Suitable for high and low voltage switch contact (loop) resistance, cable line DC resistance value of high precision measurement, also suitable for other need large current, micro resistance measurement occasions.
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At present, the conventional QJ44 double-arm DC bridge is widely used in power system to measure contact resistance, but the testing current of this kind of bridge is only mA level, so it is difficult to find the defect of reducing the cross-sectional area of the loop conductor. When measuring the contact resistance of the conductive circuit of the high voltage switch, due to the influence of the oil film and oxide layer between the contacts, the measured value is several times too large to truly reflect the contact resistance value. To this end, the latest Ministry of Power standard DL/T845.4 -- 2004 "resistance measuring device general technical conditions: Circuit Resistance Tester and the new version of Verification regulation JJG1052-2009 "Circuit Resistance Tester and Direct Resistance Tester Verification Regulation" stipulate that the measuring current of contact resistance such as switch (isolation) and circuit breaker shall not be less than 100A DC and the minimum current maintenance time shall not be less than 60S to ensure the accuracy of test results.
The instrument operating panel adopts ergonomic design, in line with operating habits, the use of high frequency switching power supply and digital circuit technology, suitable for the measurement of switching control equipment circuit resistance. The test current is 100A DC recommended by the national standard. The circuit resistance can be measured directly under the DC 100A condition, the test results are displayed with a large screen LCD, and has data storage, output printing, time setting and other functions, and another 50A gear for users to choose; Is the only domestic can reach 0.01μΩ resolution and very stable contact resistance tester, performance more than imported large current micrometer. Meet the requirements of high voltage switch maintenance and circuit resistance test in power and power supply departments.
Product nickname：Contact resistance tester, switch loop resistance tester, contact loop resistance tester, contact (loop) resistance tester, High Precision Micro Ohmmeter
| Measuring range | 0～2999.9μΩ |
| Resolution | 0～99.99，0.01μΩ ; 100.0～2999.9，0.1μΩ |
| Test current | DC 50A, 100A, 150A, 200A four-speed fixed output |
| measurement accuracy | ±(0.5% rd+2d) |
| Continuous working time | 5s～599s |
| Display method | Large screen Chinese LCD display |
| communication mode | U disk dump |
| Working power | AC220V±10% 50Hz |
| Total power | 1200W |
| Maximum storage record | 200 |
| working environment | Temperature -10 ° C ~ 40 ° C, humidity：≤80%RH |
| Dimensions | 380×310×260 mm3 |
| Weight | 11kg(No attachments) |
1. The appearance of the product is subject to the actual product. The technical parameters and models are subject to change without prior notice. If there is misappropriation or copying, legal liability will be pursued.
2. For more information about Wuhan UHV, please enter product center . Service email：info@hvtest.cc
1.large current: the circuit resistance automatic tester adopts new power technology, can output large current continuously for a long time, overcome the drawbacks of impulse power instantaneous current, can effectively breakdown the oxide film of the switch contact, get good test results.
2.high stability: in serious interference conditions, the LCD screen last data can be stable within the range of ±1 word, stable reading, good repeatability.
3.High precision: The use of dual-channel high-speed 16-bit Σ-ΔAD sampling, new digital signal processing technology, the highest resolution of 0.01μΩ, is currently able to reach the resolution of 0.01μΩ and very stable contact resistance tester, the performance exceeds the imported large current micrometer.
4.intelligent: The use of imported high performance CPU, measuring system according to the size of the signal automatically switch range, to ensure the testing accuracy of the product. Overtemperature protection circuit can automatically stop the output current when the instrument exceeds the set temperature, to ensure the safe use of the instrument.
5.high quality: the key components are all imported components, through the clever design of the temperature compensation circuit effectively eliminate the impact of environmental temperature on the measurement results, the use of military connectors to enhance the vibration resistance.
6,powerful: current 50A, 100A, 150A, 200A free choice, test time in fast, 10 seconds, 30 seconds, 60 seconds, arbitrary choice, far beyond the performance of other similar instruments.
7.friendly man-machine interface: touch screen control, convenient and quick, independent setting instrument date and time, real-time saving measurement data, real-time printing measurement results.
8.USB transfer: transfer the measurement data to the USB disk through the USB interface, and further analyze and process the measurement data combined with the upper computer software.
9,easy to use: small size, light weight, easy to 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/T45001-2020 occupational health and safety management system requirements.
email： info@hvtest.cc
Skype： Tina Qiao
+8615172408058
