The DC resistance test of transformer winding is an essential test item after transformer handover, major repair, and tap changer adjustment. By measuring the DC resistance of transformer windings, it is possible to check the quality of lead wire welding or connections, whether there are inter-turn short circuits or open circuits in the winding, and whether the tap changer contacts are in good condition.
The DC resistance fast tester is a high-precision replacement product for DC single and double arm bridges. The instrument adopts advanced switching power supply technology, and its measurement speed is more than a hundred times faster than that of bridges. The display part uses a four and a half digit LCD to show measurement results, and a three and a half digit LCD to show ambient temperature or test current value, overcoming the disadvantage of other similar products with LED displays that are difficult to read in sunlight. It also has an automatic arc suppression function. This instrument has the advantages of fast measurement speed, high accuracy, intuitive display, strong anti-interference ability, small size, low power consumption, stable and reliable test data, and is not affected by human factors. The instrument is equipped with a rechargeable battery pack (12V), suitable for both AC and DC use, facilitating on-site and field testing.
This product complies with the requirements of DLT 845.3-2004 "General Technical Conditions for Resistance Measuring Devices Part 3: DC Resistance Tester".
Equipment Use
The DC resistance fast tester is an ideal instrument for measuring the DC resistance of various inductive loads such as power transformers, large motors, and instrument transformers, as well as the contact resistance of low-voltage switches, wire and cable, or weld joint resistance.
Product Aliases
DC resistance quick tester, transformer DC resistance tester, transformer winding DC resistance tester, transformer direct resistance quick tester, transformer direct resistance fast tester, inductive load DC resistance quick tester, inductive load DC resistance fast tester, inductive load DC resistance tester
Performance Features
● Fast test speed: The maximum output charging current of this instrument can reach 2A. During measurement, it can effectively compensate for the current inertia of large inductive equipment, accelerate core saturation, thereby shortening charging time and improving test speed, which is hundreds of times faster than traditional single and double arm bridges.
● High accuracy: In addition to adopting the advanced four-terminal measurement method, this instrument also uses advanced constant current power supply technology, keeping the charging current for inductive loads at a relatively stable value, with stable inductance resistance capability and strong anti-interference ability, thereby ensuring measurement accuracy. Moreover, it uses high-quality imported components, resulting in high measurement accuracy and good repeatability.
● Wide measurement range: The resistance measurement range is 1μΩ to 2KΩ, with a wide range.
● AC/DC dual use: This instrument is equipped with a rechargeable battery pack, supports AC and DC power supply, and has a portable design, making it convenient to use and carry.
