Applicable for transformer to submit the dc resistance testproject around group in pick up and overhaul project
Dc resistancetest around group of transformer is an indispensable test project after transformer submits pick up, overhaul and change subpick up switch. Through measurement transformer, pick up or pick upquality of outgoing line can be checked by winding dc resistance of group, whether there is short-circuit or open circuit between turns of winding group, and whether pick up contact of sub-pick up switch is good, etc. QJ44 double-arm electric bridge was used to measure the direct resistance in the past, and the measurement rementcurrent of this type of electric bridge is milliamps, so the measurement time is very long and the precision is low. In order to change this situation, shorten measurement time and reduce the work burden of test personnel, the company developed the Dc resistance meter.
Dc resistance meter is a high-precision replacement product for Dc single-arm and double-arm electric bridge. Instrument adopts advanced switch power supply technology, and its measurement speed is more than 100 times faster than the electric bridge. The show part consists of 4-1/2 LCD liquid crystal display measurement result, 3-1/2 LCD liquid crystal showenvironment temperature or testcurrent value. It overcomes the disadvantages of other similar products, such as inconvenient reading under sunlight by LED show value. At the same time with Automatic arc extinguishing function. The Dc resistance meter has the advantages of fast measurement speed, high precision, intuitive show, strong anti-interference ability, small size, low power consumption, stable and reliable testdata and free from human factors. Instrument contains rechargeable battery group (14.8v), crossover and dc dual-purpose, convenient for scene and field test.
Dc resistance meter conforms to the requirements of DL/T 845.3-2004 standard of general technical conditions of resistancemeasurement part 3.
product names：Dc resistance tachometer、 Transformer dc resistance test instrument、 Transformer direct resistance speed meter、 Transformer direct resistance quick test instrument、Inductive load Dc resistance tachometer、Inductive load dc resistance rapid test instrument、Inductive load dc resistance test instrument、Dc resistance meter
|Conditions of use||environment temperature||0℃～40℃|
|Measuring range||seven range||1μΩ～20mΩ|
|Constant current source||3A(1μΩ～20mΩ、20mΩ～200mΩ、0.2Ω～2Ω)|
|quality||5kg（Including test clamp and test line）|
1.The appearance of the product shall be subject to the actual product，Technical parameters with model if there are any changes，without notice。In case of misappropriation or copying, legal liability will be investigated.
1、Test fast: Dc to hold meter charging maximum output current up to 3 a, when the measurement is effective to compensate large inductance equipment current inertia, It accelerates the core saturation, thus shortening the charging time and improving the test speed is faster than the traditional instrument for single, double bridge hundreds
2、High accuracy: in addition to the advanced four-terminal measurement method, the Dc resistance meter also adopts the advanced constant current power supply technology, so that the current charging current of inductive load is kept at a relatively stable value, with stable resistance ability and strong anti-interference ability, thus ensuring the measurement accuracy. Besides, high-quality components imported from abroad are adopted, with high measurement result accuracy and good repeatability
3、Measuring range wide： resistance measuring range为1μΩ～20kΩ， range wide
4、Ac-dc dual use: dc resistance meter with rechargeable battery group, ac-dc power supply, portable design, easy to use and carry
Enterprise products in strict accordance with international and national standards and rules of industry production, through the national, provincial and municipal electric power research institute and electric power authorities detection, measuring center, fully passed the ISO9001 international quality management system certification, the licence for manufacturing measuring instruments of the People's Republic of China, GB/T19001-2016 quality management system requirements, GB/T24001-2016 environmental management system requirements, GB/T28001-2011 occupational health and safety management system requirements.