ATO Transformer Ohmmeter

ATO Transformer Ohmmeter also called DC resistance tester is used for rapid measurement of DC resistance of transformer windings, motor winding, the reactor winding, arc-suppression coil, PT and other inductive devices. It can be used to check the welding quality of welding joints, short circuit, damaged, lead errors, the state of the tap switch and other issues

(1) Fast measurement speed: adopt advanced dual-power constant current source technology, advanced principles, high stability, can build test current quickly, its test speed is hundreds of times of the bridge.

(2) Discharge quickly: Built-in fast discharge circuit, generally only takes a few seconds to complete the discharge, and can dynamically indicate discharge status, which effectively guarantee the personal and equipment safety.

(3) Strong anti-interference: even under a serious disturbance in the environment, the last data can be stabilized at a word.

(4) Safe to use: when test the DC resistance of load voltage regulating transformer, it can switch the tap switch position during the test, and will not cause equipment damage, safe and reliable. 

ATO Transformer Ohmmeter also called DC resistance tester is used for rapid measurement of DC resistance of transformer windings, motor winding, the reactor winding, arc-suppression coil, PT and other inductive devices. It can be used to check the welding quality of welding joints, short circuit, damaged, lead errors, the state of the tap switch and other issues

ATO Transformer Ohmmeter's technical Data:

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Q: What is BDV test for distribution transformer?
A: When you say BDV you might mean the dielectric strength of transformer oil. A new transformer oil should have at lest a dielectric strength of 39 KV. from a British standard.Transformer oils used are normally tested using ASTM D877-82 with the KV strength tester using 1" electrodes spaced 0.1" apart and the test voltage increased at 3,000 volts/min until it breaks down. The average Kv obtained after 8 trials is considered the Oil dielectric strength.
Using this test method,dielectric strength at 30 kv and above is considered good. Dielectric strength between 23 to 29Kv is considered usable, but requires filtering. Below 23 kv, the transformer oil should be replaced. Another method ASTM D18747-82 uses the small radius electrodes but spaced only .o4 inches. The test voltage is 500volts/min and increased until breakdown. The dielectric strength is still the average Kv obtained in 8 trials. The dielectric strength of 28-29Kv is considered good. Below 28 kv, the transformer oil is usable but requires filtering. The latter method is considered a better test method.

Chongqing Assen Power Equipment Co.,LTD, which is professional in design, manufacture, sale of oil purification equipment, relevant testing instruments and provide comprehensive filtering solution, owns advanced production lines and sophisticated detection equipment, first-class R & D staff , professional workers and High-quality sales and service teams

Our Product: Double Stage Transformer Oil Purification system, Vacuum Lubricating Oil Purification, Vacuum Turbine Oil Conditioner, Portable Oil Purifier, Singe Stage Insulating Oil Purifier, Water Oil Separator, Light fuel Oil Purifier, and Fully-auto Dielectric Oil Tester, Turn ratio Tester, Acid Tester, Moisture Detector, Interfacial Tension Tester, etc.

Our Service: special filter technology consulting and solutions sector; fast after-sale service feedback system, well-trained service engineer; hands-on training and large-scale equipments operation myrmidon; regularly visit system, CRM customer relationship management system; rapid Filter wearing parts and spare parts supply system.