11kV, 33kV & 35kV Medium Voltage Substation | IEC Compact & Prefabricated Solutions

02-02 2026 | By:

Reliable Medium Voltage Substations for Global Power Distribution

Medium voltage substations are a critical link between power generation and end-users.
Among them, 11kV, 33kV, and 35kV medium voltage substations are the most widely adopted voltage levels for industrial, commercial, and utility power distribution systems.

Our IEC-compliant compact and prefabricated substations are engineered to deliver safe, efficient, and long-term power solutions for projects worldwide. Designed for fast installation, minimal footprint, and high reliability, they are ideal for both indoor and outdoor applications.

Understanding 11kV, 33kV and 35kV Substations

Different regions use different voltage standards, which often leads to naming confusion:

• 11kV Substation
  Commonly used for local distribution, industrial plants, and commercial buildings.

• 33kV Substation
  Widely adopted in IEC markets such as Europe, the Middle East, Africa, and Southeast Asia.

• 35kV Substation
  Frequently used in China, CIS countries, and parts of Asia, serving similar roles to 33kV systems.

Although the voltage levels differ, the design principles, safety requirements, and functional structures are largely the same when built to IEC standards.

Compact & Prefabricated Substation Solutions

To meet modern project requirements, we offer multiple medium voltage substation configurations:

• Compact Substation (Package Substation)
  Transformer, MV switchgear, and LV distribution integrated into a single enclosure.

• Prefabricated Substation
  Factory-assembled, fully tested, and ready for quick on-site installation.

• Containerized / E-House Substation
  Ideal for large industrial, mining, and renewable energy projects.

All solutions are designed to reduce civil work, shorten installation time, and improve operational safety.

Typical Technical Specifications

Below is a general reference for our 11kV / 33kV / 35kV IEC substations. Customization is available.

Key Application Scenarios

Our medium voltage substations are widely used in:

• Industrial factories and production plants

• Commercial buildings and business parks

• Renewable energy projects (solar & wind)

• Mining, oil & gas facilities

• Infrastructure and utility distribution networks

• Data centers and logistics hubs

Each solution is engineered according to load demand, environmental conditions, and local grid requirements.

IEC Standards & International Certifications

All substations are designed and manufactured in compliance with international standards:

• IEC 62271 – High-voltage switchgear and controlgear

• IEC 60076 – Power transformers

• ISO 9001 – Quality management system

• ISO 14001 – Environmental management system

• CE Certification

• Type test and routine test reports available

Third-party inspection and factory acceptance tests (FAT) are supported.

Fast Delivery & Project Efficiency

We understand that project timelines matter. Typical lead times are:

• Standard configurations: 4–6 weeks

• Customized substations: 6–8 weeks

• Large or complex projects: 8–10 weeks

Factory prefabrication ensures consistent quality and reduced on-site installation time.

Compact Sub Stations (CSS)

3-Year Warranty & Long-Term Support

To protect your investment, all substations are supplied with:

• 3-year warranty covering transformer, switchgear, enclosure, and accessories

• Complete technical documentation

• Installation and commissioning guidance

• Online technical support and spare parts availability

Our goal is long-term, stable operation throughout the entire equipment lifecycle.

Why Choose Our IEC Medium Voltage Substations?

• Proven IEC-compliant design for global markets

• Compact, prefabricated, and package substation options

• Flexible voltage levels: 11kV / 33kV / 35kV

• Strict quality control and full factory testing

• Competitive pricing with reliable delivery

• 3-year warranty for peace of mind

Request a Quotation Today

Looking for a reliable 11kV, 33kV or 35kV medium voltage substation?
Contact us today to receive technical drawings, specifications, and a competitive quotation.
Our engineering team will help you select the most suitable IEC compact or prefabricated substation solution for your project.

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