KDBR-N is an integrated transformer analyzer with a built-in precision 50Hz sine wave test power supply, eliminating the need for external generators and voltage regulators. Utilizing an ARM+FPGA architecture and RT-Thread operating system, it provides high-precision measurements through a 7-inch touchscreen interface. The built-in battery supports over 200 tests per charge, and comprehensive automatic calibration ensures measurement accuracy. Its compact and lightweight design makes it ideal for harsh field environments.

1. Utilizes an ARM+FPGA+ADC architecture and RT-Thread real-time operating system, ensuring system stability and high accuracy;
2. 7-inch high-brightness color LCD screen with touch interface, Chinese input, and icon-based menus;
3. Provides comprehensive electronic help, including illustrations and text descriptions for each operation;
4. Large-capacity internal memory can store 1000 test records; USB interface for PC data transfer;
5. Integrates wired (RS232) and wireless (Bluetooth, WiFi) communication options;
6. Supports remote firmware upgrades for future feature enhancements;
7. Real-time display of voltage and current waveforms in all test modes;
8. Single-screen display of voltage, current, frequency, power factor, active/reactive/apparent power;
9. Custom-designed low-voltage short-circuit leads allow for safe tool-free connection to transformer terminals;
10. Measures the capacity of various distribution and power transformers without external power supply;
11. Automatic correction: waveform distortion, temperature, and non-rated voltage/current (parameter input required);
12. Voltage range up to 1000V, current range up to 100A, with internal protection; no range switching errors;
13. The measurement range can be flexibly extended and measurement capabilities enhanced by connecting external voltage transformers (VT) and current transformers (CT);
14. The performance class of the three-phase oil-immersed transformer is automatically estimated based on test results.

1. Built in power output range:
Voltage: 0-10V
Current: 0-10A
2. Characteristic channel testing range and accuracy:
Voltage range: AC 1000V. Accuracy, ± 0.2% (F.S) ± 1 word
Current range: AC 100A. Accuracy, ± 0.2% (F.S) ± 1 word
3. Measurement accuracy of power and other indicators:
Power: ± 0.5% (F.S) (0.1 ≤ Cos Φ ≤ 1)
±1.0%（F.S）（0.02≤CosΦ≤0.1）
Measurement of empty (load) loss: ± 2% (0.1 ≤ Cos Φ ≤ 1)
4. Transformer capacity testing range: 6.3~125 000kVA
5. Working temperature: -20 ℃~+60 ℃
6. Charger power requirements: mains AC 160V~265V
7. Insulation degree:
⑴. The insulation resistance between the capacity test, voltage, and current input points and the casing is ≥ 100M Ω
⑵ The charging power input can withstand a power frequency of 2kV (effective value) between the chassis, with a test duration of 1 minute
8. Host volume: 32cm × 24cm × 13cm
9. Weight: 4kg (main unit)