Alternating-to-straight portable testing device

Abstract

The utility model discloses a portable alternating current-to-direct current testing device, which is characterized in that an alternating current adjustable power supply is arranged inside an insulating shell, the alternating current adjustable power supply is connected with a testing loop, one end of the testing loop is connected with a 220V power supply through a three-phase plug, and the other end of the testing loop is connected with a load of a direct current system through a testing lead; the test loop comprises an anti-short-circuit resistor and an AC voltmeter, the anti-short-circuit resistor is connected in series with the AC adjustable power supply, and the AC voltmeter is connected in parallel with the anti-short-circuit resistor and the AC voltmeter; the anti-short-circuit resistor and the AC voltmeter are connected in series with the fuse and the switch The device solves the problems of risk of damaging direct current system equipment or causing short circuit grounding and insufficient detection precision in the prior art, can reduce on-site temporary measures, avoids the risk of equipment damage and short circuit grounding, is light, intelligent and convenient to carry, can quickly and safely complete the detection of the alternating current-to-direct current detection module, and improves the detection efficiency of the alternating current-to-direct current detection module. And the efficiency and the quality of the maintenance work are greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of electrical testing, in particular to a portable AC-DC testing device. Background Art

[0002] During power production, AC may enter the DC system and cause power accidents. Therefore, for newly built or renovated substations, the DC power system insulation monitoring device should have the function of measuring and alarming AC-DC faults. Therefore, an AC-DC detection module is produced to perform AC-DC detection. Before each use, the module needs to be tested for its functional integrity. However, there is currently a lack of safe, efficient and accurate technical means for functional testing of the module. The existing technology usually directly introduces an AC power supply on site, and after connecting a resistor in series to the circuit, as shown in the attached manual Figure 4 As shown, it is directly connected to the AC-DC crosstalk detection module for detection, but this detection method has the following disadvantages: it is necessary to take measures on site to lead out a temporary AC power supply, and a series resistor is also required, and finally it is connected to the existing load switch of the DC system, which not only has the risk of damaging the DC system equipment or causing a short circuit to ground; and the temporary measures cannot test the AC-DC crosstalk detection module with high accuracy.

[0003] Therefore, it is necessary to design a portable cross-channel test device to solve the above problems. Summary of the invention

[0004] The purpose of the utility model is to provide a portable AC-DC crosstalk test device to solve the problems of the prior art having the risk of damaging DC system equipment or causing short circuit and grounding, as well as insufficient detection accuracy. It can reduce temporary measures on site and avoid the risk of equipment damage and short circuit and grounding. It is light, intelligent, and easy to carry. It can quickly and safely complete the inspection of the AC-DC crosstalk detection module, greatly improving the efficiency and quality of maintenance work.

[0005] The technical solution adopted by the utility model is:

[0006] A portable AC-DC test device comprises an insulating shell, an adjustable AC power supply is arranged inside the insulating shell, the adjustable AC power supply is connected to a test circuit, one end of the test circuit is connected to a 220V power supply through a three-phase plug, and the other end is connected to a load of a DC system through a test wire.

[0007] Furthermore, the insulating shell adopts a box structure with a length of about 20 cm, a thickness of 20 cm, and a height of 15 cm.

[0008] Furthermore, the AC adjustable power supply uses a 220V single-phase auto-isolated AC adjustable power supply.

[0009] Preferably, the test circuit includes an anti-short-circuit resistor and an AC voltmeter, the anti-short-circuit resistor is connected in series with the AC adjustable power supply, and the AC voltmeter is connected in parallel with the anti-short-circuit resistor and the AC voltmeter.

[0010] Preferably, the anti-short-circuit resistor and the AC voltmeter are connected in series with the fuse and the switch.

[0011] Preferably, the test wire comprises a test live wire and a test neutral wire, and both the test live wire and the test neutral wire are connected with a standard test wire connector.

[0012] Preferably, the upper surface of the insulating shell has a plurality of openings, which respectively correspond to the display screen of the AC voltmeter, the voltage adjustment knob of the AC adjustable power supply, and the fuse and switch.

