DC Winding Resistance Tester 10A 5A
General Information:
DC resistance test is a must-test item for semi-finished products, finished products factory test, installation, handover test and preventive test of power sector in the manufacture of inductive coils such as transformers, mutual inductors, reactors, electromagnetic operating mechanisms, etc. It can effectively discover the selection and welding of inductive coils, Loose connection parts, missing strands, broken wires and other manufacturing defects and hidden dangers after operation. It is also an essential test item for transformers after handover, overhaul and change of tap changer. At the same time, similar to dry-type transformers and amorphous alloy transformers, since the low-voltage coils are wound with copper foil, the resistance value is extremely low, which brings high precision and resolution requirements to the test. Under normal circumstances, testing the DC resistance of transformer windings and high-power inductive devices by traditional methods (bridge method and voltage drop method) is a time-consuming and labor-intensive task. In order to meet the needs of fast testing of inductive coil DC resistance, improve the test accuracy of DC resistance, shorten the test time and reduce the testing burden of testers, this DC resistance tester has been developed. The maximum output current range of EPWT-10B is designed to be 10A, which solves the problem of low-value resistance testing. At the same time, for high-resistance samples such as transformers, the meter also extends the DC resistance test range to 1MΩ, which is an ideal device for testing the DC resistance of transformer windings and high-power inductive equipment.
The EPWT-10B Transformer Winding Resistance Tester also adopts 5.6-inch color LCD display, simple and beautiful operation interface, built-in rechargeable lithium battery and charging circuit, with high-speed microcontroller as the core, combined with high-speed A/D converter and program-controlled current source technology, with resistance temperature conversion function , In circuit design, it has a variety of protection functions such as back EMF protection, disconnection protection, power failure protection, and overheating alarm. In order to achieve high-precision, high-stability, high-speed testing, it also has the characteristics of self-test, automatic discharge, large output current, wide range, strong anti-interference ability, fast charging and discharging speed, data analysis and processing, and discharge indication.
Main technical data table:
|
Function |
Transformer winding resistance test, low resistance test, equipotential bonding resistance test, metal connection resistance test, micro-ohmmeter |
|
Power Supply |
Built-in: 14.8V 7800mAh rechargeable lithium battery; External: AC 220V/2A 50Hz/60Hz |
|
Test Method |
four-wire method |
|
Charger |
16.8V/2A charger |
|
Display Mode |
5.6-inch LCD color screen, 640dots×480dots, display area 116mm×88mm |
|
Test Interface |
I+ (current positive), I- (current negative), U+ (voltage positive), U- (voltage negative) |
|
Output Current |
10A, 5A, 1A, 400mA, 200mA, 40mA, <5mA |
|
Range (Mains 220v) |
500 |
|
1m |
|
|
10m |
|
|
25m |
|
|
200m |
|
|
1 |
|
|
10Ω~1MΩ （Constant voltage <5mA） |
|
|
range (Built-in battery) |
500 |
|
1m |
|
|
10mΩ~12 |
|
|
25m |
|
|
200m |
|
|
1 |
|
|
1Ω~1MΩ （Constant voltage 12V <5mA） |
|
|
Max. resolution |
0.1 |
|
Test accuracy |
Constant current file: 0.1%; Constant pressure gear: 2% (23 |
|
Overrange prompt |
--OL-- |
|
Discharge Tips |
After the test, the buzzer sounds to indicate that the discharge is in progress, and the buzzer stops after the discharge is completed. |
|
Printer |
The instrument panel is embedded with a printer, press the print button to print the test results |
|
Data Storage |
After the test is completed, the data is automatically saved, and the cycle is saved, which can store 9999 sets of data |
|
Meter Size |
About 320mm(L)×275mm(W)×145mm(H) |
|
Package Size |
About 400mm(L)×245mm(W)×335mm(H) |
|
Quality |
Instrument: about 9.2kg (including packaging) |
|
Toolbox |
Tool box can bear 200kg |
|
Test Line |
Both ends of the test lead are tapped, and the wiring is simple |
|
Current |
Constant current Constant voltage: <5mA Also has Auto automatic shifting |
|
Output Power |
150 watts max |
|
Data Deletion |
In the data review column, you can choose to delete the current data or delete all data |
|
Data Access |
Press the up and down keys to browse the stored data in the data review bar |
|
Firmware Upgrade |
The user can upgrade the instrument program through the U disk |
|
Automatic Shut-Down |
When using battery power, it will automatically shut down after about ten minutes of no operation. |
|
Battery Voltage |
There is a battery indicator on the upper right corner of the meter. When
the symbol “ |
|
Temperature Conversion |
The instrument automatically processes the test data and has the function of resistance temperature conversion |
|
Data Transmission |
It can be transmitted through RS232, U disk, Bluetooth, etc. |
|
Backlight |
Backlight can be set to high, medium and low brightness |
|
Test Type |
Optional Cu, Al material |
|
Converted Temperature |
The tested resistance value can be converted to the resistance value at two temperatures of 75°C and 15°C |
|
Tap |
00-99 can be set |
|
Working Current |
The working current is 200mA in the non-test state |
|
Circuit Protection |
With back EMF protection, disconnection protection, power failure protection, overheating protection, etc. |
|
Working Temperature And Humidity |
-20 |
|
Storage Temperature And Humidity |
-10 |
|
Suitable For Safety Regulations |
IEC61010-1, CAT |
More details on Transformer DC Winding Resistance Tester, Transformer Ohmmeter Please contact Wuhan EP Hipot Electric.