30A DC Resistance Tester - Three-Level Commissioning Equipment List Product Features
1. Fast measurement speed: This instrument outputs a maximum constant current of 10A. During measurement, it effectively compensates for the current inertia of large inductive equipment, accelerates core saturation, thereby shortening charging time and improving measurement speed, which is hundreds of times faster than traditional single-arm and double-arm bridges.
2. High accuracy: This instrument uses advanced single-chip microcomputer technology with high-power, high-precision program-controlled constant voltage and constant current, maintaining a relatively stable charging current for inductive loads, ensuring stable anti-inductance capability and strong anti-interference, thus guaranteeing 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 comparative analysis, automatic zero calibration, and is equipped with anti-arcing and data analysis circuits. It automatically outputs and prints measurement data, with menu operation and human-machine dialogue, making operation and reading extremely convenient.
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 testing, 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 testing, avoid power outages or test clamp detachment.
5. Connect the ground wire before turning on the power, and disconnect the ground wire last after testing.
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 contact at each position of the tap changer is good;
3. To check whether there are any broken points in the windings or leads;
4. To check the correctness of parallel branches, whether there are one or more broken wires in windings made of several parallel conductors;
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".
