Transformer Capacity Load No Load Tester

Transformer Capacity Load No-load Tester is specially used for measuring the capacity of distribution power transformer, measuring the no-load and short-circuit loss of transformer, and has the function of harmonic analysis, which is convenient for analyzing the quality of on-site power network. Transformer Capacity Load No-load Tester can automatically check whether the wiring is correct and display the vector diagram of the three-phase current and voltage when testing the three-phase transformer. At the same time, necessary correction (such as waveform correction, temperature correction, unrated voltage correction, calibration, unrated current correction) is introduced to make the test results more accurate.

• Measure the no-load current and no-load loss of the transformer; Short circuit voltage, short circuit (load) loss, capacity.
• Experimental method: Three tables.
• Transformer Capacity Load No-load Tester can automatically check whether the wires are connected correctly and display vector diagrams of three-phase current and voltage when testing three-phase transformers.
• A single machine can perform load tests on substation transformers below 1600KVA; It is possible to perform load testing on substation transformers with 1/3 of the rated current below 2500KVA (if the rated current is below 1/3 of the rated current, Transformer Capacity Load No-load Tester can be converted into load loss parameters)
• All relevant test results will be automatically corrected. Transformer Capacity Load No-load Tester can automatically perform non rated current corrections such as waveform correction, temperature correction, non rated voltage correction, and calibration, making the test results more accurate.
• 6.320x240 LCD display, user-friendly human-machine interface, brightness control, suitable for all seasons.
• Equipped with an electronic clock that automatically records data and time, which is beneficial for saving and managing test results.
• Panel printers can print test results on site.
• Data (sample settings, test results, measurement time) can be saved and viewed in the event of a power outage. It can store 500 sets of test results and can be connected to a computer for data transmission.
• Allow external connection of CT and PT for extended measurement, which can test any parameter of the sample.

The Transformer Capacity Load No-load Tester is an indispensable multifunctional and intelligent on-site testing equipment in the power system. It accurately measures core characteristic parameters such as no-load loss, load loss, and impedance voltage of transformers, which can not only effectively determine the actual capacity of transformers (for verification and anti electricity theft), but also serve as an important tool for evaluating transformer energy efficiency, inspecting manufacturing quality, diagnosing internal faults, and conducting preventive maintenance. Its application runs through the entire lifecycle of transformer manufacturing, installation, operation, maintenance, and retirement, and is of great significance for ensuring the safe and economic operation of the power grid, promoting energy conservation and emission reduction

1.The electricity inspection, measurement, and testing department of the power company (power supply bureau).
2.The power department and equipment management department of large industrial and mining enterprises.
3.The quality inspection department of the transformer manufacturing plant.
4.The testing team of the power installation engineering company.
5.Third party testing and certification organizations.
6.Research institutes.

1.Boot no display: first off, open the socket on the back panel AC 220V fuse box, check the fuse box, you can replace insurance.
2.The screen suddenly black screen: press the reset button, to start measurement.
3.Measurement and computation results are not correct: Check the external wiring, whether by manual operation, whether bad or take the wrong line; relevant parameter is incorrect.
4.Measuring voltage and current display to zero the normal, check whether the current file fuse blown

The company sold the product warranty for one year, five years, responsible for the maintenance(warranty period of the instrument users to the date of purchase), free maintenance during the warranty period, maintenance fees collected only during the period, the user requires after-sales service call Hotline 15307172868.

• The failure or damage caused by user's drop during use or handling.
• The failure or damage caused by user's maintenance with other units.
• The failure or damage caused by the abnormal voltage.
• The failure or damage caused by the force majeure (such as fire, flood, natural disasters, etc.).
• The failure or damage caused by the do not follow the requirements of this manual, free to connect to other devices.
• No warranty card, and because the equipment could not confirm the defective product under warranty

1. During the measurement process, be sure not to touch the metal parts of the test line to avoid being damaged by electrical shock.

2. When measuring wiring, it is necessary to strictly follow the instructions, otherwise the consequences will be borne by oneself.

3. Before testing, it is necessary to carefully check whether the set parameters are correct.

4. It is best to use a grounded power socket.

5. Cannot operate under excessive voltage and current limits.

6. During the short-circuit test, the short-circuit on the non pressurized side must be in good condition, otherwise it will affect the test results.

7. When conducting a short-circuit test, if a ring current transformer is installed in the high-voltage or medium voltage side outlet bushing, the secondary of the current transformer must be short circuited before the test.

8. The test wiring work must be carried out with the tested circuit grounded to prevent induced voltage electric shock. All short circuits, grounding, and leads should have sufficient cross-sectional area and must be securely connected. The testing organization work should be rigorous and communication should be smooth to ensure the safe and smooth progress of the testing work.

9. When the remaining power of the instrument is less than 10%, it should be charged and fully charged each time; Try not to charge when there is still a lot of battery remaining to avoid affecting the battery life.

The Transformer Capacity Load No-load Tester operates by applying a reduced voltage or current to the transformer's low-voltage side and using mathematical extrapolation to calculate full-rated parameters. For the no-load test, it injects a low voltage (typically 30-50V at 50/60Hz or a variable frequency) into the low-voltage winding while the high-voltage side remains open, measures the actual no-load current and power (iron loss), then scales the results to the rated voltage using the transformer's equivalent circuit model. For the load test, it short-circuits the low-voltage side, injects a small current (1-10% of rated current) into the high-voltage side, measures the impedance voltage and copper loss, and extrapolates to 100% rated current. For capacity measurement, the tester automatically determines the unknown transformer's rating by comparing the measured no-load and load parameters against built-in standard databases. All calculations are performed by a built-in microprocessor, which compensates for temperature, corrects to the reference temperature (usually 75°C or 120°C), and outputs a pass/fail report without requiring external high-power supplies or heavy loading equipment.

When you choose us, you choose a partner with extensive export experience spanning nearly 100 countries across Southeast Asia, the Middle East, the Americas, and beyond. We understand the challenges of international logistics, documentation, and compliance, and we handle them smoothly so you can focus on your projects. Our factory and office environment are designed for efficiency and quality-clean, well-organized, and equipped with advanced manufacturing and testing systems. Walk through our facility (virtually or in person), and you will see the discipline and care that goes into every tester we build. We back our hardware with fast, responsive service: a quotation in under one hour, a technical solution within 24 hours, and a product demo to prove performance. During production, we strictly follow the contract, provide regular progress updates, and ship on time. After delivery, we offer a 12-month warranty, overseas training, authorized calibration (optional), rental services, and regular return visits. Need a custom solution? Our R&D and QC teams are ready to work with you. All of this is delivered at a competitive price-because we believe long-term trust matters more than short-term profit.

Hot Tags: transformer capacity load no load tester, China transformer capacity load no load tester manufacturers, suppliers, factory