Based on the business philosophy of 'integrity-based, quality-oriented, long-term win-win', our company constantly strengthens product quality management, constantly improves the comprehensive level of customer service and makes every effort to provide customers with high-quality oil purifying machine, sf6 Gas Recovery Unit, oil moisture tester. The business philosophy of our factory is integrity, pioneering and innovation. The company implements a scientific and standardized internal management system, and has a wide range of products and covers a wide range of fields.
1. Application
FUOOTECH produced and exported the FTDC-20A Transformer DC resistance rapid tester since 2005. After continuous improvement and upgrading based on the good suggestions from clients and absorbing the newest technology at home and abroad, FTDC-20A already becomes the newest product for transformer DC resistance test.
This 20A DC Resistance tester adopts new power supply technology, which has the characteristics of small size, light weight, large output current, good repeatability, strong anti-interference ability, perfect protection function and so on.
The whole test equipment is controlled by a high-speed single-chip microcomputer, with a high degree of automation, with automatic discharge and discharge alarm functions. The instrument has high test accuracy and easy operation, and can realize the rapid measurement of transformer direct resistance.
2. When To Measure Winding Resistance?
1). Risk of damage is significant whenever a transformer is moved. This is inherent to the typical transformer design and modes of transportation employed. Damage can also occur during unloading and assembly. The damage will often involve a current carrying component such as the LTC, RA switch or a connector.
Damage to such components may result in a change to the DC resistance measured through them. Hence, it is recommended that the DC resistance be measured on all on-load and off-load taps prior to energizing.
2). If the transformer is new, the resistance test also serves as a verification of the manufacturers work. Installation measurements should be filed for future reference.
3). At routine (scheduled) Transformer Maintenance: routine maintenance is performed to verify operating integrity and to assure reliability. Tests are performed to detect incipient problems.
3. Technical Parameters
|
Items |
Technical parameters |
Notes |
|
Measuring current |
<20mA,1A,2.5A,5A,10A,20A |
|
|
Measuring range |
100μΩ～1Ω (20A) |
Accuracy: ±(0.2%+2) |
|
|
10Ω-20KΩ (<20mA) |
Accuracy: ±(0.5%+2) |
|
Minimum resolution |
0.1μΩ |
|
|
Display |
LED Display |
The resistance shows 4 significant digits |
|
data storage |
1000 list |
|
|
Working environment |
Environment temperature: 0℃～40℃ |
|
|
Power supply |
AC 220V±10V, 50Hz±1 Hz |
Safety tube 10A |
|
Maximum power |
1000W |
|
|
Dimension |
400×225×350(mm) |
|
|
Weight |
Tester box: 15.1KG, Line box: 5.75KG |
|
4. Features
1). The whole machine is controlled by high-speed single chip microcomputer, with high degree of automation and easy operation.
2). The instrument adopts new power supply technology, with many current ranges and wide measurement range, which is suitable for DC resistance measurement of large and medium transformers.
3). The protection function is perfect, which is reliable to protect the impact of back EMF on the instrument, and the performance is more reliable.
4). Intelligent power management technology, the instrument always works in the minimum power state, which can effectively save energy and reduce heating.
5). Sound discharge alarm, clear discharge indication, reduce operation mistakes.
6). Fast response.
7). 320x240 ultra small pixel 65K true color liquid crystal,
8). The instrument is equipped with RS232 and USB interface, which can communicate with computer and store in U disk.
9). The instrument has its own calendar clock and power down memory, which can store 1000 groups of test data and can be consulted at any time
5. Stocks at office
6. Packing, Delivery, Shipping and Payment
7. Certificates
8. Fault inspection and Trouble-shooting
|
Phenomenon |
Reason |
Solution |
|
|
1 |
Green light don't turn on when power switch connected |
Current lines open a circuitPower fuse fusing |
Change power lines |
|
2 |
Red light don't turn on when push the red button |
Pressure regulating potentiometer didn't return to 0 |
Potentiometer return to 0 |
|
3 |
Red light turns on when push the red button, while raise voltage, red light turns off, red light turns on |
High voltage output terminal tester has short circuit |
Check the output electriccable. Check the tested products |
|
4 |
During raise voltage, red light turns off, green light turns on. |
Tester discharge or break-down over voltage or over current protection movement |
Check the tested products reset setting valu |
Welcome to contact us for any inquiry and cooperation by email, phone, WhatsApp, etc.
Our company has a strong brand awareness, advertising in place, we form our own brand, the added value of 10A/20A Transformer DC Resistance Test Set Winding DC Resistance Tester is very high. The company adheres to the business principle of 'honesty and quality', and has achieved good social and economic benefits in the fierce market competition! The company will take brand management as its purpose to realize the unification of brand and quality, technology and technology.
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