitor, a load resistor, a diode I and a diode II, the diode I and the diode II form a closed loop branch I, the capacitor and the load resistor form a closed loop branch, and the capacitor and the load resistor form a closed loop branch II. The other end of the diode is connected with a first ampere meter. The utility model belongs to the technical field of testers, and particularly relates to an intelligent electric power over-current protector tester for separated protection through a voltage circuit and a current circuit.

Description

Technical Field

[0001] The utility model belongs to the technical field of testers, and particularly relates to a tester for an intelligent power overcurrent protector. Background Art

[0002] After retrieval, for example, a patent with the patent number CN103792445A discloses a fully intelligent power overcurrent protection tester, which includes an industrial control computer, a function / arbitrary waveform generator, a multi-relay control module, a signal feedback module, a digital multimeter that are respectively bi-directionally electrically connected to the industrial control computer, and a power supply module for supplying power to each module; one signal output end of the function / arbitrary waveform generator is directly electrically connected to a corresponding signal input end of the multi-relay control module, and the other signal output end is electrically connected to another corresponding signal input end of the multi-relay control module via a power operation amplifier circuit; the multi-relay control module is provided with two signal output ends that are respectively electrically connected to the signal input ends of the signal feedback module and the digital multimeter.

[0003] The problems existing in the above patent are as follows: At the present stage, the tester, through the industrial control computer, the function / arbitrary waveform generator, the multi-relay control module, the signal feedback module, the digital multimeter that are respectively bi-directionally electrically connected to the industrial control computer, and the power supply module for supplying power to each module, is extremely likely to cause damage to the test components when power overcurrent occurs. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is that when the existing equipment generates power overcurrent, it is extremely likely to cause damage to the test components.

[0005] In order to achieve the above functions, the technical solution adopted by the utility model is as follows: An intelligent power overcurrent protector tester includes an RL circuit, a voltage transformation circuit is connected in parallel between the RL circuit and the original power supply. The RL circuit includes a voltage test circuit, a current test circuit, and a combination switch. The voltage test circuit and the current test circuit are respectively connected to one of the combination switches. The voltage test circuit includes an AC voltmeter, and the AC voltmeter is connected to the combination switch through a wire. The current test circuit includes a capacitor, a load resistor, a diode one, and a diode two. The diode one and the diode two form a closed-loop branch one. The capacitor and the load resistor form a closed-loop branch and are connected in parallel with the closed-loop branch one. The other end of the diode is connected to an ammeter one.

[0006] Further, the voltage transformation circuit includes a contactor one, a contactor two, a voltage regulator one, a voltage regulator two, a variable resistor, and an ammeter two. The contactor one, the voltage regulator one, the voltage regulator two, and the contactor two form a closed-loop branch three. The variable resistor and the ammeter form a closed-loop branch four.

[0007] Further, a first fuse is connected in series between the AC voltmeter and the combination switch, a second fuse is connected in series between the first AC contactor and the original power supply, and a third fuse is connected in series between the second AC contactor and the original power supply.

[0008] Further, several groups of voltage test circuits are provided and are connected in parallel in pairs.

[0009] Further, several groups of current test circuits are provided and are connected in parallel in pairs.

[0010] Further, several groups of voltage transformation circuits are provided and are connected in parallel in pairs.

[0011] Further, the other end of the first fuse is connected to the zero potential reference point of the original power supply through a wire.

[0012] Further, the other ends of the first diode and the second diode are connected to the zero potential reference point of the original power supply through a wire.

[0013] Further, the other end of the ammeter is connected to the zero potential reference point of the original power supply through a wire.

[0014] After adopting the above structure, the beneficial effects of the present utility model are as follows:

[0015] (1) The setting of the separated test circuit separates the test of voltage and current, preventing the damage of test components caused by overcurrent.

[0016] (2) The setting of the voltage transformation circuit realizes the adjustable voltage transformation, facilitating the output of currents with various requirements. Description of the Drawings

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model.

[0018] Figure 1 It is a circuit schematic diagram proposed by the present utility model.

[0019] In the drawings: HK, combination switch; V1, AC voltmeter; C1, capacitor; Rm, load resistor; D1, first diode; D2, second diode; 1C, first AC contactor; 2C, second AC contactor; 1T, first voltage regulator; 2T, second voltage regulator; W, variable resistor; A, ammeter; 1RD, first fuse; 2RD, second fuse; 3RD, third fuse. Detailed Embodiments

[0020] As Figure 1As shown in the figure, an intelligent overcurrent protector tester for electric power includes an RL circuit. A voltage transformation circuit is connected in parallel between the RL circuit and the original power supply. The RL circuit includes a voltage test circuit, a current test circuit, and a combined switch HK. The voltage test circuit and the current test circuit are respectively connected to one of the combined switch HK. The voltage test circuit includes an AC voltmeter V1, and the AC voltmeter V1 is connected to the combined switch HK through a wire. The current test circuit includes a capacitor C1, a load resistor Rm, a diode D1, and a diode D2. The diode D1 and the diode D2 form a closed-loop branch one, and the capacitor C1 and the load resistor Rm form a closed-loop branch two, and are connected in parallel with the closed-loop branch one.

