Low-Power-Consumption Wide-Measurement-Range Transformer Turns Ratio Tester-High-Resolution Anti-Interference Portable User-Friendly Factory

• Customization: Available
• After-sales Service: Provided
• Warranty: One-Year
• Model NO.: NRB300
• Accuracy Grade: 1
• Display: Digital
• Control: Computer Control
• Weight: 6kg
• Ratio Measurement Range: 0.8—5000
• Ratio Measurement Accuracy: 0.1% (0.8—1000) 0.2% (1000—2000) 0.5% (2000—50
• Test Voltage: AC20V—230V
• Operating Temperature: -10℃—40℃
• Environment Humidity: 10%—85%
• Operating Power: AC230V ± 10%
• Transport Package: Wooden Box with Foam Inside
• Specification: 380×260×160mm
• Trademark: Refine On
• Origin: China
• HS Code: 903082000
• Production Capacity: 100 Set Per Week
• Package Size: 48.00cm * 38.00cm * 44.00cm
• Package Gross Weight: 18.000kg

Product Description

Product Description

PRODUCT FUNCTION

NRB300  Transformer Turns Ratio Tester

FUNCTION

Automatic variable ratio measurement function, without any parameters can be set to automatically complete the three - phase ratio, winding wiring and group label measurement, easy operation, one press is enough.
Automatically measured, three - phase continuous measurement, single - phase transformer ratio, and calculate the ratio error.
Measure Y / y, Y / d, D / y, D / d, ZN / y, ZN / d and other combinations of transformers.
Measure the high and low side of the winding wiring and group labels, especially for unknown group transformer measurement.
Perfect protection functions, with quantitative output overload protection and over - voltage protection.
When the excitation current is large, the output voltage can be reduced automatically to meet the low rated voltage and large excitation current transformer.
Automatic tracking measurement of the on - load taps position, no need to repeat the input parameters.
Small size, light weight, accurate measurement, fast test.
Store or print all the measurement results, the instrument built - in power - down memory and micro - printer can be long - term preservation of measurement data and ready to access and print.
With RS - 232 interface, you can communicate with the computer,enhanced data management functions.
No power down calendar, clock function.

Technical Parameters

Ratio Measurement Range	0.8—10000
Ratio Measurement Accuracy	- 0.1% (0.8—1000) - 0.2% (1000—2000) - 0.5% (2000—10000)
Test Voltage	AC20V—230V
Operating Temperature	-10℃—40℃
Environment Humidity	10%—85%
Volume	380×260×160mm
Weight	6Kg (not include test-line)
Operating Power	AC230V ± 10%

PRODUCT APPLICATION

Company Profile

ABOUT US

Refine On (Hebei) Electric Power Technology Co., Ltd. is located in the Mancheng High-tech Development Zone, Baoding. It is fully committed to the high-tech field of power system automation, specializing in the research and development of a series of products such as power system marketing measurement, operation and maintenance high-voltage testing, distribution network testing, power consumption inspection, and tools and meters. It is a technology-oriented enterprise integrating R&D, production, sales and service. The company provides instruments, meters and testing equipment related to power generation, transmission, transformation, distribution and sales. Provide sales of complete sets of instruments and equipment required for installation (repair, testing) of Grade one, Grade Two, Grade Three and Grade Four.

The company is equipped with various production, testing and inspection facilities, has a sound management system, and strictly adheres to the GB/T19001-2016 quality management system standard for production and operation. A number of high-tech instruments and equipment that meet the on-site requirements have been developed. At present, the products have been widely applied in multiple fields such as power, railway, mining, petroleum and chemical engineering.

The company has obtained the Quality management System certification certificate, 2 invention patents, 10 utility model patents and 20 software Copyrights. And it has established long-term and close cooperative relations with units such as Beijing Institute of Metrology, Beijing Electric Power Research Institute, and Hebei Institute of Metrology.

Our main products include insulating oil tester series, insulating resistance tester, power quality analyzer, circuit breaker, relay protection tester, high-voltage generator, high-voltage capacitor, test transformer, transformer test series, etc.

Certifications

Packaging & Shipping

FAQ

FAQ

1. Insulating Oil Tester Series
1.1 What is the main function of the Insulating Oil Dielectric Strength Tester (80kv/100kv)?
Tests insulating oil's dielectric strength to detect impurities, moisture, or aging, ensuring safe operation of transformers and circuit breakers.

1.2 How often should the Insulating Oil Dielectric Strength Tester be calibrated?
At least once a year; shorten intervals for frequent use, harsh environments, or post-maintenance.

1.3 What is the difference between the Closed Cup Flash Point Automatic Tester and the Open Cup Flash Point Automatic Tester?
• Closed Cup: Tests in sealed containers; for low-flash oils (e.g., diesel) and sealed power equipment.

• Open Cup: Tests in open containers; for high-flash oils (e.g., insulating oil) and air-exposed scenarios.

2. Transformer Test Series
2.1 What can the Transformer Capacity Tester detect?
Detects transformer's actual capacity, no-load/load loss, no-load current, and impedance voltage; judges compliance and faults.

2.2 How to use the Transformer Tap Changer Tester?
1. Connect test lines to tap changer terminals per manual.

2. Power on, select test mode (e.g., resistance test).

3. View results; disconnect and power off after. (Note: De-energize and ground transformer first.)

2.3 What is the purpose of the Transformer Winding Deformation Tester?
Detects winding deformation (axial displacement, short circuits) from short-circuits or vibration; enables early maintenance to avoid accidents.

FAQ

3. Circuit Breaker Test Instruments
3.1 What are the differences between the Single-Chip Microcomputer and Industrial Computer Circuit Breaker Characteristic Testers?
• Industrial Computer: Stronger data processing, more tests (e.g., dynamic resistance), touch interface, and computer data communication.
• Single-Chip: Simple structure, low cost; for basic characteristic tests.
3.2 How to judge whether the Circuit Breaker Characteristic Tester is working normally?
1. Check power and indicator lights.
2. Run self-test; test a standard circuit breaker.
3. Confirm results are within allowable error. Stop use if self-test fails or errors are large.
4. Cable Fault Test Instruments
4.1 What types of cable faults can the Multiple Pulse Cable Fault Tester detect?
Detects low-resistance (short circuits), high-resistance (leakage), and open-circuit faults; locates faults via pulse reflection.
4.2 How to improve the accuracy of the Cable Fault Location Tester?
• Ensure correct, firm test line connections.
• Select proper test mode/parameters for fault type.
• Eliminate environmental interference; keep site clean/dry.
• Calibrate regularly.
• Test multiple times for complex faults; analyze results comprehensively.
5. Insulation Resistance Tester
5.1 What is the application scope of the High-Voltage Insulation Resistance Tester?
Tests insulation of high-voltage equipment (transformers, generators, cables, etc.); checks for moisture, dirt, or aging to support commissioning and maintenance.
5.2 How to (complete based on full content; core steps?

Store in dry environment, avoid impact; clean terminals before use; calibrate regularly to maintain accuracy.)