Dielectric Loss Test

With the development of China's electric power industry and the rapid growth in the number of distribution transformers in use, measuring transformer capacity and its actual losses has become an urgent need for power supply enterprises. Based on years of field experience combined with advanced digital technology, our company has meticulously developed a new type of transformer capacity tester suitable for field use - the MHY-13559 Transformer Capacity and No-Load/Load Loss Tester. This instrument is a specialized device for testing and verifying power transformers. It can automatically determine the capacity and type of the transformer based on test data, and judge whether the transformer is high energy-consuming or energy-saving according to the error between the transformer's characteristic parameters and national standards. It is suitable for detecting electricity theft and provides a fast and reliable detection method for electricity inspection departments. The MHY-13559 Transformer Capacity and No-Load/Load Loss Tester can test voltage levels of 6, 10, and 35 kV, with a capacity testing range from 30 kVA to 40000 kVA, for various models and specifications of oil-immersed transformers, dry-type transformers, and special transformers, measuring capacity, no-load loss, and load loss. The instrument uses low voltage and low current testing methods, enhancing the safety of testing operations. At the same time, the built-in power supply can provide a large output power, ensuring the accuracy of test data and providing a reliable signal for testing large-capacity transformers. This instrument is small in size, light in weight, simple in wiring, easy to operate, accurate in measurement, stable in performance, and easy to learn, making it an indispensable device for electricity inspection departments. 

·Functional Features 

1. No-load testing does not require an external power supply or voltage regulator; it can be completed using the built-in power supply.

2. For transformers without nameplates, no parameters need to be manually entered; the test results are automatically obtained.

3. Large screen, high brightness, full-temperature type liquid crystal display, all measurement data displayed on one screen, with Chinese information prompts. The LCD brightness and contrast are adjustable, and it can be clearly displayed even in strong light.

4. The tester has a built-in micro printer with Chinese character printing output, allowing test results to be printed directly on site.

5. Built-in protection circuit to avoid instrument damage and personnel accidents.

6. Uses long-life touch keys, easy to operate; most operations can use default settings, with one-key operation throughout.

7. The built-in high-energy power supply can complete all test items; during field testing, the instrument does not need external power supplies, voltage regulators, current boosters, or other auxiliary equipment.

8. Unique power-saving mode ensures completion of field testing of multiple transformers of various models.

9. Can test transformer capacity at non-rated tap positions.

10. Test data is stable with good repeatability.

11. Simple wiring; only two wiring clamps are needed to complete the test. The test does not distinguish phases; any two phases can be selected.

12. Test data can be uploaded to a PC, allowing the PC to print formal test reports and form a database for management. 

·Performance Specifications 

1. Capacity test: Range 30kVA to 500kVA, accuracy class 0.5,

Range 630kVA to 16000kVA, accuracy class 2

2. Load test: Short-circuit loss (copper loss): Range 0 to 40000W, accuracy class 0.5

Impedance voltage (Uk) and its percentage (Uk%), accuracy class 0.5

3. No-load test: No-load loss (iron loss): Range 0 to 40000W, accuracy class 0.5

No-load current, accuracy class 0.5

4. Other electrical measurements: Voltage range 0 to 750V, accuracy class 0.2; Current range 0 to 50A, accuracy class 0.2; Frequency range 45 to 65Hz, accuracy class 0.2. All the above measurements can be completed using the built-in power supply.

5. Automatically completes temperature compensation of test data, converting data to values at rated temperature.

6. Built-in power supply capacity: 15AH, can continuously test more than 100 transformers; output power 600W, can directly test large-capacity transformers such as 16000KVA.

7. The instrument provides test signals: AC voltage 40V, maximum current 15A, pure sine wave, distortion less than 1%.

8. Automatically determines and prints out the transformer type (high energy-consuming or energy-saving).

9. Has storage function, can store information of 100 transformers.

10. Equipped with special short-circuit clamps for testing, convenient wiring. For special requirements, a 1000A short-circuit plate can be optionally selected.

11. Insulation resistance between voltage and current input terminals and the machine case is ≥500MΩ, and the working power input terminal to the housing can withstand a power frequency 2KV, 1-minute AC withstand voltage test.

12. The instrument is small in size (400320180), light in weight (less than 6 kg), and easy to carry.

Working environment: Temperature -20 to 50°C, humidity 10% to 85%