Which is a good manufacturer of DC resistance testers

Three channel DC resistance tester (transformer)

Three channel DC resistance tester (transformer)

1productOverview
The DC resistance of transformers is a necessary test item for semi-finished and finished products in transformer manufacturing, factory testing, installation, handover testing, and preventive testing by the power department. It can effectively detect manufacturing defects such as material selection, welding, loose connection parts, missing strands, and broken wires of transformer coils, as well as hidden dangers after operation. Greatly shortened the testing time of transformer DC resistance and solved the problem of long testing time for DC resistance of each tap winding of power transformers,To meet the needs of rapid measurement of transformer DC resistance, our company has developed a three channel DC resistance tester for YN connected windings. This instrument realizes the functions of simultaneous three-phase power on, independent current sampling, voltage sampling, and simultaneous measurement and display of three-phase resistance values and three-phase unbalance ratesThe required time is only one-third of traditional methods.

2、 Security measures
1. Before using this instrument, be sure to read this manual carefully.
2. The operator of the instrument should have general knowledge of using electrical equipment or instruments.
3. This instrument can be used both indoors and outdoors, but should be avoided from places such as rain, corrosive gases, excessive dust, high temperatures, and direct sunlight.
4. The instrument should avoid severe vibration.
5. The maintenance, care, and adjustment of instruments should be carried out by professionals.
6. After the test is completed, be sure to wait for the discharge alarm to stop before turning off the power and removing the test line.
7. When measuring an unloaded voltage regulating transformer, be sure to wait for the discharge indicator alarm sound to stop before switching gears.
8. During the testing process, it is prohibited to move the test clamp and power supply line.
3、 Performance characteristics
1. The instrument has a large output current and the automatic selection of current is easy to operate.
2. Three channel measurement, real-time acquisition, simultaneous measurement of three resistance values, and calculation of three-phase resistance imbalance rate.
3. It can measure three phases simultaneously or measure in a single channel according to traditional methods, and also has temperature conversion function, making it easy to use.
4. It has a complete protection circuit and strong reliability.
5. Built in calendar clock, 500 sets of data storage, retrieval, and printing functions.
6. You can set the phase sequence and tap position of the resistor to print information.
7. Industrial plastic shell chassis, lightweight and easy to carry.
8. Equipped with sound discharge alarm, clear discharge indication, and reduced misoperation.
4、 Technical indicators
1. Output current: Automatic selection of current (up to 20A)
2. Range: 0-100 Ω
3. Accuracy: 0.2% ± 2
4. Small resolution: 0.1 μ Ω
5. Working temperature: -20~40 ℃
6. Environmental humidity: ≤ 80% RH, no condensation
7. Working power supply: AC220V ± 10%, 50Hz ± 1Hz
8. Volume: Length 400mm * Width 340mm * Height 195mm
9. Net weight: 8kg