[0021] As Figure 1 shown in the figure, the voltage transformation circuit includes a contactor 1C, a contactor 2C, a voltage regulator 1T, a voltage regulator 2T, a variable resistor W, and an ammeter A1. The contactor 1C, the voltage regulator 1T, the voltage regulator 2T, and the contactor 2C form a closed-loop branch three, and the variable resistor W and the ammeter A1 form a closed-loop branch four.

[0022] Among them, a fuse 1RD is connected in series between the AC voltmeter V1 and the combined switch HK. A fuse 2RD is connected in series between the contactor 1C and the original power supply. A fuse 3RD is connected in series between the contactor 2C and the original power supply. The voltage test circuit is provided with several groups and is connected in parallel in pairs. The current test circuit is provided with several groups and is connected in parallel in pairs. The voltage transformation circuit is provided with several groups and is connected in parallel in pairs. The other end of the fuse 1RD is connected to the zero potential reference point of the original power supply through a wire. The other ends of the diode D1 and the diode D2 are connected to the zero potential reference point of the original power supply through a wire. The other end of the ammeter A1 is connected to the zero potential reference point of the original power supply through a wire.

[0023] During specific use, first, adjust the combined switch HK to close the voltage test circuit. The voltage test circuit measures the voltage in the circuit. When an overcurrent state occurs in the circuit, the fuse 1RD melts, and the voltage test circuit is disconnected to protect the components.

[0024] Next, adjust the combined switch HK to close the current test circuit. The alternating current is rectified by the diode D1 and the diode D2 to convert the alternating current into direct current. The closed-loop branch two composed of the capacitor C1 and the load resistor Rm is connected in parallel. When an overcurrent occurs in the current test circuit, the capacitor C1 charges and rectifies the overcurrent in the circuit.

[0025] Next, the current passes through the voltage transformation circuit. The operator can adjust the voltage regulator 1T and the voltage regulator 2T to adjust the voltage in the circuit, and the variable resistor W adjusts the voltage in the voltage transformation circuit to ensure the stable adjustability of the output current of the voltage transformation circuit.

[0026] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents. In general, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the creation of the present utility model, design similar structural forms and embodiments to this technical solution without creative efforts, they should all fall within the protection scope of the present utility model.

Claims

1. An intelligent overcurrent protector tester for electric power, characterized in that: It includes an RL circuit, and a voltage transformation circuit is connected in parallel between the RL circuit and the original power supply. The RL circuit includes a voltage test circuit, a current test circuit, and a combination switch. The voltage test circuit and the current test circuit are respectively connected to a combination switch. The voltage test circuit includes an AC voltmeter, and the AC voltmeter is connected to the combination switch through a wire. The current test circuit includes a capacitor, a load resistor, a diode one, and a diode two. The diode one and the diode two form a closed-loop branch one. The capacitor and the load resistor form a closed-loop branch and are connected in parallel with the closed-loop branch one.

2. The intelligent overcurrent protector tester according to claim 1, wherein: Several groups of the voltage test circuits are provided and are connected in parallel in pairs.

3. An intelligent power overcurrent protector tester according to claim 1, characterized in that: Several groups of the current test circuits are provided and are connected in parallel in pairs.

4. An intelligent power overcurrent protector tester according to claim 1, characterized in that: The other ends of the diode one and the diode two are connected to the zero-potential reference point of the original power supply through a wire.

5. An intelligent power overcurrent protector tester according to claim 1, characterized in that: The voltage transformation circuit includes a contactor one, a contactor two, a voltage regulator one, a voltage regulator two, a variable resistor, and an ammeter. The contactor one, the voltage regulator one, the voltage regulator two, and the contactor two form a closed-loop branch three. The variable resistor and the ammeter form a closed-loop branch four.

6. The intelligent power overcurrent protector tester according to claim 5, wherein: Several groups of the voltage transformation circuits are provided and are connected in parallel in pairs.

7. An intelligent power overcurrent protector tester according to claim 5, characterized in that: The other end of the ammeter is connected to the zero-potential reference point of the original power supply through a wire.

8. An intelligent power overcurrent protector tester according to claim 5, characterized in that: A fuse one is connected in series between the AC voltmeter and the combination switch. A fuse two is connected in series between the contactor one and the original power supply. A fuse three is connected in series between the contactor two and the original power supply.

Images