Color touch screen transformer short-circuit impedance tester

Instrument Overview
Short circuit impedance is an important parameter of transformers, and the short-circuit impedance method is a traditional method for determining winding deformation. According to GB1094.5-2008 and IEC60076-5:2006, the change in short-circuit reactance is an important criterion for determining whether the transformer winding is deformed. Measuring the parameters of transformer windings is also an effective means of verifying the manufacturing process level of transformers and determining whether the transportation process has any adverse effects on transformer windings.
Low voltage short-circuit impedance test is a direct method to identify whether the winding of a transformer is deformed due to the impact of short-circuit current during operation or mechanical force during transportation and installation. It is of great significance for determining whether the transformer can be put into operation and is also one of the basis for determining whether disassembly inspection is required for the transformer.
Created by Yangzhou Topu Electric Technology Co., LtdColor touch screen transformer short-circuit impedance testerSuitable for low voltage load impedance testing of power transformers (single-phase or three-phase) during factory, major maintenance, pre testing, and handover testing. The basic principle of routine testing projects is to conduct short-circuit impedance (%) testing on power transformers on site and compare it with the nameplate value or factory value. It can detect defects such as winding displacement and deformation caused by serious fault currents during transportation, installation, and operation after factory testing.
thatColor touch screen transformer short-circuit impedance testerSuitable for low-voltage short-circuit impedance measurement of 35kV and above main transformers under on-site and laboratory conditions. The instrument adopts single-chip testing technology and digital signal processing technology internally, and the measurement data is accurate; The external display adopts a 7-inch touch color LCD screen, with a Chinese operation menu for more convenient touch operation. It is also equipped with a thermal printer and storage function for easy printing and storage of data. The data that needs to be exported can be transferred to the computer through USB; The instrument has a small volume, making it easy to use and carry on site; By inputting parameters, this instrument can perform single and three-phase tests and automatically calculate the percentage of transformer impedance error. The test results are intuitive and it is a fast detection instrument for on-site testing of transformer winding deformation.

Features
1. This instrument uses an AC 220V low-voltage power supply to apply current to the AB, BC, and CA windings of single-phase and three-phase transformers through manual and automatic modes. In addition to measuring the percentage of error between the short-circuit impedance of the transformer and the nameplate impedance, it can also measure the impedance, reactance, resistance, inductance, and other values of the transformer for user data comparison. The test results are intuitive.
2. The instrument can be used for single-phase testing or three-phase testing; It can be tested manually or automatically.
3. One time wiring can automatically complete three-phase testing without reversing the test wire.
4. Without the need for an external voltage regulator, the tested product can be measured.
5. The instrument not only displays the percentage of impedance error, but also shows the applied voltage, applied current, measured power, short-circuit impedance, short-circuit reactance, winding inductance, short-circuit impedance voltage, and other values.
6. Zero sequence impedance is suitable for transformers with neutral points in star shaped connections on the high voltage side. The instrument can simultaneously measure zero sequence impedance, zero sequence inductance, zero sequence resistance, and zero sequence inductance.
7. The instrument can adopt two power supply modes: internal power supply and external power supply.
8. The instrument is equipped with a 7-inch color touch LCD screen and a Chinese operation menu, making touch operation more convenient. It is also equipped with a micro printer that can print data in real time.
9. This machine can store 100 test records, with data storage indexed by test retention time.
10. The instrument comes with a clock function, and the time can be calibrated by itself.
11. Equipped with a USB interface, it can transfer test data to a USB drive.

Technical Specifications
1. Voltage measurement range: 15V~500V
2. Current measurement range: 0.5A-50A
3. Accuracy: Voltage error value:<0.2%
Current error value:<0.2%
Power error value: ＜ ± 0.5% (Cos Φ>0.1)
＜±1.0%（0.05＜CosΦ＜0.1）
Short circuit impedance error value: ＜ ± 0.5%
4. Impedance measurement range: 1 Ω~200 Ω
5. Working power supply: AC220V ± 10%
6. Power frequency: 50Hz ± 5Hz
7. Working temperature: -10~40 ℃
8. Environmental humidity: ≤ 80% RH, no condensation

Friendly reminder: When purchasing transformer testing equipment, choose products from direct manufacturers, as product quality and after-sales service are guaranteed!

Yangzhou Top Electric Technology Co., Ltd. Main Equipment:

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