Project Overview

Project Industry: Electric Vehicle Charging Infrastructure
Project Location: China (Guangdong)

Power Capacity: 1250kVA Compact Substation

Voltage Rating: 10kV / 0.4kV

Charging System: Six 160kW Dual-Gun DC Fast Chargers (12 Charging Connectors)

Application: Power Supply for DC Fast Charging Stations

Service Scope: Custom Industrial Transformer Design, Manufacturing, Factory Testing & Technical Support

Solution: Customized Compact Substation with MV Switchgear, Oil-Immersed Transformer and LV Distribution Cabinet

To support a new EV charging station, the customer required a reliable and compact power distribution solution capable of supplying six 160kW dual-gun DC fast chargers.

Meibian Electric designed and manufactured a customized 1250kVA compact substation integrating medium-voltage switchgear, an oil-immersed distribution transformer and a low-voltage distribution cabinet into one factory-assembled unit. The system was fully tested before shipment, enabling fast installation and minimizing on-site construction work.

The compact substation delivers stable power distribution for 12 charging connectors, ensuring reliable operation, high energy efficiency and low maintenance costs in outdoor environments.

Customer Challenges

• Supplying stable power for six 160kW dual-gun DC fast chargers.
• Reducing installation space and civil construction costs.
• Shortening project delivery and commissioning time.
• Ensuring reliable outdoor operation under harsh environmental conditions.
• Providing a safe, low-maintenance and energy-efficient power distribution solution.

Our Solutions

China Production Base (1250kVA European Transformer)

Quantity: 1 Unit | Rated Power: 1250KVA | Certification: GB/T 17467-2020, IEC62271

• Integrated medium-voltage switchgear, oil-immersed transformer and low-voltage distribution cabinet in one compact enclosure.
• Designed to supply power for six 160kW dual-gun DC fast chargers.
• Factory-assembled design reduces installation time and on-site construction costs.
• High-efficiency transformer with low energy loss and stable power output.
• IP54 outdoor enclosure suitable for long-term operation in harsh environments.
• Complete electrical protection system ensures safe and reliable operation.

Technical Specifications

Every EV charging station project is customized according to the customer's electrical drawings and local utility requirements. Before engineering begins, our technical team confirms the following key parameters to ensure the compact substation matches the charging system and grid conditions.

Design Inputs

• Single charger power rating (e.g. 160kW DC fast charger)
• Total number of chargers (e.g. six dual-gun DC chargers)
• Transformer capacity (1250kVA in this project)
• MV/LV voltage level (e.g. 10kV / 0.4kV)
• Number of low-voltage outgoing feeders based on the charging layout
• Whether medium-voltage metering is required by the local utility
• Protection and metering configuration
• Cable entry direction (bottom or side entry)
• Local standards and environmental conditions

Power Quality Solution

To ensure stable operation of high-power DC fast chargers, this project is equipped with an SVG (Static Var Generator) instead of a conventional capacitor compensation cabinet.

Compared with traditional capacitor banks, the SVG provides:

• Fast dynamic reactive power compensation
• Improved power factor under changing loads
• Harmonic mitigation for high-power charging equipment
• Better voltage stability
• Compliance with utility power quality requirements

Although the initial investment is higher than conventional capacitor compensation, the SVG offers superior performance, longer service life and lower operating costs for EV charging applications.

Engineering Support

Our engineers review the customer's single-line diagram (SLD) and charging station layout before production. The compact substation is then customized according to the required transformer capacity, feeder configuration, protection scheme, metering requirements and power quality solution, ensuring seamless integration with the local power grid.

Customer Feedback

自建多个新能源充电站以来，最满意的电力配套设备就是该厂家箱变。设备各项参数达标，散热好、损耗低、耐候性强，户外场站长期使用故障率极低，有效保障充电桩稳定高效运转。企业诚信务实，沟通顺畅、配合度高，产品性价比与综合实力远超同行，长期合作无忧！--广东广州刘总

Our Advantages

As a professional industrial transformer manufacturer, we provide one-stop power solution for global manufacturing industries. Support voltage customization, multiple international certifications, strict quality inspection and localized after-sales service. We focus on high-efficiency, safe and durable industrial transformers to help customers reduce costs and increase productivity.