Product Details

Transformer Tester
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40A Transformer DC Resistance Tester (Repair Qualified)MfrProduct Introduction:

DC resistance tester, also known as DC resistance measuring instrument, DC resistance meter, transformer DC resistance tester, DC resistance detector, DC digital bridge, etc.
Overview: DC resistance testing is an essential test item after transformer handover, overhaul, and tap changer adjustment. Conventionally, measuring DC resistance of transformer windings and high-power inductive equipment using traditional methods (bridge and voltage drop methods) is time-consuming and labor-intensive. To address this, reduce measurement time, and ease operator workload, the DC resistance rapid tester was developed. Using a high-speed microcontroller as the core, with built-in rechargeable batteries and charging circuits, it employs high-speed A/D converters and programmable current source technology to achieve excellent measurement results with high automation. Features include high precision, wide measurement range, stable data, good repeatability, strong anti-interference capability, and comprehensive protection. Fast charge/discharge speed. The instrument is compact, lightweight, and portable. It features rapid measurement, easy operation, and high measurement accuracy. Self-check and auto-calibration functions reduce the difficulty of instrument use and maintenance, making it an ideal device for measuring DC resistance of transformer windings and high-power inductive equipment.
The DC resistance tester offers measurement currents of 1A, 3A, 5A, 10A, 20A, 30A and other ranges. The instrument consists of a constant current power supply and voltage signal detection unit with a 5-digit LCD display. Adjustable output current makes it suitable for DC resistance measurement of various small and medium transformers.

40A Transformer DC Resistance Tester (Repair Qualified)MfrFeature Certificate

1. High-speed 16-bit A/D converter for stable, repeatable measurements.

2. Programmable current source with 1000 ranges, auto-controlled by MCU for wide measurement range.

3. Fast response, tap switch can be changed during measurement.

4. Intelligent design auto-detects loose or broken test leads.

5. Complete back EMF protection with auto discharge indication.

6. Displays measurement current and time.

7. Smart power management reduces internal heating.

8. Stores 120 measurements, non-volatile.

9. Full Chinese menu with operation prompts, intuitive and convenient.

Precautions:

1. Read this manual carefully before using the instrument.

2. Operators should possess general electrical equipment or instrument knowledge.

3. The instrument can be used indoors and outdoors, but avoid rain, corrosive gas, and similar environments.

4. Avoid severe vibration.

5. Instrument repair, maintenance and adjustment should be performed by qualified personnel.

6. After testing, reset the instrument, power off, then remove test leads.

7. Do not move test clips or power supply wiring during testing.

System Introduction

1. AC220 power socket with built-in switch and fuse compartment

2. Ground terminal: ground wire connection terminal

3. I+  I-: output current terminals

4. V+  V-: sampling voltage terminals

5. Use “▲”, “▼”, “”, “” keys for navigation; “” also functions as “Save”.

6. Enter key: confirm current selection. In test mode, press Enter to print data.

7. Cancel key: press to return to previous menu.

8. Reset key: press to return instrument to initial state after test completion or interruption.

Safety Measures

1. Read this manual carefully before using the instrument.

2. Operators should possess general electrical knowledge.

3. Avoid using the instrument in rain, corrosive gas, excessive dust, high temperature, direct sunlight, and similar environments.

4. Avoid severe vibration.

5. After testing, wait until the discharge alarm stops before powering off and removing test leads.

6. When measuring no-load tap-changing transformers, wait until the discharge indicator alarm stops before switching taps.

7. Do not move test clips or power supply wiring during testing.

Note: The above information and technical parameters are compiled and published by Yangzhou Darui Electric Co., Ltd.