MOEORW- W4620A2 20A DC Resistance Tester
The MOEORW -W4620A2 DC resistance tester is a dedicated intelligent testing device for measuring the DC resistance of transformers, positioned as a professional instrument for power testing.
Equipped with a high-speed microcontroller, it features high output current, high precision, multiple range settings, comprehensive protection, and convenient operation.
It is suitable for DC resistance testing in transformer production, installation and maintenance, and for preventive testing in the power sector.
Product Introduction
The DC resistance of a transformer is a mandatory test item in the manufacturing process, including semi-finished and finished product factory tests, installation, overhaul, tap changer modifications, commissioning tests, and preventative tests by the power sector. It can check the welding quality of winding joints and the presence of inter-turn short circuits, verify the good contact of each position of the voltage tap changer, confirm the correspondence between the actual and indicated tap changer positions, check for broken leads, and inspect multi-strand wires for broken strands. To meet the need for rapid measurement of transformer DC resistance, our company has developed the MOEORW- W4620A2 20A DC Resistance Tester. This instrument adopts new power supply technology and features small size, light weight, large output current, good repeatability, strong anti-interference ability, and comprehensive protection functions. The entire unit is controlled by a high-speed single-chip microcomputer, with a high degree of automation and automatic discharge and discharge alarm functions. The instrument has high testing accuracy, is easy to operate, and can realize rapid measurement of transformer DC resistance.
Product Parameter (specification)
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Project |
Technical specifications and parameters |
Remark |
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Test current |
<20mA, 1A, 2.5A, 5A, 10A, 20A |
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Measurement range |
100μΩ～1Ω (20A) 500μΩ～2Ω (10A) 1mΩ ～4Ω ( 5A) 2mΩ ～8Ω (2.5A) 5mΩ ~ 20Ω (1A) |
Accuracy: ±(0.2% + 2 characters) |
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10Ω-20KΩ (<20mA) |
Accuracy: ±(0.5% + 2 characters) |
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minimum resolution |
0.1μΩ |
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show |
LCD monitor |
The resistance display has 4 significant digits. |
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Data storage |
1000 sets |
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Work environment |
Ambient temperature: 0℃～40℃; Relative humidity: <90%RH, non-condensing. |
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power supply |
AC 220V±10V, 50Hz±1Hz |
Fuse 5A |
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Maximum power consumption |
500W |
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External dimensions |
400×225×350 (mm) |
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Weight |
Main unit 15.1KG, cable box: 5.75KG |
Product features and applications
1. The whole machine is controlled by a high-speed single-chip microcomputer, with a high degree of automation and simple operation.
2. The High Precision DC Resistance Tester adopts a brand-new power supply technology, with multiple current ranges and a wide measurement range, making it suitable for measuring the DC resistance of large and medium-sized transformers.
3. It has comprehensive protection functions and can reliably protect the instrument from the impact of back EMF, making its performance more reliable.
4. It features an audible discharge alarm and clear discharge indication, reducing the risk of misoperation.
5. Intelligent power management technology ensures the instrument always operates at minimum power, effectively saving energy and reducing heat generation.
6. Seven-inch high-brightness touch color LCD, clear display under strong light, full touch screen operation, and free switching between Chinese and English.
7. The instrument has a built-in perpetual calendar clock and power-off memory, which can store 1000 sets of test data, which can be viewed at any time.
8. The instrument is equipped with RS232 and USB interfaces, enabling communication with a computer and storage via USB flash drive.
9. Equipped with a panel-mounted mini printer, capable of printing measurement results in English.
10. The transformer DC resistance tester can be controlled via Android phones or tablets. Follow the WeChat official account, download the dedicated APP, and control the instrument throughout the process. Test data is stored and uploaded for easy access.
Prodection details
Transformer production process
During the transformer manufacturing process, factory tests are conducted on semi-finished and finished products to detect production quality issues such as winding welding quality and inter-turn short circuits.
Transformer installation and maintenance
After transformer installation, overhaul, and handover testing following tap changer changes, the accuracy of tap changer contact and position, integrity of lead wires, and issues such as broken strands in multi-strand wires should be checked.
Preventive testing in the power industry
The power sector conducts routine preventative tests and regularly checks the DC resistance of transformers to ensure their safe and stable operation.
Company Qualifications
Q: Are you a factory or a trading company?
We are a professional manufacturer of testing equipment.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: How is the after-sales service?
A: The warranty period is 12 months. After the warranty period, we also provide lifetime service paidrepair or service.
Q: What about transportation?
A: It depends on your requirements. We can ship to your airport by air, to your seaport by sea, or to your office by courier.
We also accept cooperation with your shipping agent.
Q: Are your keyboard, interface, software, and manuals in English?
A: Yes, if you are using the English version of the keyboard, interface, software, and manual and require other languages, please contact us for confirmation.
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