ZGY-IV Three-Channel Transformer DC Resistance Tester k761ZGY-IV Three-Channel Transformer DC Resistance Tester k761ZGY-IV Three-Channel Transformer DC Resistance Tester k761ZGY-IV Three-Channel Transformer DC Resistance Tester k761
I. Overview of Three-Channel Transformer DC Resistance Tester
The three-channel DC resistance tester is a mandatory test item for semi-finished and finished products in transformer manufacturing, factory acceptance tests, installation, handover tests, and preventive tests by power departments. It can effectively detect manufacturing defects such as improper material selection, welding, loose connections, missing strands, broken wires in transformer coils, and hidden dangers after operation. To meet the need for rapid measurement of transformer DC resistance, Ficote Company has developed the ZGY series DC resistance tester using its own technical advantages. This instrument adopts new power supply technology and features small size, light weight, and large output current. The whole unit is controlled by a microcontroller, automatically completing self-check, data processing, display, and other functions, with automatic discharge and discharge indication. The instrument has high testing accuracy and is easy to operate, enabling rapid measurement of transformer DC resistance.
Product Aliases: DC resistance quick tester, transformer DC resistance tester, transformer winding DC resistance tester, transformer DC resistance quick tester, transformer DC resistance fast tester, inductive load DC resistance quick tester, inductive load DC resistance fast tester, inductive load DC resistance tester, three-circuit transformer DC resistance tester, three-channel transformer DC resistance tester
The ZGY-IV three-channel DC resistance tester (20T) adopts a dual power supply structure. For transformers with tap changers and YN connected windings, it enables simultaneous power application to three phases. The measurement system uses independent three-channel current sampling and independent three-channel voltage sampling, simultaneously measuring and displaying three-phase resistance values and three-phase unbalance rate. This greatly shortens working time and solves the problem of long testing time for DC resistance of each tap winding in power transformers, requiring only 1/3 of the time of traditional methods.
II. Safety Measures for Three-Channel Transformer DC Resistance Tester
1. Be sure to 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 rain, corrosive gases, excessive dust, high temperature, direct sunlight, and other places.
4. The instrument should avoid severe vibration.
5. Maintenance, care, and adjustment of the instrument should be carried out by professionals.
6. After testing, be sure to wait until the discharge alarm sound stops before turning off the power and removing the test leads.
7. When measuring no-load tap-changing transformers, be sure to wait until the discharge indication alarm sound stops before switching gears.
8. During testing, moving the test clamps and power supply lines is prohibited.
III. Performance Characteristics of Three-Channel Transformer DC Resistance Tester
1. The instrument has large output current and automatic current selection, making operation simple.
2. Three-channel measurement with real-time acquisition, simultaneously measuring three resistance values and calculating three-phase resistance unbalance.
3. It can measure three phases simultaneously or use traditional single-channel measurement, and also has temperature conversion function for convenience.
4. It has a comprehensive protection circuit and high reliability.
5. Equipped with non-volatile calendar, clock, 80 sets of data storage, recall, and printing functions.
6. It can set printing information such as phase sequence and tap position of the resistance.
7. Vertical case structure for easy field operation.
8. It has audible discharge alarm and clear discharge indication to reduce misoperation.
IV. Technical Specifications of Three-Channel Transformer DC Resistance Tester
1. Output current: Automatic current selection (20A)
2. Output voltage: DC12V
3. Measurement range: 0～100Ω
4. Accuracy: 0.2%±1μΩ
5. Resolution: 0.1μΩ
6. Operating temperature: -20～40℃
7. Ambient humidity: ≤80%RH, no condensation
8. Power supply: AC220V±10%, 50Hz±1Hz
9. Length 440mm, width 240mm, height 390mm Net weight: 15kg
