【Product Introduction】
The three circuit transformer DC resistance tester is made of high-strength insulation materials and precision electronic components, and realizes efficient detection of multi-winding resistance parameters through three-channel synchronous sampling technology. Its core adopts the four-terminal measurement method, injects stable DC current into the winding under test through a constant current source, uses a high-sensitivity voltage detection module to capture the winding voltage drop, and combines intelligent algorithms to eliminate contact resistance interference to ensure μΩ-level measurement accuracy.
Technical Parameters
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Measurement method |
Single-phase (two-phase) |
three-phase |
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Current gear |
1A |
5A |
10A |
20A |
40A |
1A |
5A |
10A |
20A |
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measuring range |
10mΩ～20Ω |
1mΩ～4Ω |
1mΩ～2Ω |
1mΩ～1Ω |
1mΩ～0.5Ω |
10mΩ～6Ω(per phase) |
1mΩ～1Ω(per phase) |
1mΩ～0.6Ω(per phase) |
1mΩ～0.3Ω(per phase) |
|
Maximum resolution |
0.1μΩ |
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Measurement accuracy |
± 0.2% (full range) ± 2 words |
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Data storage capacity |
150 sets |
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Power Supply |
AC 220V±22V,50Hz±2 Hz |
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work environment |
Environmental temperature: 0 ℃~40 ℃ Relative humidity: ≤ 80% RH |
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Nickname:DC Winding Resistance Tester,Resistance Meter,Three-circuit Transformer DC Resistance Tester
Product Features
Efficient Measurement
The three-circuit design of the three-circuit transformer dc resistance tester can detect three windings at the same time, and the working efficiency is three times higher than that of the traditional single-circuit tester.
Large-capacity Storage
The three-circuit transformer dc resistance tester has a powerful storage function and can accommodate 150 sets of data.
Adapt To Various Environments
The three-circuit transformer dc resistance tester can operate stably under the conditions of 0 ℃ ~40 ℃ ambient temperature and relative humidity ≤80 % RH.
Fault analysis and troubleshooting
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Fault phenomenon |
Cause analysis |
Exclusion method |
remarks |
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No display when turned on |
The power supply is not connected |
turn on electricity |
When replacing the fuse, it should be replaced with the same model of fuse and cannot be replaced with other models |
|
Instrument 10A fuse not installed properly or disconnected |
Reinstall or replace the fuse |
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No current output |
Open circuit of the equipment to be inspected |
Check and troubleshoot the equipment |
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There is an open circuit fault in the test circuit |
Check the test circuit and eliminate open circuit faults |
Product Application
Power Industry
The three circuit transformer dc resistance tester is mainly used for preventive maintenance of power grid transformers. It accurately measures the DC resistance of the winding to determine the integrity of the conductive circuit and prevent local overheating or short circuit failures caused by poor contact.
Rail Transit
In the railway traction power supply system, the three circuit transformer dc resistance tester performs regular testing of locomotive transformers to ensure that the resistance value of the traction circuit meets the standard and ensures the continuous power output stability of high-speed rail EMUs.
New Energy Field
The three circuit transformer dc resistance tester is used for photovoltaic/wind farm step-up transformer testing. Through the three-circuit synchronous measurement technology, the resistance value of complex winding structures can be quickly analyzed.
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