300A Contact Resistance Tester

1. The three-phase CNC sine inverter power supply output has soft start and soft stop functions, so the testing speed is fast and the accuracy is high.

2. Three phase transformer, single-phase transformer, PT, CT, Z-type transformer ratio, group, polarity testing function.

3. CT ratio polarity testing function.

4. It has angle difference testing function during single-phase testing.

5. The tap changer can be tested up to 99 gears.

6. Wide testing range, up to 10000.

7. High and low voltage reverse connection reminder.

8. Output short circuit reminder.

9. Non power-off clock and date display; The data storage method is local storage, with 100 test data pieces. The stored data can be transferred to a computer (PC);

10.Thermal printer printing function.

11. Small size, light weight, convenient for carrying and use.

This instrument (circuit contact resistance tester) features an ergonomic control panel designed for user-friendly operation. Utilizing high-frequency switching power supplies and digital circuit technology, it is specifically engineered for measuring loop resistance in switchgear circuits. The test current complies with the national standard's recommended 300A DC current. Capable of directly measuring loop resistance at 300A DC, the device displays results on a large LCD TFT screen while offering essential functions including data storage, print output, and time settings. Users can select from three current ranges: 100A,200A, and 300A. Customizable testing duration allows up to 60 seconds, making it a highly reliable contact resistance tester that outperforms imported high-current microohmmeters. Designed to meet field maintenance requirements for high-voltage switchgear in power supply departments and circuit resistance testing specifications for switchgear manufacturers.