Fully Automatic Transformer Intelligent Test System for Hebei Xuhui Electric Co., Ltd. (The 12th Set in 2025)

1. Project Overview

Customized by Nankee Electric for Hebei Xuhui Electric Co., Ltd., this project is its 12th Full-Automatic Transformer Intelligent Test System in 2025. Exclusively designed to match the customer's core products for power grid safety control and power quality management, it can fully cover the routine, type and special tests of power transformers, arc suppression coils and dry-type core series reactors of 35kV and below. It realizes intelligent detection, accurate data and standardized processes, and improves the quality control system of the customer's entire industrial chain for product R&D, production and testing.

2. Test Object Parameters and Maximum Test Capacity

(1) Power Transformer (Including Grounding Transformer)

Voltage class: 35kV and below (rated 38.5kV), including 35/20/10/6/0.8/0.69/0.4/0.23kV

Capacity: 35kV≤5000kVA, 20kV≤3000kVA, 10kV≤2500kVA; Grounding transformers are divided into those with/without low-voltage coils, the maximum capacity of low-voltage coils is 800kVA

Frequency: 50/60Hz, 100-200Hz for induction test

Short-circuit impedance voltage: 4%-12%

(2) Arc Suppression Coil

Voltage class: 10kV (10.5/3kV), 35kV (38.5/3kV)

Capacity: 10kV≤2000kVA, 35kV≤2200kVA

Gear/Current regulation: Tapped type with 9/14/19/25 gears (20%-110%); Capacity-regulated type with 16/32 gears (0%-110%); Phase-controlled type with stepless regulation (0%-110%)

Frequency: 50/60Hz, 100-200Hz for induction test

(3) Dry-Type Core Series Reactor

Voltage class: 10kV and below (10.5kV), including 10/6kV

Capacity: 10kV≤1200kvar; Reactance rate: 5%-12%

Frequency: 50/60Hz, 100-200Hz for induction test

3. Test Items (Power Transformer / Grounding Transformer)

(1) Winding DC resistance test

(2) Transformer ratio and vector group measurement (8 columns)

(3) Insulation resistance test

(4) Power frequency voltage withstand test

(5) No-load loss/current measurement, calculation of no-load current percentage, no-load harmonic measurement

(6) Load loss/short-circuit impedance measurement, standard temperature conversion (rated/maximum/minimum tap)

(7) Zero-sequence impedance measurement (rated/maximum/minimum tap)

(8) Induced voltage withstand test (in noise shielded room)

(9) Partial discharge test (in noise shielded room, live background ＜3PC)

(10) Noise test (in noise shielded room)

4. Project Highlights

(1) Full coverage of multiple products and specifications: Adapt to all types of transformers, arc suppression coils and reactors of 35kV and below, accurately matching the customer's testing needs for core products.

(2) Compatibility with all test types: Support routine/type/special tests and cover a variety of special tests to reduce costs and improve efficiency.

(3) Reliable guarantee for accurate detection: Noise shielded rooms are equipped for key tests with partial discharge background ＜3PC, effectively isolating interference and ensuring accurate and reliable detection data.

(4) Intelligent and efficient operation: Automatic parameter collection and temperature conversion, full-process intellectualization, greatly shortening the product detection cycle.

(5) Customized design for on-site application: Integrated layout of control room/equipment area/shielded room, perfectly matching the customer's existing production line for easy operation.

(6) Mature one-stop service: Mature technical solution with fast implementation; providing integrated services of design, installation and commissioning, training and operation maintenance to ensure stable commissioning throughout the process.

5. Commissioning Information

Client: Hebei Xuhui Electric Co., Ltd.

Commissioning Time: March 2026

Operation Time: April 2026