40A Transformer Winding Ohmmeter

Model: TWO-140S

Transformer Winding Ohmmeter is designed to measure the dc resistance of all types of magnetic windings accurately. It can test transformers and rotating machine windings and perform low-current resistance measurement on connections, contacts and control circuits.

Main Features

1) Adopt 4-wire method for resistance measurement

2) DC test current up to 40 A maximum

3) User-selectable maximum current range

4) Resistance measurement from 50μΩ to 20kΩ

5) Fast auto safety discharge circuit

6) Able to download test results via USB interface

7) Able to print the test results directly via built-in printer

Technical Data

◇DC output range: 40A, 20A, 10A, 5A, 2.5A, <20mA

◇Resistance measurement

50μΩ-500mΩ @ 40A

100μΩ-1Ω @ 20A

500μΩ-2Ω @ 10A

1mΩ-4Ω @ 5A

2mΩ-8Ω @ 2.5A

10Ω-20kΩ @ <20mA

◇Measuring accuracy: ±0.2% reading ± 2μΩ

◇Resolution: 0.1μΩ

◇320×240 colour LCD screen for display

◇USB port for downloading results

◇Built-in printer for printing test results directly

◇Max. memory capacity: 1000 test results

◇Power supply: AC220V/230V±10%, 50Hz/60Hz optional

◇Dimension: 400x225x350mm(15.75x8.86x13.78 in)

◇Weight: 13kg(28.67 lb)

◇Environmental Conditions

storage temperature: -20℃~60℃

humidity: <90%

operating temperature: -10℃~50℃

◇Safety Qualifications and EMC

Safety: designed in accordance with IEC61010-1

EMC: light industrial IEC 61326

Transformer Winding Ohmmeter TWO-140S is ideal tool for measuring winding resistance of power transformer.

HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD, as a subsidiary of HAOMAI ELECTRIC POWER AUTOMATION CO.,LTD, located in Shenzhen of China, mainly focuses on the sales and services of Protection Relay Test Set, Instrument Transformer Test Set, CT/PT Analyzer, Power Transformer Test Set, Circuit Breaker Testing Equipment, Battery Testing Equipment, IEC 61850 Testing Equipment for Smart Substation, Partial Discharge Detector, Transformer Oil Dissolved Gas Analysis and Moisture Monitor etc. electrical test equipment and online monitoring equipment.

The headquarters, HAOMAI ELECTRIC POWER AUTOMATION is established in 1999 and located in Wuhan of China, which is specialized in developing and manufacturing electrical test equipment and online monitoring equipment. HAOMAI products are widely used in power grid, petrochemical, metallurgy, railway, coal mine, research institutes and all kinds of large-scale factories or enterprises.

HAOMAI follows total quality criteria, and always maintains standardized process and procedures for continuous growth. HAOMAI has been certified by ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. All of HAOMAI products passed Type Test or Calibration in the third party laboratory accredited under ISO/IEC 17025.

HAOMAI builds own RELAYSTAR laboratory and performance test laboratory, and possesses professional production equipment and testing instruments in factory, such as Agilent 34401A 6 1/2 High-precision Meter, FLUKE Multi-meter, EMH Standard Meter, CLOU Standard Power Source, Oscilloscope, Phase Meter, Insulation Test System, High Voltage Dividers, AC High Voltage Generator, Time Calibration Tester, Standard Micro-resistance etc.

HAOMAI is China well-known mark recognized and approved by State Administration for Industry & Commerce of People's Republic of China, and enjoys high reputation in domestic and foreign markets.

HAOMAI now is the key supplier for SGCC(State Grid Corporation of China) and CSG(China Southern Power Grid). Till 2021 HAOMAI products have been sold to 39 different countries.

HAOMAI always sticks to the faith of "cooperation and sharing", takes the "technology and market" as the direction, "creation and innovation" as the soul, listens to clients carefully, and improves the technology, upgrades the products, optimizes the service and tries all to be the global leader in electrical test and measurement instruments field.