Product Details

1、 Product Overview

The DC resistance of the transformer is a required test item for the factory test, installation, handover test of semi-finished products and finished products in transformer manufacturing, as well as the preventive test of the electric power department. It can effectively find the manufacturing defects such as material selection, welding, loose connection parts, missing strands, broken wires and hidden dangers after operation. In order to meet the need of rapid measurement of transformer DC resistance, our company has developed a three channel DC resistance tester for YN connected windings. The DC resistance instrument realizes the functions of three-phase simultaneous power on, independent current sampling, voltage sampling, measuring and displaying three-phase resistance value and three-phase imbalance rate at the same time, which greatly shortens the test time of transformer DC resistance and solves the problem of long test time of DC resistance of each tap winding of power transformer, which is only 1/3 of the time of traditional methods.

2、 Performance characteristics

1. The output current of the instrument is large 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.

3. It can not only measure three-phase at the same time, but also measure single channel in the traditional way. It also has the temperature conversion function, which is convenient to use.

4. It has perfect protection circuit and strong reliability.

5. The display adopts 800 * 480 dot matrix 65K color high brightness large screen (7-inch), and the display data is clear and easy to read.

6. Built in calendar clock, 500 groups of data storage, reading and printing functions.

7. Print information such as the phase sequence and tapping position of the resistor can be set.

8. Industrial plastic case, light weight, easy to carry.

9. With audible discharge alarm, the discharge indication is clear, reducing misoperation.

3、 Technical indicators

1. Output current: automatic current selection (maximum 20A)

2. Range: 0~100 Ω

3. Accuracy: 0.2% ± 2

4. Minimum resolution: 0.1 μ Ω

5. Working temperature: - 20~40 ℃