The HZZH-5 Transformer Comprehensive Tester integrates a DC resistance tester, low-voltage short-circuit impedance tester, on-load switch tester, demagnetization tester and transformer ratio tester into one device for testing large power transformers.
l Product Design
1. One-time wiring completes all test items, reducing the workload of on-site testers.
2. Equipped with a 7-inch color touch LCD screen for control and display, providing a user-friendly interface.
3. Built-in micro printer for on-site printing of test results.
4. USB storage function for external storage of test results.
5. One isolated RS232 communication interface with standard protocol communication.
6. Bluetooth communication module with standard protocol wireless communication.
7. High-reliability RS485 bus for internal communication.
8. Isolated circuit design to eliminate interference between test functions; hardware and software filtering to improve anti-interference capability; good grounding and shielding measures to enhance overall anti-interference capability.
l DC Resistance Test
1. Three-phase simultaneous testing and automatic magnetization.
2. High and low voltage current and potential test leads can be connected to the transformer at once, eliminating the need to switch test leads during the test.
3. For star-connected windings with a neutral point, the A0, B0, and C0 phase resistances can be tested simultaneously, significantly saving test time.
4. For an internally delta-connected three-phase five-limb transformer, the automatic excitation method can be used during low-voltage side testing, which offers fast testing speed.
5. Displays and prints all test data of high, medium, and low voltage windings, automatically calculates three-phase unbalance, and prints resistance values converted to rated temperature.
6. Comprehensive back EMF protection.
l Short-Circuit Impedance Test
1. Single-phase 220V power supply is used to automatically apply current to the AB, BC, and CA windings ofthe transformer, synchronously collect data, and convert it to the rated impedance percentage.
2. For three-phase transformers with Y/△, Y/Y, △/Y connections, the wiring can be connected once, and the three-phase measurement can be selected to automatically measure the data and calculate the impedance value and impedance error.
3. When using the single-phase method for three-phase transformers, input 1/3 of the rated capacity.
4. Displays and prints all test data of the transformer.
5. The device can permanently store test data.
l On-load Switch Test
1. Three independent constant current sources.
2. Powerful functions, including transition waveform, transition time, transition resistance, and three-phase synchronization measurement.
3. Intelligent testing and result analysis.
4. Displays and prints the test waveform of the transformer's on-load switch.
5. The instrument can permanently store test waveforms.
6. Equipped with an automatic discharge circuit and overvoltage protection circuit.
l Transformer demagnetization Test
1. Fast demagnetization with obvious effects.
2. Fully automatic and manual demagnetization functions, with a progress bar and percentage displayed during demagnetization.
3. Comprehensive back EMF protection.
4. Suitable for eliminating residual magnetism in large power transformers of 35kV and above before operation.
5. Automatic current stabilization judgment, data acquisition, and processing functions.
6. One-button operation, strong anti-interference ability.
7. Can directly use the current leads of the DC resistance test, convenient for use with the DC resistance test.
l Transformer Ratio Test
1. Chinese/English menu prompts, simple and convenient operation.
2. Three-phase testing only requires inputting the high-voltage side connection method to automatically measure the group.
3. Capable of both single-phase measurement and automatic testing of three-phase windings. The connection group can be arbitrarily selected, completing the measurement of parameters such as the ratio, error, and connection group of AB, BC, and CA phases in one go.
4. Protection function for high and low voltage reverse connection.
5. Fast testing speed, completing single-phase testing in 15 seconds.
6. Protection functions for transformer short-circuit and inter-turn short-circuit.
1.DC Resistance Test
Three-Phase Test | 10A, 5A, 1A three ranges. | ||
Test Range | 10A：500.0μΩ~2Ω | ||
5A： 10mΩ~4Ω | |||
1A： 1Ω~20Ω | |||
Phase-Separated Test | 20A, 10A, 5A, 1A four ranges. | ||
Test Range | 20A：100.0μΩ~1Ω | ||
10A：500.0μΩ~2Ω | |||
5A： 10mΩ~4Ω | |||
1A： 1Ω~20Ω | |||
Resolution | 0. 1μΩ | ||
Measurement Accuracy | class 0.2 | ||
2. Short-Circuit Impedance Test
Voltage Measurement Range： 5～400V | Measurement Accuracy: class 0.2 |
Current Measurement Range: 0. 1～10A | Measurement Accuracy: class 0.2 |
3. On-load Switch Test
Output Current: | 1A: 0.5 A |
Resistance Resolution | 0.01Ω |
Transition Resistance Range | 0.2Ω~20Ω 1Ω~50Ω |
Transition Time Range | 0～240ms |
Measurement Accuracy | Transition resistance ± （ 5% + 0.2Ω) |
Synchronization Time | 0. 1ms |
4. Transformer demagnetization Test
Output DC Current | 1A - 10A |
Output DC Voltage | 20V, 30V, 40V, 50V |
5. Transformer Ratio
Range of Ratio | 1-5000 | |
Measurement Accuracy | 0. 1%（0.8—1000） 0.2% (1000—2000) 0.5% (2000—5000) | |
Transformer Connection Group | YY0 ，YY6 ，YD1 ，YD5 ，YD7 ，YD11， DD0 ，DD2 ，DD4 ，DD6 ，DD8 ，DD10， DY1 ，DY5 ，DY7 ，DY11 | |
Testing Voltage | 10V/160V | |
中文
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+86-312-6775656
+86 13731210226
sales03@bdhuazheng.com
