HZTTR80A TTR 3 Phase Transformer Ratiometer
HZTTR80A TTR 3 Phase Transformer Ratiometer
The HZTTR80A transformer ratio test set. It integrates functions for testing turn ratio, voltage ratio, vector relationship, winding connection group, polarity, tap position, and excitation current. This tester is a lightweight and portable instrument, with both the tester and its accessories housed in a multi-functional engineering plastic case that is resistant to cold, heat, moisture, and shocks, making it suitable for field tests.
Application Industries
| Industry | Typical Use Case |
|---|---|
| Power Generation & Substations | Commissioning and routine testing of power transformers, distribution transformers, and instrument transformers (CT/PT) |
| Transformer Manufacturing | Factory acceptance testing (FAT), quality assurance, and nameplate verification of newly built transformers |
| Transformer Repair & Refurbishment | Post-repair validation of winding integrity, tap-changer functionality, and reconnection accuracy |
| Railway Electrification | Ratio and polarity checks on traction transformers and signaling power supply transformers |
| Petrochemical & Heavy Industry | Maintenance of oil-filled and dry-type transformers in refineries, chemical plants, steel mills, and mining operations |
| Electrical Testing Services | Third-party commissioning, diagnostic testing, and preventive maintenance audits for utility and industrial clients |
| Renewable Energy | Verification of step-up transformers in solar farms, wind farms, and battery energy storage systems (BESS) |
Main Functional Features
▪ Capable of PT ratio and polarity testing.
▪ With a blind-testing function, it can accurately measure the turns ratio of a three-phase transformer even when its connection group type is unknown. It can also correctly determine the phase relationship between the primary and secondary sides and accurately calculate the group number.
▪ Capable of testing autotransformers, Z-type transformers, and phase-shifting transformers.
▪ Added tap mode settings to accommodate transformers with high voltage at high tap positions and low voltage at high tap positions.
▪ Added low-voltage side tap settings to accommodate transformers with taps on the low-voltage side.
▪ Graphical display settings for more intuitive readings.
▪ Simultaneous measurement of three-phase ratios during three-phase transformer testing for faster testing speed.
Technical Parameters
| Test Range | Ratio: 0.9 to 10000 |
| Current: 0 to 2000mA | |
| Angle: 0 to 360° | |
| Ratio Accuracy (80V Range) | ±(0.1% + 2 digits) (Ratio: 0.9–500) |
| ±(0.2% + 2 digits) (Ratio: 501–2000) | |
| ±(0.5% + 2 digits) (Ratio: 2001–10000) | |
| Current Accuracy | ±(1% of reading + 0.5mA) |
| Angle Accuracy | ±0.2° |
| Output Voltage | Selectable: 5V or 80V (AC) |
| Resolution | Ratio: Minimum 0.0001 |
| Current: 0.001mA | |
| Angle: 0.01° | |
| Test Voltage & Corresponding Current | AC 5V @ 1A |
| AC 80V @ 80mA | |
| Operating Power Supply | Input Voltage: 100V to 240V AC |
| Frequency: 50/60Hz | |
| Dimensions | Main Unit: 360 × 290 × 170 mm |
| Cable Box: 360 × 290 × 170 mm |
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