Common models of transformer testers vary depending on their function, mainly including DC resistance testers, turns ratio testers, capacity testers, and comprehensive testers, each with representative models.
DC Resistance Tester (used for winding resistance measurement)
HZ-10A: Portable design, supports 10A constant current output, suitable for testing large-capacity transformer windings.
QXZZ-10B: Integrated structure, features four-wire measurement and automatic discharge function, strong anti-interference.
JY44-10A: Highly efficient and accurate, commonly used in power maintenance sites, supports multiple current adjustment ranges.
TG-3960 Series (Beijing Sanxin): Includes basic, enhanced, and computer-controlled models, 100 times faster than bridge testers, with an accuracy of 0.1 class.
Turns Ratio Tester / Fully Automatic Turns Ratio Group Tester
NRBZC-III (Nanruo Electric): Supports 50Hz testing, automatically identifies wiring groups (1-12 points), and features high/low voltage reverse connection protection.
TTR300 Series (Megger): Three-phase transformer turns ratio tester, imported equipment, priced at approximately 600,000 RMB, suitable for high-precision testing.
LNBB-2000: New lithium battery powered model, supports turns ratio, group, and polarity testing, suitable for field operations.
Wuhan Chuangyi Electric Fully Automatic Turns Ratio Tester: Features blind testing function and CT turns ratio polarity testing expansion capability.
Transformer Capacity Tester / Characteristic Tester
LCT-CY300: Can measure the capacity of oil-immersed and dry-type transformers, supports passive measurement and built-in power supply.
DCRS-HI Model: Integrates capacity and loss parameter testing, developed according to DL/T standards.
Active Transformer Capacity Tester: Built-in three-phase sine wave power supply; can determine the actual capacity of transformers with missing nameplates.
NRRL-C Type: Used for no-load and load tests, measuring parameters such as no-load loss and short-circuit impedance.
Transformer Comprehensive Tester (Multi-functional Integration)
Hance Transformer Characteristic Comprehensive Tester (Wuhan HanCe Electric): Supports simultaneous three-phase measurement with an accuracy of 0.05%. Measures turns ratio, DC resistance, no-load/load loss, winding deformation, etc.
TH2840AX (Tonghui Electronics): Dual-CPU architecture; test speed up to 0.56ms; supports up to 288 test pins.
ZX2789 Series (Zhixin Precision): Frequency coverage 20Hz～1MHz; features complete transformer scanning test functionality.
WK-5237 (MICROTEST): Basic accuracy 0.1%; supports simultaneous testing of turns ratio, inductance, leakage inductance, and other parameters.
