1. Project Overview

This project is customized by Nanke Electric for Wuxi Yineng Power, and it belongs to the second part of its eighth intelligent test station in 2025. It is an offline large-capacity three-phase transformer intelligent testing system, capable of completing all factory acceptance tests for oil-immersed and dry-type transformers up to 25 MVA. This system is suitable for offline large-capacity testing scenarios, meeting the factory quality control requirements for large-capacity transformers in fields such as rail transit, power transmission and distribution, and new energy, thereby helping customers achieve intelligent and standardized testing.

2. Maximum Testing Capacity

Offline Large-Capacity Test Area for Oil-Immersed/Dry-Type Transformers: Transformer Capacity: 25,000 kVA; Primary Voltage: 35.00 kV; Secondary Voltage: 0.4–10.00 kV; Short-Circuit Impedance: 6.00%–14.00%;

Transformer Capacity: 16,000 kVA; Primary Voltage: 20.00 kV; Secondary Voltage: 2 kV and below; Short-Circuit Impedance: 6.00%–10.00%;

Transformer Capacity: 6,300 kVA; Primary Voltage: 10.00 kV; Secondary Voltage: 2 kV and below; Short-Circuit Impedance: 10% and below.

3. Test Items

1. Insulation Resistance Test;

2. DC Resistance Test;

3. Turns Ratio and Connection Group Test;

4. No-Load Test: including no-load loss, power factor measurement, and no-load current percentage test;

5. Load Test: including load loss (with automatic conversion to 75°C, 120°C, and 145°C values) and short-circuit impedance percentage;

6. Induced Voltage Withstand Test;

7. Power Frequency Withstand Test;

8. Temperature Rise Test;

9. Partial Discharge Test;

10. Sound Level Measurement.

4. Project Highlights

Full Coverage of Large Capacities: Supports full-specification testing for oil-immersed and dry-type transformers up to 25 MVA, compatible with multiple voltage levels up to 35 kV, meeting the needs of large-capacity testing.

One-Stop Comprehensive Testing: Covers 10 core test items, enabling complete factory acceptance testing in a single session without requiring separate equipment or scenario-based testing.

Intelligent and Efficient: Automatically converts load loss values at multiple temperature points, eliminating manual calculations, ensuring precise and compliant data, and significantly improving testing efficiency.

Adapted to Offline Scenarios: Specifically designed for offline large-capacity test areas, featuring a well-planned layout and convenient operation that aligns with on-site testing procedures.

Mature Delivery: Based on proven technical solutions, rapid customization and implementation, providing integrated services covering installation, commissioning, and training.

5. Commissioning Information

Client: Wuxi Yineng Power Equipment Co., Ltd.

Commissioning Date: March 2026

Commissioning Date: April 2026