HZ-3310C 3 Phase Transformer DC Resistance Tester

To meet the requirement for rapid DC resistance measurement of transformers, our company has developed a three-channel DC resistance tester specifically designed for YN-connected windings. The tester offers several advanced features, including simultaneous energization of all three phases, independent current and voltage sampling, and the ability to simultaneously measure and display the three-phase resistance values and the three-phase unbalance rate. This significantly reduces the test time required for measuring the DC resistance of transformers and addresses the issue of long test durations for each tapped winding of electric power transformers. The tester requires only one-third of the time compared to traditional methods.

I. Performance Features

1.The instrument has a high current output and can automatically select the appropriate current, making it easy to operate.

2.Three-channel measurement allows real-time data collection, enabling simultaneous measurement of three resistance values and calculation of the three-phase resistance unbalance.

3.The instrument can measure all three phases simultaneously or use a single channel, as in traditional methods. It also includes a temperature conversion function for added convenience.

4.The instrument features a reliable and comprehensive protective circuit, ensuring safe operation.

5.A built-in calendar clock and the ability to store up to 500 sets of data, with retrieval and printing functions, offer enhanced usability.

6.The instrument allows users to set printing information, such as phase sequence and tapping position of resistance.

7.The lightweight industrial plastic shell case makes the instrument easy to carry and transport.

8.Equipped with an audible discharge alarm and clear discharge indicators, the instrument helps prevent misoperation.

II.Technical Indicators

1. Output current: select current automatically

2. Range ability: 0-100 Ω

3. Accuracy: 0.2%±2

4. Minimum resolution: 0.1 μΩ

5. Working temperature: -20-40℃

6. Ambient humidity: ≤80%RH, no condensation

7. Working power supply: AC220 V±10%, 50 Hz±1 Hz

8. Volume: L 400 mm*W 340 mm*H 195 mm

9. Net weight: 8 kg

III.FAQ and Solutions

· Unable to Test, and the Buzzer Keeps Sounding

If this situation occurs, first check whether the temperature protection has been triggered and if the fan is functioning properly. If the fan is working normally, restart the device without conducting a test and allow the fan to cool down. Afterward, try testing again.

· LCD Fails to Light Upon Startup

If the LCD does not light up, first check whether the power supply is functioning correctly. Then, check if the fuse is blown. If the fuse is damaged, replace it with a new one.

· Current Display Drops During Charging

This machine automatically selects the current output. To ensure stable measurement results, the measurement current may be lower than the charging current. This behavior is normal

IV. Packing List

Name	Quantity
Transformer DC resistance tester host	1 unit
Dedicated test wires	1 set
Standard resistance	1 unit
Printing paper	2 rolls
Fuse	2 units
Grounding wire	1 unit
Power wire	1 unit