Power transformers are critical assets in electrical power systems, and their winding mechanical integrity plays a key role in long-term operational reliability. According to IEC 60076-5:2000 , variations in short-circuit impedance are widely used as an important indicator for assessing possible winding deformation.
The 6309E Transformer Characteristic Parameter Tester is designed for comprehensive electrical testing of power transformers. It integrates multiple key diagnostic functions, including short-circuit impedance, no-load loss, load loss, and zero-sequence impedance measurement, providing support for manufacturing quality control, commissioning, maintenance, and condition assessment.
The instrument adopts a six-channel synchronous AC sampling architecture with digital signal processing to improve measurement consistency in low power factor conditions.
All channels are time-synchronized with a deviation of less than 1 μs, helping to reduce phase errors caused by asynchronous sampling in conventional measurement systems.
The system uses a vector-based calculation method for line voltage instead of simplified √3 conversion.
This approach provides improved accuracy under unbalanced three-phase conditions, resulting in more reliable representation of actual operating voltages.
The 6309E incorporates automated correction algorithms for:
- Voltage compensation
- Current compensation
- Temperature compensation
- Frequency compensation
Measured data can be normalized to reference conditions (75°C rated temperature and rated current), enabling direct comparison with nameplate and factory test values.
This improves consistency of test results across different operating environments and supports more reliable trend analysis of transformer condition.
The instrument integrates multiple transformer test functions in a single platform:
- Short-Circuit Impedance Test
Calculates Zk, Xk, Lk, and Zke, and provides impedance voltage deviation analysis. Alarm thresholds can be configured for deviation limits. - Single-Phase Test Mode
Supports fault localization in three-phase transformer windings. - Zero-Sequence Impedance Test
Designed for transformers with grounded neutral configurations. - Load Loss Measurement
Evaluates winding losses under equivalent load conditions. - No-Load Loss Measurement
Used for core and magnetic circuit condition assessment.
- 7-inch color touchscreen with graphical user interface
- Up to 160 stored test records
- Built-in thermal printer for on-site reporting
- USB and RS232 communication interfaces
- Time-stamped data logging for traceability
The system supports structured data export for integration into asset management or test reporting systems.
| Parameter | Range | Accuracy |
|---|---|---|
| Voltage | 1 V – 750 V | ±(0.2% rdg + 0.05% FS) |
| Current | 1 mA – 100 A | ±(0.2% rdg + 0.05% FS) |
| Power (cosφ > 0.1) | — | ±(0.5% rdg + 0.05% FS) |
| Power (0.02 < cosφ < 0.1) | — | ±(1.0% rdg + 0.05% FS) |
| Frequency | 45 – 65 Hz | ±0.003 Hz |
| Phase Angle | 0° – 360° | ±0.1° |
| Short-Circuit Impedance | 0 – 100% | ±0.5% |
Additional Specifications:
- Resolution: 5-digit display
- Dimensions: 325 * 278 * 145 mm
- Weight: approx. 4.25 kg
- Operating temperature: -10°C to +45°C
- Power supply: AC 220 V ±10%
- Warm-up time: < 5 minutes
The instrument is suitable for routine factory testing of power transformers, including no-load and short-circuit tests.
It supports automated measurement workflows, reducing manual calculation and improving consistency of test results across production batches.
Test data can be directly exported for reporting and archival purposes.
After transformer maintenance or repair, short-circuit impedance testing is commonly used to evaluate potential winding deformation.
The 6309E provides stable field measurement capability and supports comparison with historical factory test data, enabling more reliable assessment of winding condition changes.
For in-service transformers, periodic testing is used to monitor changes in impedance and loss characteristics.
The system supports automated alarm thresholds for impedance deviation, assisting in early detection of potential winding abnormalities and supporting condition-based maintenance strategies.
The instrument complies with IEC 60076-5 and GB 1094.5 standards for transformer testing and is suitable for acceptance testing of newly installed transformers.
It supports batch testing workflows and structured reporting for commissioning documentation.
Designed for mobile inspection and third-party testing applications across a wide range of transformer voltage levels.
The system supports structured data storage with time stamping and export functions, enabling traceable reporting for inspection and certification workflows.
The 6309E Transformer Characteristic Parameter Tester is designed to support comprehensive electrical testing and diagnostic evaluation of power transformers throughout their lifecycle.
By integrating multiple test functions, synchronized measurement architecture, and standardized data processing capabilities, the instrument provides a practical solution for manufacturing quality control, field maintenance, and acceptance testing applications.
Product reference picture
