1.The instrument provides 6-gear output current selection and an automatic gear. The maximum output current is 10A, which is specially designed for accurate dc winding resistance measurement of various inductive equipment windings.
2.It is applicable to inductive test objects such as transformer, mutual inductor, reactor, generator, motor, etc., and can also be used for 3 phase winding resistance measurement of transformers, as well as test objects such as switches, copper bars, contactors, relay contacts, metal wires, cable accessories, etc
3.With perpetual calendar, 99 groups of data storage, automatic temperature conversion and other functions, no data loss after shutdown
4.A printer can output and print test data
Product Introduction
Transformer dc winding resistance tester (10A type) is a professional instrument for transformer dc winding test, and the tested data is a necessary test item for semi-finished and finished products in transformer manufacturing, including factory testing, installation, overhaul, change of tap changer, handover testing, and preventive testing by the power department. It can check the welding quality of the winding joints and whether there is any inter turn short circuit in the winding. It can also check whether the contact at various positions of the voltage tap changer is good, whether the actual position of the tap changer matches the indicated position, whether the outgoing wire is broken, and whether there are broken strands when multiple wires are wound together.
Product Parameter
|
Model |
JH2810 |
|
Working power supply |
220V (AC) |
|
Output current |
1mA, 10mA, 100mA, 1A, 5A, 10A, automatic |
|
Measuring range |
0-20k Ω |
|
Minimum resolution |
1u Ω |
|
Weight |
8kg |
|
Accuracy |
±(0.2% RD+0.05% FS) |
Safety Measures
1. Be sure to read this manual carefully before using this instrument.
2. This instrument can be used both indoors and outdoors, but it should be avoided in places such as rain and corrosive gases.
3. The instrument should avoid severe vibration.
4. The maintenance, care, and adjustment of instruments should be carried out by professional personnel.
5. After the test is completed, it is necessary to reset the instrument and turn off the power before removing the test wire.
6.During the testing process, it is prohibited to move the test clamp and turn off the power supply line.
Product Accessories
- A portable hard case
- A black carrying bag
- A set of dedicated test leads (red, black, and multi-color)
- Three spare fuses
- A USB cable
- Two rolls of printing paper
- A set of red and black adapter cables with alligator clips
- A set of black test leads with large alligator clips
Prodect Qualification
Deliver, Shipping and Serving
FAQ
Q: Why is it necessary to handle the contact between the test clamp and the sample before testing, and how to operate it?
A: Long-term exposure of the contact between the test clamp and the sample will form an oxide film, leading to unstable and inaccurate measurement results. You can clean the oxide layer on the contact end directly, or twist the test clamp firmly after clamping the sample to break the oxide film physically and ensure good contact.
Q: The instrument supports both AC and DC power with a built-in lithium battery. How to maintain the battery when not in use for a long time?
A: When the instrument is idle for a long time, it is recommended to charge the lithium battery once a month to avoid damage due to over-discharge. Use the supporting power adapter for charging, and stop charging after the battery is fully charged to ensure normal power supply when reused.
Q: What are the necessary steps before removing the test leads after the test, and why?
A: After the test, press the "Stop" key to reset the instrument, confirm no current output and complete discharge, then turn off the power and remove the test leads. If the test leads are removed directly without discharge, the back electromotive force from inductive samples may damage the internal circuit of the instrument and pose safety risks.
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