| ZGY-III DC Resistance Tester |
I. Overview
The DC resistance of transformers is a mandatory test item in transformer manufacturing for semi-finished products, factory acceptance tests of finished products, installation, handover tests, and preventive tests by power departments. It can effectively detect manufacturing defects such as poor material selection, welding issues, loose connections, missing strands, broken wires in transformer coils, as well as hidden dangers after operation. To meet the need for rapid measurement of transformer DC resistance, our company has developed this instrument using our technical advantages. This instrument adopts brand-new power supply technology, featuring small size, light weight, large output current, and automatic adjustment based on load size. The whole machine is controlled by a microcontroller, automatically completing self-check, data processing, display, printing, and other functions, with automatic discharge and discharge indication. The DC resistance tester has high measurement accuracy and is easy to operate, enabling rapid measurement of transformer DC resistance.
II. Safety Measures
1. Read this manual carefully before using this instrument.
2. The operator of the instrument should have general knowledge of electrical equipment or instruments.
3. This instrument can be used indoors and outdoors, but should avoid places with rain, corrosive gases, excessive dust, high temperature, direct sunlight, etc.
4. Maintenance, care, and adjustment of the instrument should be performed by professionals.
5. After testing, wait until the discharge alarm sound stops before turning off the power and removing the test leads.
6. When measuring no-load tap-changing transformers, wait until the discharge indication alarm sound stops before switching gears.
III. Performance Features of the DC Resistance Tester
1. The instrument has large output current, wide measurement range, small size, and light weight.
2. The current output automatically adjusts according to the measured resistance value, jumping to the appropriate range, avoiding errors caused by improper current selection.
3. It has a complete protection circuit and high reliability.
4. Vertical case structure, convenient for field operation.
5. It has audible discharge alarm, clear discharge indication, reducing misoperation.
IV. Technical Specifications
1. Output current: 10A automatic continuous adjustment
**Automatic continuous adjustment
1A automatic continuous adjustment
2. Range: 10A automatic continuous adjustment gear: 1mΩ～2Ω
DC resistance tester **automatic continuous adjustment gear: 1mΩ～4Ω
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