High-Sensitivity Comprehensive Variable-Frequency Instrument Transformer Comprehensive Characteristic Tester - Precise-Detection Real-Time Monitoring Compact Lo

• Customization: Available
• After-sales Service: Provided
• Warranty: One-Year
• Model NO.: NRHG902
• Accuracy Grade: 1
• Load Way: Electronic Load
• Display: Digital
• Control: Computer Control
• Weight: <9kg
• Power Source: AC220V±10%,50Hz
• Usage: Class P/Tp CT & Vt
• Output: 0~180vrms 12arms 36A(Peak Value)
• Voltage Measurement Accuracy: ±0.2%
• CT Ratio-Range: 1-40000
• CT Ratio-Accuracy: ±0.2%
• PT Ratio-Range: 1-40000
• PT Ratio-Accuracy: ±0.2%
• Phase-Range: ±5min
• Phase-Accuracy: 0.5min
• DC Resistance-Range: 0-300ω
• DC Resistance-Accuracy: 2%±2MΩ
• Burden-Range: 0-300va
• Burden-Accuracy: 2%±0.2va
• Operating Temperature: -10c -50c
• Humidity: ≤90%
• Transport Package: Wooden Box with Foam Inside
• Specification: 340mm x220mmx330mm
• Trademark: Refine On
• Origin: China
• HS Code: 903082000
• Production Capacity: 100 Set Per Week
• Package Size: 60.00cm * 50.00cm * 40.00cm
• Package Gross Weight: 19.000kg

Product Description

Product Description

NRHG902    Variable-Frequency Transformer Comprehensive Characteristic Tester
CT/PT Analyzer is new product created after widely adopt customers' advices and deep theoretical study. The adoption of high-performance DSP and ARM, advanced manufacturing technology ensure a stable and reliable product performance, full-featured, high degree of automation, high efficiency, in the domestic leading level, they are the professional testing equipments for transformer check in power industry.

Characteristics

Full-featured, not only satisfy the test requirements of various CTs (include TP class), such as the excitation characteristics (i.e., volt-ampere characteristics), ratio, polarity, secondary winding resistance, secondary burden, ratio error and phase displacement, but can also be used for the tests of various PTs, including excitation characteristics of the electromagnetic unit, ratio, polarity, secondary winding resistance, ratio error and phase displacement.

Automatically give CT, VT parameters, including knee point voltage / current, 10% error curve, the accuracy limit factor (ALF), instrument security factor (FS), the second time constant (Ts), remanence coefficient (Kr), saturated and unsaturated inductance etc.

Test meet IEC60044-1,IEC60044-2,IEC60044-6 ,C57.13,IEC61869-2,IEC61869-3 all kinds of transformer standards, and in accordance with the transformer types and levels of automatic choose which standard test.

 Based on advanced principle of low-frequency test method that can meet the CT test on knee voltage up to 30KV.

Friendly interface beautiful, all Chinese graphic interface

The instrument can store 2000 groups of test data that won't be lost when power off. After test ended, the data can be coped to PC by USB disk for analysis and being transformed into WORD report.

Test is simple and convenient, one-click can complete tests of CT secondary resistance, excitation, ratio and olarity.

Easy to carry, because the weight is less than 9Kg.

Technical Parameters

		**** CT/PT Analyzer
Usage		Class P/TP CT & VT
Output		0~180Vrms,12Arms,36A(peak value)
Voltage measurement accuracy		±0.2%
CT Ratio	Range	1~40000
	accuracy	±0.2%
PT Ratio	Range	1~40000
	accuracy	±0.2%
Phase	Range	±5min
	accuracy	0.5min
DC resistance	Range	0~300Ω
	accuracy	2%±2mΩ
Burden	Range	0~300VA
	accuracy	2%±0.2VA
Power supply		AC220V±10%,50Hz
Environmental Conditions		Operating temperature :-10οC~50οC,Humidity :≤90%
Weight and Dimensions		Dimensions:340mm x220mmx330mm ,Weight<9kg
Aluminum alloy box dimensions		430mm x270mm x500mm

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.

Refine On (Hebei) is committed to providing high-quality products and technical services to users and partners in the power system with its exquisite technology, excellent quality and perfect service.

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.)