News Details

DC Resistance Tester with Printing - Three-Level Acceptance Equipment List Notes:

1. Before switching the tap changer of an unloaded tap-changing transformer, ensure to reset. After discharge is complete, the discharge tone ends, and the prompt message disappears before switching the tap changer.

3. After the test, press the "Reset" button. Wait until the discharge indicator light goes off and the prompt message disappears before turning off the power and disconnecting the wires.

4. During the test, avoid power interruptions or the test clamp falling off.

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 the DC resistance of transformer windings must be measured during handover, major repair, minor repair, tap position changes, fault inspection, and preventive tests. The purposes are:

1. Check the welding quality of internal winding conductors and leads;

2. Check whether the contacts at each position of the tap changer are good;

3. Check for any broken wires in the windings or leads;

4. Check the correctness of parallel branches, whether there is a break in one or more places in a winding made of several parallel conductors;

5. Check for short circuits between layers and turns.

Using brand-new power supply technology, it features fast 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.

It complies with the requirements of national standards GB6587-86 "General Outline of Environmental Testing for Electronic Measuring Instruments" and GB6593-86 "Rules for Quality Verification of Electronic Instruments".

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. It is hundreds of times faster than traditional single/double-arm bridges.

2. High accuracy: This instrument uses advanced microcontroller-based high-power, high-precision programmable 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 has a high degree of intelligence, compact structure, and novel layout. In addition to using the advanced four-terminal measurement method, it also adopts dual-channel programmable comparison analysis, automatic zero calibration, anti-arcing and data analysis circuits, automatic output and printing of measurement data, menu operation, human-machine dialogue, making operation and reading extremely convenient.