MOEORW- W4620LH 20A Handheld DC resistance Tester
High-precision 20A handheld transformer DC resistance tester, a dedicated intelligent instrument for power equipment testing.
20A high current output, automatic range shifting, lithium battery powered, portable and easy to operate, accurate measurement.
On-site testing and preventive testing of DC resistance of power equipment such as distribution transformers and instrument transformers
Product Introduction
The MOEORW-W4620LH High Precision DC Resistance Tester is a transformer DC resistance tester specifically designed for power equipment testing, and also serves as a convenient 20A handheld DC resistance tester. The instrument outputs a maximum of 20A DC current and 20V voltage, with a measurement range of 1mΩ to 20kΩ and an accuracy of ±(indicated value * 0.2% + 1μΩ). It is suitable for DC resistance testing of distribution transformers, instrument transformers, etc. Powered by a lithium battery, it supports automatic/manual range switching, continuous measurement, energy recovery, voice broadcast, and Bluetooth transmission functions, and can store 100 sets of data. The device is small in size, weighs only 1kg, has comprehensive protection, and is easy to operate, making it an ideal tool for outdoor mobile operations and preventative power testing.
Product Parameter (specification)
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Performance indicators |
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Measurement range |
1mΩ ~ 0. 2 Ω (2 0 A); 1mΩ ~ 1 Ω (1 0 A); 10mΩ ~ 2 Ω (5A); 10mΩ ~ 10 Ω ( 2 A); 10mΩ ~ 20 Ω (1A); 1Ω ~ 200 Ω (100mA); 10Ω ~ 2 k Ω (10mA); 100Ω ~ 20 k Ω (1mA) |
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Test accuracy |
+ (indicated value * 0.2% + 1 μΩ ) |
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minimum resolution |
0.1 μΩ |
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Test time |
1 5min (Max) |
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Number of measurements |
≥ 50 times ( based on 1Ω load, 10A discharge mode , 5min duration) |
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Storage depth |
100 historical data |
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Instrument parameters |
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Rated power |
Maximum 100 W |
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Output voltage |
20 V ( Max, when the current is less than 1A ) |
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Output current |
DC Adjustable 1mA/10mA/100mA/1 A /2A/ 5 A/ 10A / 20A |
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Battery capacity |
2.5Ah |
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Display method |
LCD screen |
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Protection function |
Overcurrent and short circuit protection: 33A threshold |
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Overheat protection: Battery overheat and power device protection, threshold: 70 ℃ |
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Battery over-discharge protection: The battery will enter battery protection mode when the voltage drops below 22V . |
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Additional features |
One-button power on/off and measurement |
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Automatic range (gear) switching: Supports automatically determining the appropriate range (gear). |
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Continuous measurement: Enables multiple measurements of multi-stage transformers without shutting down the power supply. |
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Energy recovery: After the test is completed, the remaining energy in the transformer windings is recovered to the battery (green and environmentally friendly). |
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High current output: Supports 20 A high current. |
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Bluetooth data transmission: Supports BLE 4.0 protocol Bluetooth transmission, compatible with mini-programs, etc. |
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Voice broadcast function: Test data is automatically broadcast via voice. |
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External dimensions |
155 * 1 1 2 * H 7 5 mm |
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weight |
1 kg |
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Charger parameters |
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Input voltage |
AC 110 V~ 240 V |
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Output Specifications |
29.4 V / 1 A |
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LED signage |
The red LED is charging, and the blue LED is fully charged. |
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Protection function |
Short circuit/overcurrent/overvoltage/overheat/reverse connection protection |
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appendix |
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Current test lead |
One red and one black wire, with a cross-sectional area of 4 mm² . |
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Voltage test leads |
One red and one black wire, with a cross-sectional area of 2.5 mm². |
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charger |
1 dedicated charger |
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standard resistor |
One 2.5 mΩ standard test resistor |
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Chassis dimensions |
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Computer case |
430 mm * 340 mm * 190 mm (Length * Width * Height) |
Product feature and application
DC resistance measurement of various power distribution transformers and instrument transformers ;
The entire machine is controlled by a high-speed chip , has a high degree of automation, and is easy to operate;
Powered by a brand-new lithium battery , it offers multiple current levels, high output voltage, and fast magnetization, saving measurement time. The maximum output current can reach 20A , the maximum output voltage can reach 20V , and the resistance measurement range can reach 1mΩ~20kΩ .
It has the functions of automatically determining the end of magnetization, automatically locking and saving the resistance value, and eliminating the need for manual judgment;
It can perform continuous measurements on transformers that require gear shifting without shutting down the machine;
It has an automatic measurement function and can automatically select the optimal current level according to the load;
It has comprehensive protection functions and can reliably protect the instrument from the impact of back EMF .
It has a voice broadcast function, which automatically announces the resistance value after the test is completed;
It has an energy recovery function, which can quickly reduce current and demagnetize and recover winding energy, eliminating the risk of being electrified;
OLED displays have no visual dead zones, resulting in clearer images;
It has a built-in power-off storage function , which can store 100 sets of historical test data, which can be viewed at any time ;
Equipped with a Bluetooth interface, it supports BLE 4.0 protocol Bluetooth transmission and is compatible with WeChat mini programs, etc.
Small in size, lightweight, and requiring no additional power supply, it is suitable for outdoor mobile operations.
Prodection details
DC resistance testing of distribution transformers
Current transformer DC resistance measurement
Preventive testing of electrical equipment
Outdoor mobile power testing
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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