30A DC Resistance Tester - Three-Level Commissioning Equipment List Product Features
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, hundreds of times faster than traditional single/double-arm bridges.
2. High accuracy: This instrument uses advanced microcontroller-based high-power, high-precision program-controlled constant voltage and constant current technology, maintaining a relatively stable charging current for inductive loads, with stable anti-inductance capability and strong anti-interference, thus ensuring measurement accuracy.
3. This instrument features a high degree of intelligence, compact structure, and novel layout. In addition to adopting the advanced four-terminal measurement method, it also uses dual-channel program-controlled comparison analysis, automatic zero calibration, and includes circuits for arc prevention and data analysis, automatically outputting and printing measurement data, with menu operation, human-machine dialogue, and extremely convenient operation and reading.
30A DC Resistance Tester-Three-Level Commissioning Equipment List Precautions:
1. Before switching the tap changer of an on-load tap-changing transformer, be sure to reset. After discharge is complete, wait until the discharge prompt sound ends and the prompt message disappears before switching the tap changer.
3. After the test, 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 test clamp detachment.
5. Connect the ground wire before turning on the power, and disconnect the ground wire last after the test.
Product Introduction:
It is an essential test item for transformers after handover, major repair, and tap changer changes. 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. To check the welding quality of internal winding conductors and leads;
2. To check whether the contacts at each position of the tap changer are in good condition;
3. To check for any broken wires in the windings or leads;
4. To check the correctness of parallel branches, whether there are one or more broken circuits in windings made of several parallel wires;
5. To check for short circuits between layers or turns.
Using brand-new power supply technology, it features rapid measurement, compact size, convenient use, and high measurement accuracy. It is an ideal device for measuring the DC resistance of transformer windings and high-power inductive equipment.
It complies with the requirements of national standards GB6587-86 "General Outline of Environmental Tests for Electronic Measuring Instruments" and GB6593-86 "Quality Inspection Rules for Electronic Instruments".
