The DC resistance of the transformer is a required test item for the semi-finished product, finished product delivery test, installation, transfer test and preventive test of the power sector in transformer manufacturing. It can effectively find the manufacturing of transformer coil materials, welding, loose connection parts, missing stock, broken wires, etc. Defects and hidden dangers after operation.
MTS-DRW-20A; ın order to meet the needs of transformer DC resistance fast measurement, the instrument uses new power technology, which has the characteristics of small size, light weight, large output current and so on.
MTS-DRW-20A; the whole machine is controlled by a single-chip microcomputer, which automatically completes self-test, data processing, display, and other functions, and has automatic discharge and discharge indication functions. The instrument has high test accuracy and easy operation and can realize fast measurement of transformer direct resistance.
MTS-DRW-20A; dual-channel DC resistance tester is specially designed for three-core five-column large-scale transformer temperature rise measurement, fast charging and measuring speed, can meet the time requirements of transformer temperature rise test, two-channel measurement, real time sampling and printout.
TECHNICAL PARAMETERS
| Measuring Current | HV CH1 ：<15mA, 40mA, 200mA, 1A, 5A |
| LV CH2 ：2A, 5A, 10A, 20A | |
| Measuring Range | （HV CH1—5A）：1mΩ～2Ω |
| （HV CH1—1A）：5mΩ～10Ω | |
| （HV CH1—200mA）：100mΩ～50Ω | |
| （HV CH1—40mA）：1Ω～250Ω | |
| （HV CH1—<15mA）: 10Ω～20kΩ | |
| （LV CH2—20A）：100μΩ～500mΩ | |
| （LV CH2—10A）： 200μΩ～1Ω | |
| （LV CH2—5A）：1mΩ～1.6Ω | |
| （LV CH2—2A）：5mΩ～4Ω | |
| Measuring Accuracy | ±(0.2%+2digits) |
| Max. Resolution | 0.1μΩ |
| Power Supply | AC220V±10%，50Hz±1Hz |
| Working Condition | Temperature :0～40℃ RH:≤90% No condensation |
| Oversize | 448*463*177(mm) |
| Weight | 17.6kg (exclude accessories) |
GENERAL INFORMATION
Why Measure Transformer Winding Resistance?
Transformer Winding Resistance Test; is to check the large differences between the windings and the gaps in the connections. Measuring the resistance of the transformer windings ensures that each circuit is properly connected and that all connections are tight. Measuring the resistance of the windings ensures that the connections are correct and the resistance measurement shows that there are no serious mismatches or trips.
What is Transformer Winding Resistance Tester?
It is an important diagnostic tool for assessing potential damage to transformers caused by poor design, poor assembly, abuse, unsuitable environments, overloading or inadequate maintenance. Winding resistance in transformers will change due to short circuits, loose connections or broken contacts in tap changers. Regardless of configuration, resistance measurements are normally done phase-to-phase and the readings are compared with each other to determine if they are acceptable.
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