The DC resistance of the transformer is a must-measure item for semi-finished products and finished products in the manufacture of transformers, installation test, hand-over test, and preventive test for the power sector. It can effectively discover the selection of transformer coils, welding, loose connection parts, missing strands, and broken wires. Defects and hidden dangers after running. In order to meet the needs of rapid measurement of DC resistance of transformers, Jinyuan Company has developed a new generation of JYR series DC resistance tester using its own technological advantages. DC resistance tester adopts new power supply technology, featuring small size, light weight and large output current. The whole machine is controlled by a single-chip microcomputer and automatically completes functions such as self-checking, data processing, and display. It also has functions such as automatic discharge and discharge audible alarm indication. The instrument has high measuring accuracy and is easy to operate. It can realize fast measurement of the DC resistance of the transformer.
DC Resistance Tester Safety Measures
1. Be sure to read this manual carefully before using the DC resistance tester .
2. The operator of the instrument should have general knowledge of the use of general electrical equipment or instruments.
3, the instrument can be used indoor and outdoor, but should avoid the rain, corrosion gas, dust, high temperature, direct sunlight and other places.
4, the instrument is a high-precision instrument, should avoid severe vibration.
5, maintenance, maintenance and commissioning of this instrument should be carried out by professionals.
6. After the test is completed, be sure to wait for the discharge alarm to stop and then turn off the power and remove the test line.
7. When measuring a no-load regulator transformer, be sure to wait for the discharge alarm sound to stop before switching the transformer gear position.
8. During the test, it is forbidden to disassemble and move the test clips and power supply lines.
DC resistance tester performance characteristics
1. The instrument automatically selects the output current (up to 10A can be output).
2, the measurement range is wide (0Ω-100Ω), can measure transformer, transformer and other inductive DC resistance.
3, the display uses 480 * 272 dot matrix 65K color large-screen display data clear and easy to read.
4, the instrument with perpetual calendar, 100 groups of data storage, automatic temperature conversion and other functions, shut down without losing data. This machine also has a printer that can output print test data. The "U disk" interface facilitates the export of data for viewing and editing.
5, the instrument has a RS485 communication interface, with the host computer control software to achieve remote control measurement.
6. The DC resistance tester has three identical measurement functions to deal with the three-phase direct resistance measurement of the star connection winding one-time wiring and automatically calculate the three-phase unbalance ratio, which greatly saves the measurement time and improves work efficiency. Phase-by-phase testing can also be used to perform phase-by-phase testing for transformers with YN and D(Y) connections. The test is completed and the three-phase imbalance rate is automatically calculated.
The instrument is also equipped with an automatic magnetic assist function. The test is performed on the low-voltage, corner-jointed transformer windings of cores. The high- and low-voltage string excitation method is used for testing. The internal magnetic loop of the windings is connected automatically to quickly and accurately test the low-voltage windings. DC Resistance.
7, the machine has a sound discharge alarm, clear discharge instructions, reduce misuse.
8, the machine has the input misconnection AC380V power protection alarm protection function, to reduce the damage caused by the misuse of the instrument, the machine also has a perfect back-EMF protection and strong arc resistance.
9, DC resistance tester has a wide temperature range, high precision, shock, anti-jamming, high stability, easy to carry and so on.
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