Brief Introduction of Three-Phase DC Resistance Tester:
Product Features
1. The instrument has a large output current and automatically selects the current, making operation simple.
2. Three-channel measurement, real-time acquisition, simultaneously measures three resistance values, and calculates the three-phase resistance unbalance rate.
3. It can measure three phases simultaneously or use traditional single-channel measurement, and also has temperature conversion function for convenience.
4. Equipped with a comprehensive protection circuit, ensuring high reliability.
5. Features a non-volatile calendar, clock, storage for 80 sets of data, recall, and printing functions.
6. Allows setting of phase sequence, tap position, and other printing information for resistance.
7. Vertical case structure for easy field operation.
8. Audible discharge alarm with clear discharge indication to reduce operational errors.
Product Parameters:
1. Output current: Automatic selection (maximum 20A)
2. Output voltage: DC12V
3. Measurement range: 0～100Ω
4. Accuracy: 0.2%±1μΩ
5. Minimum resolution: 0.1μΩ
6. Operating temperature: -20～40℃
7. Ambient humidity: ≤80%RH, no condensation
8. Power supply: AC220V±10%, 50Hz±1Hz
9. Dimensions: 440mm (L) x 240mm (W) x 390mm (H), Net weight: 15kg
The three-phase DC resistance tester is a
tester for transformer DC resistance, which is a mandatory test item in transformer manufacturing for semi-finished and finished products, factory acceptance tests, installation, handover tests, and preventive tests by power departments. It can effectively detect manufacturing defects such as poor material selection, welding issues, loose connections, missing strands, broken wires in transformer coils, and hidden dangers after operation. The instrument can also perform single-channel, three-phase single-channel, and three-phase continuous winding DC resistance tests. The maximum test current for a single channel is 30A. It consists of three independent constant current linear power supplies and test units, allowing simultaneous testing of three phases of transformer tap windings, displaying results in real-time, and automatically calculating the unbalance rate, greatly reducing measurement time and improving work efficiency. The instrument is simple to operate, provides accurate and stable test data, and has data printing and storage functions. It is the preferred equipment for DC resistance testing work.
