Product introduction
The DC winding resistance tester is a professional test instrument used to detect the winding resistance of power equipment such as transformers and mutual inductors. It is widely used in power system maintenance, equipment maintenance and factory inspection. Its working principle is based on Ohm's law, and the resistance value is calculated by measuring the voltage drop generated when current is applied.
Product features
1000 Test Record Storage Capacity
The instrument has a powerful storage function and can store up to 1000 test records, which allows users to record a large amount of test data for a long time and continuously without connecting external devices, which is convenient for subsequent data collation, analysis and equipment status tracking.
Built-in Large-capacity Lithium Battery
The DC winding resistance tester has a built-in large-capacity lithium battery and supports DC power supply, making the instrument lighter and reducing the constraints of power supply cables. It allows operators to switch positions more flexibly during on-site inspections, especially suitable for use outdoors or away from power sources.
Five-speed Current Selection
The DC winding resistance tester provides five current gears: automatic, 5A, 1A, 100mA and 1mA to meet different testing needs. The multi-speed current selection design allows users to flexibly adjust the current when measuring low-resistance or high-resistance devices, ensuring data stability and accuracy. For example, when measuring the low-resistance winding of a large transformer, a higher current range (such as 5A) can be selected to obtain higher measurement accuracy; when detecting the high-resistance winding of a small transformer, a lower current range (such as 1mA) can be selected to avoid equipment loss.
High-precision Measurement
The DC winding resistance tester has a high-precision measurement capability of 0.2% ± 2 digits, which is particularly suitable for power equipment detection requiring high precision. The instrument achieves resistance measurement with extremely small errors through stable current output and high-sensitivity acquisition of tiny voltage signals. This high-precision guarantee is particularly important in daily maintenance and fault diagnosis of equipment. For example, in the preventive maintenance of transformers, accurate resistance measurement can help engineers detect early signs of winding deterioration in time and avoid economic losses caused by downtime due to faults.
Wide Measurement Range And High Resolution
The tester has a wide measurement range, covering the range of 1 micro-ohm to 100 kilo-ohm, with a resolution of up to 0.1 micro-ohm, suitable for resistance measurement of various types of power equipment. Such a measurement range and high resolution design ensure that winding resistance tests can be completed accurately for both small and large devices.
Product parameters
|
type |
Integrated portable |
|
External dimensions |
Length 260mm x Width 160mm x Height 80mm |
|
Instrument weight |
3kg |
|
Built in battery |
DC lithium-ion rechargeable battery for both AC and DC use |
|
Charger input |
AC220V (50 ± 1) Hz output: DC29.4V |
|
ambient temperature |
-10℃～45℃ |
|
relative humidity |
≤ 85% RH without condensation |
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Altitude |
≤ 2000 meters |
|
Instrument power |
The maximum output power of this instrument is 100W (with an open voltage of 20V during 5A current testing) |
|
project |
detailed |
Parameters |
|
electric current |
5A |
Automatic, 5A, 1A, 100mA, 1mA |
|
Display screen shows |
Four and a half people |
|
|
Test current |
5A |
1UΩ~4Ω |
|
1A |
20mΩ~20Ω |
|
|
100mA |
200mΩ~200Ω |
|
|
≤1mA |
20Ω~100kΩ |
|
|
Accuracy |
0.2% ±2digitals |
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