Transformer Turns Ratio Tester
The ZWBB201 is an intelligent, high-speed Transformer Turns Ratio (TTR) tester equipped with a powerful ARM processor and a built-in 3-phase signal source.
It automatically identifies connection groups and calculates ratio errors in just 3 seconds, all operated via an intuitive 7-inch full-color touch screen.
Product Overview
The ZWBB201 Multi-function Ratio Analyzer is designed in strict compliance with IEC 60076-1 standards for power transformers.
Ideal for single-phase, three-phase transformers, and PTs, it utilizes a proprietary algorithm to accurately measure turns ratio without requiring strict 3-phase power balance.
Its compact and lightweight design (only 4.5kg) makes it perfectly suited for both field diagnostics and factory testing.
Functions and Value:
1. Ultra-Fast Automatic Testing: Complete 3-phase turns ratio, vector group identification, and error calculation automatically within just 3 seconds—no manual calculation or complex parameter setups required.
2. Blind Testing Capability: If the transformer’s connection group is unknown, the instrument can automatically analyze and determine the correct vector group and polarity.
3. Advanced Signal & Waveform Analysis: Generates single, two, or 3-phase standard sine wave signals internally. It also dynamically displays primary and secondary voltage waveforms and performs harmonic analysis up to the 32nd order.
4. Smart Tap Changer Tracking: Automatically tracks the position of on-load tap changers and precisely indicates the current tap point during testing.
5. Robust Data Handling: Built-in memory stores extensive test records. Data can be seamlessly exported to a USB flash drive in a format directly compatible with MS Excel for quick report generation.
6. Excitation Current Reference: Safely applies up to 160V AC output to measure the excitation current, providing engineers with valuable preliminary data to assess the condition of transformer cores and windings.
Technical Details
| Parameter | Specification |
|---|---|
| Model | ZWBB201 |
| Ratio Measurement Range | 0.8 - 20000 |
| Accuracy (0.8 - 1000) | 0.1% |
| Accuracy (1000 - 5000) | 0.2% |
| Accuracy (5000 - 20000) | 0.3% |
| Output Voltage | AC 12V - 160V |
| Display | 7-inch color touch screen |
| Data Export | USB (Excel-compatible Dbase3 format) |
| Built-in Printer | Thermal micro-printer |
| Power Supply | AC 100-240V ±15% |
| Working Temperature | -10℃ to 50℃ |
| Dimension | 320mm × 230mm × 140mm |
| Weight | 4.5 kg (excluding test lines) |
Model Selection Guide
| Feature | ZW5320 | ZW8320 |
|---|---|---|
| Max Output Current | 20A | 20A |
| Max Resistance Range | Up to 200Ω | Up to 25kΩ (Includes 10mA, <1mA steps) |
| 3-Phase Auto Test | Supported | Supported |
| Auto Degaussing | Supported | Supported |
| Magnetic Assist | Not available | Supported |
| Best Application | Standard distribution & medium power transformers. | Large power transformers requiring rapid LV winding tests. |
Recent Work
Parts List
| Item NO. | Max Current | Measuring Range | Main Features | Recommended Application |
|---|---|---|---|---|
| GDZR-10A | 10A | 100μΩ - 20KΩ | Portable, built-in discharge alarm | Small to medium distribution transformers |
| GDZR-20A | 20A | 10μΩ - 10KΩ | High-speed testing, heat dissipation | Medium-sized power transformers |
| GDZR-40A | 40A | 1μΩ - 2KΩ | Dual-channel measurement, high current | Large-scale power transformers |
| GDZR-40A | Three-Phase 10A | 100μΩ - 10KΩ | Three-phase simultaneous measurement | Yn-type transformers, time-saving |
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Certificate
Frequently Asked Questions
Contact our engineers for technical support and application guidance.
No. If you are unsure of the connection vector group, simply select “Unknown” on the interface. The ZWBB201 will automatically analyze the wiring and determine the correct group and polarity.
Thanks to the advanced ARM processor and our proprietary dual-algorithm, a complete multi-phase ratio and vector group test takes approximately 3 seconds.
The device features a built-in thermal printer for instant field receipts. You can also export the database to a standard USB flash drive. The exported files are in Dbase3 format, which can be directly opened, edited, and printed using Microsoft Excel.
No. The displayed excitation current is measured under the instrument’s test voltage (up to 160V AC), not the transformer’s full rated voltage. It is provided as a highly useful preliminary reference to help detect core faults or short-circuited turns, but it does not replace a standard no-load test.
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