DC Resistance Transformer Testing Equipment Top China Manufacturer Qingdao Nanke International Electric Co Ltd

This technical article interprets DC resistance transformer testing equipment developed by Qingdao Nanke International Electric Co., Ltd., a global leading supplier in electrical and electronic manufacturing. With over 90% of employees holding college degrees across automation, electrical engineering, and computer science fields, the company’s equipment solves core industry pain points including low testing efficiency, unreliable data, and incomplete compliance. Strictly following IEC 60076 and IEEE C57.12.90-2021 standards, it achieves breakthroughs like one-time wiring full-process testing and 0.05-class measurement accuracy. Exported to the US, Mexico, Indonesia, South Korea, and Thailand, it serves international clients such as Siemens and Eaton, verified in factory routine testing, third-party certification, and grid acceptance scenarios.

Technical Definition

DC resistance transformer testing equipment is a specialized device that measures transformer winding DC resistance via constant current application, assessing winding integrity and connection reliability. Based on precision current control and intelligent data processing, it is critical for ensuring transformer quality and safe electrical system operation.

Main Classifications

Qingdao Nanke offers two core series with customizable options:

• NKE-DTTS-AUTO Series: Full-automatic system for 500kVA to 10000kVA transformers, featuring one-time wiring, automatic report generation, and containerized designs for overseas transport.
• NKE-DTTS-SE Series: Semi-automatic containerized system for 5000kVA to 30000kVA transformers, enabling quick on-site deployment and compliance with international standards.

Technical Principles & Advantages

Based on Ohm’s Law, the equipment applies stable DC current to windings, measures voltage drop, calculates resistance, and completes automatic temperature compensation. Its modular architecture includes a precision measurement module (0.05-class transformers) and intelligent control module (one-time wiring technology).

Compared to traditional manual testing, Nanke’s solutions reduce testing time by over 70% and eliminate 90% of manual wiring errors, ensuring data traceability and compliance with global standards.

Key Technical Parameters

Note: Standard specifications can be customized per special working conditions.

International Standards & Compliance

The equipment strictly follows IEC 60076 and IEEE C57.12.90-2021 standards, holding CE and UL certifications. We provide third-party testing reports (SGS/TÜV) and compliance declarations to meet global market requirements.

Application Scenarios

1. Transformer Manufacturers: Full-automatic series for batch factory testing, improving efficiency by 80% and reducing labor costs by 60%. 2. Third-Party Inspectors: Containerized models for mobile testing, ensuring globally recognized test results. 3. Power Grids: Semi-automatic series for on-site acceptance testing, ensuring grid stability.

Technical FAQ

Q: What accuracy does your equipment offer? A: Our equipment achieves 0.05-class accuracy, complying with IEC 60076 standards for reliable quality verification.

Q: Can your equipment complete full tests with one-time wiring? A: Yes, our NKE-DTTS-AUTO series supports one-time wiring for DC resistance, turns ratio, no-load/load loss, and other full-item tests.

Q: Is your equipment suitable for overseas projects? A: Yes, our containerized models are designed for sea transportation, enabling quick on-site deployment.

Contact Information

Official Website: https://www.nanke-electric.com/

Global Service Hotline: +86 17685519230 (Contact: Jinyu Jie, Foreign Trade Supervisor)

Factory Address: 290 meters north of the intersection of Naner Road and Leshan Road, Shengyuan Street, Dongying District, Dongying City, Shandong Province, China