Low voltage short-circuit impedance measurement is a basic item in routine testing projects. By comparing the short-circuit impedance values measured before and after the transformer is subjected to short-circuit current impact, the degree of winding deformation can be preliminarily estimated based on the magnitude of its change. The impedance change between the transformer and the low voltage short-circuit test after short-circuit current surge should not exceed 2%.
Low voltage short-circuit impedance test is a direct method to identify whether the winding of a transformer is deformed after being impacted by 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.
The transformer low-voltage short-circuit impedance tester launched by Yangzhou Topu Electric Technology Co., Ltd. does not require an external voltage regulator. With one wiring, only input parameters to automatically perform three-phase testing and calculate impedance error percentage. The test results are very intuitive and it is a fast detection device for on-site testing of transformer winding deformation.
Usage characteristics
1. Using AC220V low-voltage power supply, automatically apply current to the AB, BC, and CA high-voltage windings of the transformer, synchronously collect data, automatically calculate impedance error percentage, and provide intuitive test results.
2. This instrument can be wired in one go and automatically complete three-phase testing without reversing the test wire.
3. The instrument can be used for single-phase testing or three-phase testing; It can be tested manually or automatically.
4. Equipped with output current limiting function, suitable for any impedance of the test sample.
5. Without the need for an external voltage regulator, the tested product can be measured.
6. It has the function of measuring zero sequence impedance.
7. It has the function of measuring inductance.
8. Large screen LCD display, Chinese menu, easy to operate, follow the prompts on the screen to complete the operation.
9. Capable of printing and storage; High testing accuracy, high level of automation, small size, light weight and other characteristics.
technical indicators
1. Voltage measurement range: 5-400V
2. Current measurement range: 0.1-20A
3. Measurement accuracy: 0.2 level
4. Working power supply: AC 220V ± 10%
5. Power frequency: 50Hz
6. Environmental temperature: -10 ℃ to 50 ℃
7. Environmental humidity: ≤ 85% RH

Top Electric's main equipment:

Complete set of equipment for frequency conversion series resonance test, DC high voltage generator, SF6 gas micro water meter, SF6 gas leak detector, SF6 gas purity tester SF6 gas comprehensive tester, SF6 density relay calibrator, test transformer (power frequency withstand voltage test device), frequency conversion anti-interference high-voltage dielectric loss tester, triple frequency generator (induction withstand voltage test device), double frequency generator set, AC/DC voltage divider (high voltage measuring instrument), high current generator (converter), transformer DC resistance tester, transformer ratio tester, transformer capacity characteristic tester, transformer no-load short circuit tester, transformer on load tap changer tester, transformer winding deformation tester, transformer characteristic comprehensive test bench, transformer core grounding current tester, microcomputer relay protection tester (three-phase relay protection tester, six phase relay protection tester), transformer characteristic comprehensive tester (transformer volt ampere characteristic tester) Testing equipment) High voltage switch mechanical characteristic tester (circuit breaker characteristic tester), circuit resistance tester (contact resistance tester), zinc oxide lightning arrester tester, transmission line parameter tester, capacitance and inductance tester, grounding resistance tester, insulation resistance tester (megohmmeter), insulation oil dielectric strength tester (insulation oil withstand voltage tester), insulation oil chromatograph, insulation boot (glove) withstand voltage test device, power safety tool testing equipment, battery constant current discharge tester, mining cable fault tester, mining power detection equipment, oil analysis instrument, railway system detection instrument, intelligent solar photovoltaic junction box testerVacuum oil filter machineElectric heating appliances, insulation products, etc.

Information organization: Yangzhou Topu Electric Technology Co., Ltd