1. Introduction
The HuaZheng HZTTR80A is a portable, high-precision electric transformer turn ratio meter designed for accurate measurement of transformer turn ratios, current, and phase angle. This instrument is essential for electrical engineers and technicians involved in the installation, maintenance, and troubleshooting of power transformers. Its robust design and intuitive interface ensure reliable performance in various field conditions.
2. Safety Information
Please read and understand all safety instructions before operating the HZTTR80A. Failure to follow these instructions may result in injury or damage to the equipment.
- Always ensure the transformer under test is de-energized and safely grounded before connecting the tester.
- Use only the provided test leads and accessories.
- Do not operate the device in wet conditions or explosive atmospheres.
- Ensure proper ventilation during operation.
- Refer to qualified personnel for any repairs or maintenance beyond routine cleaning.
- Wear appropriate personal protective equipment (PPE) when working with electrical equipment.
3. Product Components and Interface
The HZTTR80A is housed in a durable protective case. Key components and interface elements are detailed below:
- Power Input: AC 220V (100V-240V compatible) power socket with a main power switch.
- HIGH Voltage Terminals: Labeled 'a', 'b', 'c', 'n' (for three-phase connections) and 'Single' (for single-phase connections).
- LOW Voltage Terminals: Labeled 'a', 'b', 'c', 'n' (for three-phase connections) and 'Single' (for single-phase connections).
- RS232 Port: For serial communication with external devices.
- USB Port: For data transfer to a computer or external storage.
- Display Screen: High-resolution screen for displaying test results and navigation.
- Built-in Printer: For immediate printing of test reports.
4. Technical Specifications
| Parameter | Value |
|---|---|
| Test Range (Ratio) | 0.9 to 10000 |
| Test Range (Current) | 0 to 2000mA |
| Test Range (Angle) | 0 to 360° |
| Ratio Accuracy (5V Range) | ±(0.1% + 2 digits) (0.9-50) ±(0.2% + 2 digits) (51-200) ±(0.5% + 2 digits) (201-600) |
| Ratio Accuracy (80V Range) | ±(0.1% + 2 digits) (0.9-500) ±(0.2% + 2 digits) (501-2000) ±(0.5% + 2 digits) (2001-10000) |
| Current Accuracy | ±(1% of reading + 0.5mA) |
| Angle Accuracy | ±0.2° |
| Output Voltage | Selectable 5V or 80V |
| Resolution (Ratio) | Minimum 0.0001 |
| Resolution (Current) | 0.001mA |
| Resolution (Angle) | 0.01° |
| Test Voltage | AC 5V @ 1A, AC 80V @ 80mA |
| Operating Power Supply | 220V AC, 50/60 Hz (Input Range: 100V to 240V) |
| Ambient Temperature | -10°C to 40°C |
| Relative Humidity | ≤85%, non-condensing |
| Dimensions (Main Unit) | 360 × 290 × 170 mm |
| Dimensions (Cable Box) | 360 × 290 × 170 mm |
| Net Weight | 5 kg |
| Certificates | CE, ISO |
5. Setup Instructions
Follow these steps to set up your HZTTR80A for testing:
- Unpack and Inspect: Carefully remove the HZTTR80A from its packaging. Inspect the unit and all accessories for any signs of damage. Report any damage to your supplier immediately.
- Power Connection: Connect the provided power cord to the AC power input on the HZTTR80A and then to a suitable AC power outlet (100V-240V, 50/60Hz).
- Prepare Transformer: Ensure the transformer to be tested is completely de-energized, isolated from all power sources, and properly grounded. Verify there is no residual voltage.
- Connect Test Leads:
- Connect the HIGH voltage test leads from the HZTTR80A's 'HIGH' terminals (a, b, c, n, or Single) to the corresponding high voltage windings of the transformer.
- Connect the LOW voltage test leads from the HZTTR80A's 'LOW' terminals (a, b, c, n, or Single) to the corresponding low voltage windings of the transformer.
- Ensure all connections are secure and correct according to the transformer's wiring diagram.
6. Operating Instructions
Once the HZTTR80A is set up and connected to the transformer, proceed with the following steps to perform a test:
- Power On: Flip the main power switch on the HZTTR80A to the 'ON' position. The device will power up and display the main menu.
- Select Test Mode: Use the navigation controls (buttons or touchscreen, if applicable) to select the desired test mode, typically "Ratio Test".
Figure 3: HZTTR80A Display Interface - Ratio Test - Configure Test Parameters: Enter any necessary transformer parameters such as nominal ratio, winding configuration (e.g., Yyn0, Dyn11), and test voltage (5V or 80V) as prompted by the device.
- Start Test: Initiate the test sequence. The HZTTR80A will apply the test voltage and measure the turn ratio, excitation current, and phase angle.
- View Results: Once the test is complete, the results will be displayed on the screen. Review the measured ratio, current, and angle, and compare them with the transformer's specifications.
- Print Report (Optional): If a hard copy is needed, use the built-in printer function to print the test report.
- Save Data (Optional): Use the USB or RS232 port to transfer test data to a computer or other storage device for further analysis and record-keeping.
- Power Off: After completing all tests, power off the HZTTR80A and disconnect all test leads from the transformer.
7. Maintenance
Proper maintenance ensures the longevity and accuracy of your HZTTR80A:
- Cleaning: Keep the instrument clean and free from dust and moisture. Use a soft, dry cloth for cleaning the exterior. Do not use abrasive cleaners or solvents.
- Storage: Store the HZTTR80A in its protective case in a dry, cool environment when not in use. Avoid extreme temperatures and direct sunlight.
- Test Leads: Regularly inspect test leads for wear, cuts, or damage. Replace damaged leads immediately to prevent safety hazards and ensure accurate measurements.
- Calibration: For optimal accuracy, it is recommended to have the HZTTR80A calibrated by an authorized service center annually or as required by your quality control procedures.
8. Troubleshooting
This section provides solutions to common issues you might encounter with the HZTTR80A.
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on | No power supply; Power cord loose; Main switch off | Check power outlet; Ensure power cord is securely connected; Turn on the main power switch. |
| Incorrect or unstable readings | Loose test lead connections; Incorrect test parameters; External interference | Verify all test lead connections are secure; Double-check entered test parameters; Ensure proper grounding and minimize external electrical noise. |
| Printer not working | No paper; Paper jammed; Printer error | Check and replace paper roll; Clear any paper jams; Consult the device's on-screen messages for specific printer errors. |
| Data transfer failure (USB/RS232) | Incorrect cable; Driver issue; Software not running | Ensure correct cable is used; Install necessary drivers on PC; Verify data transfer software is running and configured correctly. |
If the problem persists after attempting these solutions, please contact customer support.
9. User Tips
- Always perform a self-test or check against a known good transformer if available, to verify the instrument's functionality before critical measurements.
- Keep the display screen clean to ensure clear visibility of test results.
- Organize and label your test leads to avoid confusion during complex three-phase connections.
- Regularly back up your test data to an external device to prevent loss.
10. Warranty and Support
The HuaZheng HZTTR80A comes with a 1-year warranty from the date of purchase, covering manufacturing defects. This warranty does not cover damage caused by misuse, accidents, unauthorized modifications, or improper maintenance.
For technical support, service, or warranty claims, please contact HuaZheng customer service. You may also reach out via WhatsApp at +86 137 8733 6155 for assistance.
