The HZBB-II Transformer Turns Ratio Tester is a low-cost, high-performance instrument designed for measuring the turns ratio and voltage ratio of power transformers. During the production of semi-finished and finished power transformers, before new transformers are put into operation, and in accordance with the preventive test procedures of the State Grid, it is required to periodically test the turns ratio or voltage ratio of running transformers.

Traditional ratio bridges are cumbersome to operate, their readings are not intuitive, and necessary conversions are required. Their test results only show the ratio value of one phase. The HZBB-II overcomes these shortcomings. It features a large high-resolution LCD screen, a lithium battery power supply for convenient on-site use, and English menu prompts for simple and intuitive operation. It completes three-phase ratio tests in one go with high speed and accuracy.

• Resists high heat, humidity, and salt spray for tropical island use
• Runs stably at -40°C, cold-proof and anti-condensation
• IEC compliant, with complete calibration certificates provided
• Local support: spares, on-site training, and instrument calibration

1. AC/DC dual-purpose operation.
2. A single charge allows continuous measurement of the turns ratio of 100 transformers.
3. Intelligent charging management.
4. Full three-phase sine wave inverter output.
5. Testing functions for three-phase transformers, single-phase transformers, PT, and Z-Type transformers: ratio, group, and polarity testing.
6. Blind test function.
7. CT ratio and polarity testing function.
8. Angle difference testing function for single-phase testing.
9. Tap position testing with a wide test range.
10. High/low voltage reversal protection.
11. Output short circuit protection function.