
ASTM D 924 Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Elec
Product Introduction
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HZTTR80A Transformer Turn Ratio Tester
Panel Description

1. Grounding Terminal: Before conducting any tests, please safely ground the grounding terminal to avoid the risk of electric shock.
2. Power Socket and Switch: The power input port for the entire device, used to connect or disconnect the test power supply.
3. High-voltage side connection terminals: There are three-color (yellow, green, red, and black, with the black one being counted as part of the color indication context here for understanding the connection mapping, though technically it's a single additional color column beyond the three primary phase colors) binding posts, corresponding to connection with the A, B, C, N phases of the high-voltage side of the transformer being measured.
4. Low-voltage side connection terminals: There are three-color (yellow, green, red, and black, similarly, the black one is included in the context for connection mapping explanation) binding posts, corresponding to connection with the a, b, c, n phases of the low-voltage side of the transformer being measured.
5. High-Voltage Side Terminals: Yellow, green, and red terminals for connecting to the A, B, and C phases of the high-voltage side of the transformer under test.
6. Low-Voltage Side Terminals: Yellow, green, and red terminals for connecting to the a, b, and c phases of the low-voltage side of the transformer under test.
7. RS232 Communication Interface: Interface for computer communication.
8. Printer: Prints test results.
9. USB: Connects to a USB flash drive for data export.
10. Display Screen: 7-inch high-definition color touchscreen LCD with adjustable backlight for displaying the operation menu and test results.




Technical Index
Test Range: Transformation Ratio -- 0.9 to 10000, Current -- 0 to 2000mA, 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)
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 + 0.5 mA)
Angle Accuracy: ±0.2°
Output Voltage: Selectable 5V or 80V
Resolution: Ratio -- Minimum 0.0001, Current -- 0.001mA, Angle -- 0.01°
Test Voltage: AC 5V @ 1A, AC 80V @ 80mA
Operating Power Supply: The maximum power is 50W
Troubleshooting and Maintenance
If any abnormalities occur during the use of the tester, please follow the steps below for troubleshooting:
1. If the measurement data is abnormal, please check if the wiring is correct. If it is still abnormal, you can perform a self-test using the following method. The wiring is shown in the figure below:After connecting the wires, select any three-phase connection method for testing. If the measured value is approximately 1.0000, the instrument is functioning normally; otherwise, there is an issue with the instrument. If no shorting wire is available, you can also short-circuit the high-voltage side yellow, green, and red wire clamps to the corresponding low-voltage side yellow, green, and red wire clamps.
2. If the tester does not respond when turned on and the display screen is not lit, please check if the power fuse inside the panel is blown.
3. If it is confirmed to be an internal fault of the tester, please contact our company immediately, and we will resolve it as soon as possible.

Packing list
No. | Item | Qty |
1 | Host | 1 |
2 | Test Cables | 1 |
3 | Power Cord | 1 |
4 | Operation Manual | 1 |
5 | Certificate of Conformity | 1 |
6 | Fuse | 2 |
7 | Printing Paper | 1 |
8 | Packing List | 1 |
9 | Ground wire | 1 |




With perfect technology, high quality and superior performance, our company is in the forefront of the same industry, and has become one of the most powerful manufacturers in the ASTM D 924 Standard Test Method for Dissipation Factor (or Power Factor) and Relative Permittivity (Dielectric Constant) of Elec industry. We stick to the spirit of pragmatic and innovative enterprise. We adhere to the concept of people-oriented, which is reflected in the protection of rights and interests and humanistic care.
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