Portable transformer loss test power box

Abstract

The utility model belongs to the technical field of transformer performance detection, and particularly relates to a portable transformer loss test power box which is characterized by comprising a suitcase shell, a panel and a three-phase compensation power capacitor, the panel and the three-phase compensation power capacitor are both accommodated in the suitcase shell, and the panel is connected with the three-phase compensation power capacitor. An input ammeter, an input voltmeter, an output ammeter, an output voltmeter, an input side connector socket and an output side connector socket are arranged on the panel; three groups of three-phase compensation power capacitors are arranged, and three fling-cut switches are correspondingly arranged on a panel; the input side connector socket is connected with a voltage regulator through a cable, and the output side connector socket is connected with a to-be-tested transformer through a cable. The beneficial effects of the utility model are that the portable box-type structure is adopted, which is convenient to carry and is especially suitable for the on-site loss test of a large-scale transformer; the switching type three-phase compensation power capacitor can be suitable for various transformer models and is high in universality; the method is very suitable for transformer loss batch test operation.

Description

Technical Field

[0001] This utility model belongs to the field of transformer performance testing technology, and in particular relates to a portable transformer loss testing power supply box. Background Technology

[0002] A transformer is a device that uses the principle of electromagnetic induction to change alternating current voltage. Its main components are the primary coil, secondary coil, and iron core (magnetic core). Its main functions include voltage transformation, current transformation, impedance transformation, isolation, and voltage stabilization (magnetic saturation transformer). Transformers can be classified according to their application as follows: distribution transformers, power transformers, fully sealed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, angle transformers, high-current transformers, and excitation transformers.

[0003] Transformer loss is a concept in modern physics, referring to the sum of no-load loss Po, short-circuit loss Pk, and stray loss Ps. When the rated voltage is applied to one winding of a transformer while the other windings are open circuits, the active power absorbed by the transformer is called no-load loss.

[0004] The transformer loss parameter tester is a device used for testing transformer loss parameters. It can measure parameters such as no-load loss, load loss, zero-sequence impedance, RMS voltage, average voltage, current, power, power factor, frequency, and low-voltage impedance of the main transformer (to check winding deformation).

[0005] Chinese invention patent application number 201710459672.2 discloses a simulated transformer training device, including high-voltage side terminals, low-voltage side terminals, a controller, a power supply module, a transformer capacity testing training module, and one or more of the following modules: transformer insulation resistance testing training module, transformer loss testing training module, transformer turns ratio testing module, and transformer DC resistance testing module. It allows users to visualize the external structure of a real transformer and performs transformer functions, enabling routine electrical tests and simulating various transformer functions. However, this device is not suitable for testing transformer losses at different voltage levels, lacking versatility. Utility Model Content

[0006] The purpose of this utility model is to provide a portable transformer loss testing power supply box, which overcomes the shortcomings of the existing technology. It adopts a portable box structure, is easy to carry, and is suitable for on-site loss testing of large transformers. The three-phase compensation power capacitor is applicable to various transformer models.

[0007] To achieve the above objectives, this utility model employs the following technical solution:

[0008] A portable transformer loss testing power supply box includes a carrying case shell, a panel, and three-phase compensation capacitors. The panel and the three-phase compensation capacitors are housed inside the carrying case shell. The panel is equipped with an input ammeter, an input voltmeter, an output ammeter, an output voltmeter, an input side wiring socket, and an output side wiring socket. There are three sets of three-phase compensation capacitors, and three corresponding switching switches are provided on the panel. The input side wiring socket is connected to a voltage regulator via a cable, and the output side wiring socket is connected to the transformer under test via a cable.

[0009] Furthermore, the specifications of the three-phase compensation power capacitors are 3kvar, 5kvar, and 10kvar.

[0010] Furthermore, the panel is equipped with a power socket and a grounding connector.

[0011] Furthermore, the input ammeter and output ammeter are model PA194I-9K4.

[0012] Furthermore, the input voltmeter and output voltmeter are model PZ194U-9K4.

[0013] Furthermore, the suitcase shell is provided with handles on both sides.

