3 Phase Transformer Turns Ratio Tester | VS-6628
Products Details
Weshine Electric develops the VS-6628 3 Phase Transformer Turns Ratio Tester for transformer ratio testing, vector group identification, and electrical parameter verification across power systems. As a core solution in modern high-voltage diagnostics, this unit integrates seamlessly alongside our broad range of transformer test equipment to support high-precision measurement powered by full three-phase sine wave inverter output. To improve overall test stability, the system incorporates automatic voltage adjustment along with soft start and soft stop control technology.
The VS-6628 features advanced blind testing capability, enabling accurate turns ratio and vector group measurements without requiring prior knowledge of internal transformer wiring connections. The versatile system fully supports testing for potential transformers (PT), current transformers (CT), single-phase transformers, three-phase transformers, and Z-type transformers.
Designed for seamless data management, the device integrates Bluetooth wireless communication, an RS232 interface, and USB data export functionality. The internal memory supports storage for up to 200 test records, while USB output enables direct export in Word format for convenient field report editing and documentation.
System Specifications
| System Specifications | |
| Parameter | Specification |
| Ratio Measurement Range | 0.9 – 10000 |
| Accuracy | ±(0.1% reading + 2 digits ≤500) |
| ±(0.2% reading + 2 digits ≤3000) | |
| ±(0.3% reading + 2 digits >3000) | |
| Resolution | 0.0001 – 1 (multi-range) |
| Test Voltage | Up to 200VAC |
| Output System | Three-phase sine wave inverter |
| Display | 7-inch color LCD touch screen |
| Data Storage | 200 test records |
| Communication Interface | RS232 / Bluetooth |
| Data Export | USB (Word format support) |
| Power Supply | 100–240VAC / Built-in lithium battery |
| Operating Temperature | -10°C to 50°C |
| Humidity | ≤90% non-condensing |
| Dimensions | 330 × 280 × 150 mm |
Product Guide
Operators connect the high-voltage and low-voltage terminals according to the specific transformer configuration. In blind test mode, the system automatically detects the connection mode without manual input. The instrument completes ratio measurement, vector group identification, and polarity analysis within a single operation cycle.
Following measurement completion, operators can export test data via USB drive or wireless connection for quick report generation and analytical review.
Applications & Use Cases
Application Scenarios
Weshine Electric applies the VS-6628 across transformer manufacturing, power system commissioning, substation maintenance, and electrical equipment inspection. The device effectively supports routine testing and fault diagnosis for transformer winding issues, connection errors, and internal tap changer switch faults.
Functional Applications
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Transformer factory acceptance testing
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Laboratory calibration and analysis
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Electrical equipment quality control
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High-voltage equipment maintenance
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Workshop diagnostic testing
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Transformer turns ratio testing
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Vector group identification
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PT and CT testing
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Substation maintenance
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Power system commissioning
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Transformer factory quality control
Weshine Advantages
Weshine Electric designs the VS-6628 with full three-phase sine wave output to maximize measurement accuracy and operational stability. Engineered as a highly dependable Transformer Turns Ratio Tester, it features intelligent blind testing capability that greatly simplifies field testing under complex site wiring conditions.
To enhance field diagnostic efficiency, Weshine Electric integrates multi-format data export, streamlined reporting, and enhanced safety protection mechanisms—including reverse connection protection and short-circuit protection—ensuring safe and reliable operation in demanding electrical power environments.