The DC resistance of the transformer is a must-test item for the semi-finished products in the transformer manufacturing, the factory test, the installation, the handover test and the preventive test of the power sector. It can effectively find the selection of the transformer coil, the welding, the loosening of the joints, the lack of strands, the wire breakage, etc. Defects and hidden dangers after running. The instrument uses a new power supply technology, featuring small size, light weight and large output current. The whole machine is controlled by single-chip microcomputer, which automatically completes functions such as self-test, data processing and display, and has automatic discharge and discharge indication functions. The instrument has high test accuracy and easy operation, and can realize rapid measurement of the direct resistance of the transformer. The dual power supply structure is used to connect the windings of the transformer YN with tapping to realize three-phase simultaneous power-on. The measuring system adopts independent three-channel current sampling and independent three-channel voltage sampling, and simultaneously measures and displays three-phase resistance values ​​and three-phase unbalance. rate. The working time is greatly shortened, and the problem that the DC resistance test of each tap winding of the power transformer takes a long time is solved, and the time required is only 1/3 of the conventional method.
â—†Three-channel DC resistance tester DC resistance tester performance characteristics
1. The instrument output current is large and the current is automatically selected for easy operation.
2. Three-channel measurement, real-time acquisition, simultaneous measurement of three resistance values, and calculation of three-phase resistance imbalance.
3, can be measured simultaneously in three phases, can also be measured in a single channel according to the traditional method, and has a temperature conversion function, easy to use.
4. It has perfect protection circuit and strong reliability.
5, with no power cycle, clock, 80 sets of data storage, access, printing functions.
6, you can set the phase sequence of the resistor, the tap position and other print information.
7, vertical chassis structure, easy to operate on site.
8, with audio discharge alarm, clear discharge indication, reduce misuse.
â—†Three-channel DC resistance tester DC resistance tester technical indicators
1, output current: automatic selection of current (maximum 20A)
2, the output voltage: DC12V
3, range: 0 ~ 100Ω
4. Accuracy: 0.2%±0.5μΩ
5, the minimum resolution: 0.1μΩ
6, working temperature: -20 ~ 40 ° C
7, ambient humidity: ≤ 80% RH, no condensation
8, working power: AC220V ± 10%, 50Hz ± 1Hz
9, length 330mm width 230mm height 270mm
10, net weight: 10kg
Serving Fork,Dining And Serving Forks,Meat Serving Fork,Salad Serving Fork
Taizhou Polybest Household Product Co.,Ltd , https://www.polycutlery.com