1. Introduction to handheld transformer ratio tester
Handheld transformer ratio tester (Handheld Transformer Turn Ratio Tester), referred to as Transformation Ratio Tester, is a portable power test equipment, mainly used to detect the turns ratio of the high-voltage and low-voltage windings of the transformer to ensure that it meets the design standards. Ratio detection is the core link in transformer quality control and operation, and maintenance. According to IEC 60076 and IEEE C57.12.90 standards, the deviation should usually be controlled within ±0.5%.
2. Why use a Turn Ratio Tester?
In the power system, the correct ratio of the transformer determines whether the voltage output is stable. Once the ratio deviation is too large, it may lead to:
Abnormal grid voltage, affecting power supply safety
Misoperation of relay protection, causing power accidents
Winding damage, even causing equipment burnout
Therefore, regular ratio testing is a must for power companies and equipment manufacturers.
3. Advantages of handheld devices
Traditional transformation ratio testing relies on bulky transformation ratio bridges, which are complicated to operate and can only test single phases. The handheld Transformation Ratio Tester completely solves these problems and has the following advantages:
- ✔ Lightweight and easy to carry: weighing less than 3kg, a single person can complete the test
- ✔ Fast test speed: single-phase test time is less than 5 seconds, and the three-phase test is completed in one go
- ✔ High-precision measurement: the error can be controlled within ±0.1%
- ✔ Rich functions: support blind test, tap switch detection, group test, etc.
- ✔ Data storage and export: USB, U disk export, convenient digital management
4. PS-BB101A Handheld Three-Phase Transformation Ratio Tester (our company’s star product)
As a professional power test equipment manufacturer, Baoding Push Electric Manufacturing Co., Ltd. launched the PS-BB101A Handheld Three-Phase Transformation Ratio Tester, which is trusted by customers around the world and widely used in power companies, substations, and equipment manufacturers.
Core advantages:
Wide test range: 0.9~10000
Fast test speed: single-phase test completed within 5 seconds
Color LCD display: 240×128 high-definition interface, intuitive operation
Built-in lithium battery: light and long-lasting, suitable for outdoor testing
Safety design: reverse connection protection, short circuit protection
Large storage capacity: can save 850 sets of data, and supports USB export
Technical indicators overview:
| Item | Parameters |
| Test range | 0.9~10000 |
| Accuracy | 0.1% ± 2 digits |
| Output voltage | 160V automatic switching |
| Operating temperature | -10℃ ~ 40℃ |
| Power supply | Built-in lithium battery |
This Transformation Ratio Tester is particularly suitable for users who need efficient testing and precise measurement, replacing the traditional ratio bridge and greatly improving the test efficiency.
5. Main application scenarios
Factory inspection of transformer manufacturers
Daily inspection and maintenance of power companies
Pre-commissioning test of substations
Testing of transformers, dry-type transformers, oil-immersed transformers, etc.
6. Precautions for use
Before testing, the power must be turned off and discharged to ensure safety
Three-phase wiring must be correct (A/a, B/b, C/c correspondence)
When testing single-phase transformers, only connect the yellow and green wires
Avoid using in humid and highly corrosive environments
Summary
The handheld transformer ratio tester is an indispensable tool for modern power detection, which can achieve efficient, accurate and portable ratio testing. Choosing a reliable Transformation Ratio Tester can not only improve detection efficiency, but also ensure the safety of power grid operation.
If you are looking for high-performance and cost-effective testing equipment, please feel free to contact us for more details!