DC Winding Resistance Test Meter for transformer test
I. Summary
The measurement of DC resistance is a necessary item infactory test, installation, hand-over test, and preventive test for semi-finished products and finished products during the manufacture of voltage transformers, current transformers, reactors, electromagnetic actuators and other inductive coils in power departments, with which, the manufacturing defects on material selection, welding,joint loosening, strand missing, broken wires and others and hidden dangers under operationcan be identified effectively. In order to satisfy the need for rapid measurement for DC resistance of inductive coils, a HM5002-10ATransformer DC Winding Resistance Tester has been developed with our technical advantages. It is applied with a new power supply technology and has a small size, light weight, large output current, wide measurement range, digital displayand other features. The whole tester is controlled with a single-chip microcomputer and can automatically perform self-test, data processing, display and other functions. It has an automatic discharge and discharge indication functions, as well as high test accuracy and easy operation, and can realize the rapid measurement for DC resistance.
II. Advantage
1. The instrument has large output current and light weight. 2. The instrument provides 7 output current options, the maximum output current being 10A. 3. It is equipped with perfect protection circuit for more reliable performance, and discharge audio alarm to reduce disoperation. 4. The instrument has a wide measuring range (0.5mΩ-100KΩ), where different sample temperatures can be set, and converted resistance value can be calculated automatically. 5. The instrument can calculate the three-phase imbalance rate, providing a quick and intuitive understanding of the stability of the transformer. 6. The instrument is powered by a built-in lithium battery and equipped with an independent charging system, which is convenient for on-site operation. 7. The instrument is equipped with a 7-inch color touch screen with a resolution of 800×480 pixels. It can be configured with Chinese/English operation menus and print the output results in real time. 8. The instrument adopts two power supply modes, i.e. AC and DC, to meet the use requirements of different sites (AC and DC mode involves the same testing and wiring methods except for different power supply modes). 9. With RS232 interface, the test data can be transmitted to the backend. 10. This instrument has a powerful storage function, capable of storing up to 1000 test records. 11. With a USB interface, the test data can be transferred to a USB flash drive. 12. The parameter settings are more comprehensive, allowing for the setting of the transformer's test winding, tap position, test phase, sample temperature, converted temperature value, winding material, etc.
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