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I.Overview
The DC resistance of transformers is a must-test item for semi-finished products and
finished products factory test, installation, handover test and preventive test of the power
department in the manufacture of transformers. It can effectively discover the material
selection, welding, loose connection of the transformer coil, missing strands, broken wires,
etc. Defects and hidden dangers after operation. In order to meet the needs of rapid
measurement of transformer DC resistance, the instrument adopts new power supply
technology, which has the characteristics of small size, light weight, and large output
current. The whole machine is controlled by a single-chip microcomputer, which
automatically completes the functions of self-inspection, data processing, and display, and
has automatic discharge and discharge indication functions. The instrument has high test
accuracy and simple operation, which can realize the rapid measurement of transformer
direct resistance.
The HZ-3220S DC resistance tester is specially designed for temperature rise
measurement of three-core five-column large transformers. The charging and
measurement speed is fast, and it can meet the time requirements of the transformer
temperature rise test. Dual-channel measurement, real-time sampling, print output, Make
the temperature rise test no longer a problem.
II.Precautions
1. Be sure to read this manual carefully before using this instrument.
2. The operator of the instrument should have common sense in the use of general
electrical equipment or instruments.
3. The use of this instrument should be avoided in places such as rain, corrosive gas,
excessive dust, high temperature, and direct sunlight.
4. The meter should avoid severe vibration.
5. The maintenance, care and adjustment of the instrument should be carried out by
professionals.
6. After the test, be sure to wait for the discharge alarm to stop before turning off the
power and remove the test line.