[0013] This patent can achieve the following beneficial effects:

[0014] The device can reduce temporary measures on site and avoid the risk of equipment damage and short circuit grounding. It is lightweight, intelligent, and easy to carry. It can quickly and safely complete the inspection of the AC-DC detection module, greatly improving the efficiency and accuracy of maintenance work, and solving the problems of the prior art that there is a risk of damaging DC system equipment or causing short circuit grounding, as well as insufficient detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the external front structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the external back structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the detection method of the prior art in the background technology of the utility model;

[0019] In the figure: insulating shell 1, AC adjustable power supply 2, voltage regulating knob 21, anti-short circuit resistor 3, AC voltmeter 4, display screen 41, insurance 5, test live wire 6, test neutral wire 7, switch 8, three-phase plug 9. DETAILED DESCRIPTION

[0020] Embodiment 1:

[0021] like Figure 1 As shown, a portable AC-DC test device includes an insulating shell 1, an AC adjustable power supply 2 is arranged inside the insulating shell 1, the AC adjustable power supply 2 is connected to a test circuit, one end of the test circuit is connected to a 220V power supply through a three-phase plug 9, and the other end is connected to a load of a DC system through a test wire.

[0022] Furthermore, the insulating housing 1 is a box structure with a length of about 20 cm, a thickness of 20 cm, and a height of 15 cm.

[0023] Furthermore, the AC adjustable power supply 2 uses a 220V single-phase auto-isolated AC adjustable power supply 2.

[0024] Preferably, the test circuit includes an anti-short-circuit resistor 3 and an AC voltmeter 4 , the anti-short-circuit resistor 3 is connected in series with the AC adjustable power supply 2 , and the AC voltmeter 4 is connected in parallel with the anti-short-circuit resistor 3 and the AC voltmeter 4 .

[0025] Preferably, the anti-short-circuit resistor 3 and the AC voltmeter 4 are connected in series with the fuse 5 and the switch 8 .

[0026] like Figure 3 As shown, preferably, the test lead includes a test live wire 6 and a test neutral wire 7, and both the test live wire 6 and the test neutral wire 7 are connected with a standard test wire connector; the three-phase plug and the test lead are both led out from the back opening of the insulating housing 1.

[0027] like Figure 2 As shown, preferably, the upper surface of the insulating housing 1 has a plurality of openings, which respectively correspond to the display screen 41 of the AC voltmeter 4, the voltage adjustment knob 21 of the AC adjustable power supply 2, the fuse 5 and the switch 8.

[0028] The working principle of this device is as follows:

[0029] When in use, the AC adjustable power supply 2 is powered by connecting to a 200V AC power supply through a three-phase plug, and then connected to the circuit load of the AC-DC detection module to be tested through a test wire; the voltage is adjusted by rotating the voltage adjustment knob 21 of the AC adjustable power supply 2, and whether the AC-DC detection module is functioning properly is judged by observing the value changes of the AC voltmeter 4.

[0030] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A portable cross-channel test device, characterized in that: The invention comprises an insulating shell (1), wherein an adjustable AC power supply (2) is arranged inside the insulating shell (1), and the adjustable AC power supply (2) is connected to a test circuit, one end of the test circuit is connected to a 220V power supply via a three-phase plug (9), and the other end is connected to a load of a DC system via a test wire.

2. A portable cross-channel test device according to claim 1, characterized in that: The test circuit includes an anti-short-circuit resistor (3) and an AC voltmeter (4). The anti-short-circuit resistor (3) is connected in series with the AC adjustable power supply (2), and the AC voltmeter (4) is connected in parallel with the anti-short-circuit resistor (3) and the AC voltmeter (4).

3. A portable cross-channel test device according to claim 2, characterized in that: The short-circuit protection resistor (3) and the AC voltmeter (4) are connected in series with the fuse (5) and the switch (8).

4. A portable cross-channel test device according to claim 1, characterized in that: The test lead comprises a test live wire (6) and a test neutral wire (7), and both the test live wire (6) and the test neutral wire (7) are connected to a standard test wire connector.

5. A portable cross-channel test device according to claim 3, characterized in that: The upper surface of the insulating housing (1) has a plurality of openings, which respectively correspond to the display screen (41) of the AC voltmeter (4), the voltage adjustment knob (21) of the AC adjustable power supply (2), the fuse (5) and the switch (8).

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