[0014] Furthermore, the applicable model of the transformer under test is 50-400kVA.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1) It adopts a portable box-type structure, which is convenient to carry and is especially suitable for on-site loss testing of large transformers;

[0017] 2) Switching three-phase compensation power capacitors are applicable to various transformer models and have strong versatility;

[0018] 3) The input and output wiring sockets are very convenient to connect to voltage regulators and transformers under test, making them suitable for batch testing of transformer losses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the panel arrangement in an embodiment of this utility model;

[0021] Figure 3 This is a schematic diagram of the main circuit connection in an embodiment of this utility model.

[0022] In the diagram: 1-Carrying case shell, 2-Panel, 3-Three-phase compensation power capacitor, 4-Power socket, 5-Grounding connector, 6-Input ammeter, 7-Input voltmeter, 8-Output ammeter, 9-Output voltmeter, 10-Input side wiring socket, 11-Output side wiring socket, 12-Voltage regulator, 13-Transformer under test, 14-Handle. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0025] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0026] See Figure 1-3 This is a schematic diagram of an embodiment of the portable transformer loss testing power supply box of this utility model. It includes a carrying case shell 1, a panel 2, and a three-phase compensation capacitor 3. Both the panel 2 and the three-phase compensation capacitor 3 are housed inside the carrying case shell 1. The panel 2 is equipped with an input ammeter 6, an input voltmeter 7, an output ammeter 8, an output voltmeter 9, an input-side wiring socket 10, and an output-side wiring socket 11. The panel 2 also has a power socket 4 and a grounding connector 5. Handles 14 are provided on both sides of the carrying case shell 1 for easy handling and movement.

[0027] The three-phase compensation capacitors 3 consist of three groups, with three corresponding switching switches on the panel 2. The specifications of the three-phase compensation capacitors 3 are 3kvar, 5kvar, and 10kvar, and their function is to compensate for the reactive current of the transformer under test. The input side wiring socket 10 is connected to the voltage regulator 12 via a cable, and its function is to adjust the transformer input voltage. The output side wiring socket 11 is connected to the transformer under test 13 via a cable. The applicable model of the transformer under test 13 is 50-400kvar. The input ammeter 6 and output ammeter 8 are model PA194I-9K4. Their function is to monitor the current on the input and output sides. The input voltmeter 7 and output voltmeter 9 are model PZ194U-9K4. Their function is to monitor the voltage on the input and output sides.

[0028] In this embodiment of the invention, the input-side wiring socket 10 is connected to a 380V AC power supply, the power socket 4 is connected to a 220V AC power supply, and the output-side terminals are connected to a transformer no-load loss tester, which is connected to the transformer under test. After the device is powered on, capacitors of different specifications are selected and connected according to the magnitude of the output current to reduce the input-side current and ensure that the output-side current and voltage meet the transformer test requirements.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A portable transformer loss testing power supply box, characterized in that, The device includes a carrying case shell, a control panel, and three-phase compensation capacitors. The control panel and the three-phase compensation capacitors are housed inside the carrying case shell. The control panel is equipped with an input ammeter, an input voltmeter, an output ammeter, an output voltmeter, an input-side wiring socket, and an output-side wiring socket. There are three sets of three-phase compensation capacitors, and the control panel has three corresponding switching switches. The input-side wiring socket is connected to a voltage regulator via a cable, and the output-side wiring socket is connected to the transformer under test via a cable.

2. The portable transformer loss testing power supply box according to claim 1, characterized in that, The specifications of the three-phase compensation power capacitors are 3kvar, 5kvar, and 10kvar.

3. The portable transformer loss testing power supply box according to claim 1, characterized in that, The panel is equipped with a power socket and a grounding connector.

4. The portable transformer loss testing power supply box according to claim 1, characterized in that, The input ammeter and output ammeter are model PA194I-9K4.

5. The portable transformer loss testing power supply box according to claim 1, characterized in that, The input voltmeter and output voltmeter are model PZ194U-9K4.

6. The portable transformer loss testing power supply box according to claim 1, characterized in that, The suitcase has handles on both sides of its outer shell.

7. The portable transformer loss testing power supply box according to claim 1, characterized in that, The applicable model of the transformer under test is 50-400kVA.

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