Transformer no-load load and capacity analyzer is a high-precision instrument used for measuring characteristic parameters such as transformer capacity, no-load, and load. This instrument is a multifunctional measuring instrument, equivalent to two traditional testing instruments: transformer capacity tester and transformer characteristic parameter tester. It can accurately measure a series of power frequency parameters such as capacity, type, no-load current, no-load loss, short-circuit (load) loss, impedance voltage, etc. of various transformers.


The KDBR-IV transformer capacity and no-load tester has many advantages such as small size, light weight, high measurement accuracy, good stability, and simple operation. It can replace the traditional method of measuring transformer loss and capacity using multiple meters, with simpler wiring, easier testing and recording, greatly improving your work efficiency.

1. It can accurately measure the capacity of various distribution transformers, which is convenient and accurate.
2. It can measure the no-load loss, no-load current, load loss, impedance voltage, effective voltage, average voltage, current, power, power factor, frequency and other parameter functions of transformers.
3. The instrument automatically switches ranges internally, allowing for a wide range of voltage and current measurements and simple wiring.
When conducting no-load and load tests on three-phase transformers, the instrument can automatically determine whether the wiring is correct and display vector diagrams of three-phase voltage and current.
5. It has the function of using single-phase test power supply for impedance measurement in phase separation
6. It has the function of directly and automatically measuring within the allowed measurement range of the instrument, and can be externally connected with a voltage transformer and a current transformer when it exceeds the measurement range
7. Equipped with automatic waveform distortion correction, voltage correction, current correction, and temperature correction functions
8. It has the function of manually setting the test current and frequency when measuring impedance voltage
9. It has the function of manually setting the test current and frequency when measuring no-load current
10. A single machine can measure the load experiment of distribution transformers below 1000KVA under full current; The measurement of load test for distribution transformers below 3150KVA can be completed at one-third of the rated current (the instrument can convert the load loss parameter to the rated current at one-third of the rated current).
11. Combined with external power supply and equipment for voltage regulation, voltage boosting, and current boosting, various transformer characteristic data such as no-load current, no-load loss, impedance voltage, and short-circuit (load) loss can be measured. The no-load current, no-load loss, impedance voltage, and load loss of various types of transformers can be measured.
In the measurement of transformer characteristics, the maximum voltage range can reach 750V, the maximum current range can reach 100A, and there is an internal protection circuit. When measuring, there is no need to switch gears to ensure measurement accuracy, and there is no need to worry about burning out the instrument due to incorrect gear selection
13. It can automatically perform waveform distortion correction, temperature correction, voltage correction (no-load test under non rated voltage), and current correction (load test under non rated current conditions). The operator only needs to input the correction index instrument according to the transformer type to automatically calculate the corrected result, which is suitable for units that do not have slightly larger capacity transformer short-circuit test conditions.
14. Based on the no-load and load losses in the test results, the performance level of three-phase oil immersed distribution transformers and electrical transformers can be automatically estimated for on-site reference by staff. Users can print out the test data at any time through a micro printer.
15. All test results are automatically calibrated accordingly. The instrument can automatically perform various calibrations such as waveform correction, temperature correction, non rated voltage correction, non rated current correction, etc., to improve the accuracy of test results.
16.320x240 large screen, high brightness LCD display, touch buttons for easier operation, wide temperature LCD with brightness adjustment, suitable for winter and summer seasons.
17. The instrument can preset 40 sets of test sample parameters by the user, and these parameters can be deleted and added at any time as needed, making it very convenient to use.
18. Comes with a real-time electronic clock that automatically records the date and time of the experiment, facilitating the storage and management of experimental results.
19. Panel type thermal printer, capable of quickly printing test results on site.
20. The data (sample settings, measurement results, testing time, etc.) has power-off storage and browsing functions, can store 500 sets of experimental results, and can be transmitted online with a computer.
21. It is allowed to use external voltage transformers and current transformers for extended range measurement, which can measure any parameter of the test sample.

1. Environmental conditions
Temperature: -5C~40C
Relative humidity:<95% (25C)
Altitude:<2500m
External interference: no particularly strong vibrations, no particularly strong electromagnetic fields
External power supply: 220VAC ± 10%, 45Hz~55Hz


2. Measurement range
Capacity: 30KVA to 65000KVA
Voltage: 0-750V, automatic range switching inside the instrument
Current: 0-100A, automatic range switching inside the instrument
Voltage testing range: Ua Ub、Uc、Up 0～750V， Accuracy: 0.2 level;
Current testing range: Ia Ib、Ic、Ip 0～100A， Accuracy: 0.2 level;


3. Testing accuracy
Voltage: 0-100V, ± 0.2% FS; 100～700V，±0.2%
Current: 0-10A, ± 0.2% FS; 10～100A，±0.2%
Power: ± 0.5% (Cos Φ>0.1), ± 1.0% (0.02<cos Φ<0.1)<span="" style="box sizing: border box; text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; margin: 0px; padding: 0px; outline: none; ">
Capacity testing: accuracy level 0.5;
Load loss: accuracy level 0.5;
Impedance voltage: Uk and its percentage Uk% Accuracy: Level 0.5;
No load loss: accuracy level 0.5;
No load current: accuracy level 0.5;


4. Insulation strength
The insulation resistance between the voltage and current input terminals and the casing is ≥ 100M Ω.
The working power input terminal is subjected to a power frequency of 2KV (effective value) between the casing for 1 minute during the experiment.


5. Other indicators
Frequency: 45Hz~65Hz
Dimensions: 400 × 300 × 220mm
Weight: 12Kg (excluding test line)