30A DC Resistance Tester- Three-level Testing Equipment List
1. Fast measurement speed: This instrument outputs a maximum constant current of 10A, which effectively compensates for the current inertia of large inductive equipment during measurement, accelerates core saturation, thereby shortening charging time and improving measurement speed, which is hundreds of times faster than traditional single and double-arm bridges.
2. High accuracy: This instrument uses advanced microcontroller-based high-power, high-precision programmable constant voltage and constant current technology, keeping the charging current for inductive loads at a relatively stable value, with stable anti-inductance capability and strong anti-interference ability, thereby ensuring measurement accuracy.
3. This instrument has a high degree of intelligence, compact structure, and novel and reasonable layout. In addition to adopting the advanced four-terminal measurement method, it also uses dual-channel programmable comparison analysis, automatic zero adjustment and calibration, and is equipped with circuits for arc prevention and data analysis, automatically outputting and printing measurement data, with menu operation, human-machine dialogue, making operation and reading extremely convenient.
30A DC Resistance Tester - Three-level Testing Equipment List Precautions:
1. Before changing the tap position of an unloaded on-load tap changer transformer, be sure to reset. After discharge is completed, the discharge prompt sound ends, and only after the prompt message disappears should you switch the tap changer.
3. After the test is completed, press the "Reset" button, and be sure to wait until the discharge indicator light goes out and the prompt message disappears before turning off the power and disconnecting the wires.
4. During the test, avoid power outages or detachment of test clamps.
5. Before connecting the power supply, connect the ground wire first; after the test, disconnect the ground wire last.
Product Introduction:
It is an essential test item for transformers after handover, major repair, and changing tap switches. The "Regulations" stipulate that during transformer handover, major repair, minor repair, tap position changes, fault inspection, and preventive tests, the DC resistance of transformer windings must be measured. The purposes are:
1. Check the welding quality of internal winding wires and leads;
2. Check whether the contacts at each position of the tap changer are good;
3. Check whether there are any broken points in the windings or leads;
4. Check the correctness of parallel branches, whether there is a situation where one or more breaks occur in windings made of several parallel wires;
5. Check for short circuits between layers and turns.
Using brand-new power supply technology, it has the characteristics of rapid measurement, compact size, convenient use, and high measurement accuracy. It is an ideal device for measuring DC resistance of transformer windings and high-power inductive equipment.
