Substations for 100 kV, 110 kV, 380 kV and 400 kV
Technical execution, installation, testing and commissioning of substations for demanding grid and industrial projects.
ept Services supports utilities, grid operators, industrial companies, project developers and plant builders in delivering substations in the high-voltage and extra-high-voltage range.
Plan, install and commission substations reliably
The expansion and modernization of power grids place high demands on substations, switchgear, transformers and protection systems. New feeders, industrial connections, wind farms, storage systems, data centers and grid expansions require high-performance substations delivered safely, in compliance with standards and on schedule.
Practical support from a single source
ept Services delivers technical services for high-voltage and extra-high-voltage substations. This includes coordination with manufacturers, utilities and project stakeholders, installation of electrical equipment, routing and connection of cable systems, testing of protection devices and transformers, and commissioning of the installation.
From technical clarification to orderly commissioning
Whether it is a 100/110 kV substation bay, a 380/400 kV grid connection, an extension of existing switchgear or a new substation build: we combine practical installation experience with electrical engineering know-how, structured project execution and strong schedule discipline.
This creates a page that not only informs, but also makes room for strong project references and site imagery.
Our services for 100 kV and 400 kV substations
Technical clarification and project preparation
Clean technical clarification determines project success even before installation begins. ept Services supports coordination with switchgear manufacturers, transformer manufacturers, grid operators, utilities, planners and other project stakeholders.
- Technical clarification with manufacturers and project partners
- Coordination of interfaces between switchgear, transformer, cable system and protection technology
- Support in coordination with utilities and grid operators
- Review of installation and commissioning conditions
- Preparation for technical implementation on site
Installation of switchgear and high-voltage components
ept Services handles the installation of switchgear and components in the high-voltage and extra-high-voltage range. Depending on project scope, we support new builds, extensions, modernization or the replacement of individual substations.
- 100/110 kV substations
- 380/400 kV substations
- Extensions of existing switchgear
- Grid connections for industry and power generation
- Wind farm and offshore-related infrastructure
- Transformer bays and line bays
- Modernization and retrofit of existing installations
Transformers, cable systems and connection works
A substation bay operates reliably only when switchgear, transformers and cable systems are integrated correctly. ept Services installs and routes cable systems, connects them to equipment and supports work around transformers and high-voltage components.
- Installation and connection of cable systems
- Connection works on switchgear, transformers and equipment
- Mechanical support structures for high-voltage components
- Fabrication of transformer rails, cable support structures and custom fabrications
- Installation support for new and existing installations
- Support for container solutions and code-compliant special solutions
Protection testing and protection technology
Protection systems are a central component of safe high-voltage installations. ept Services performs protection testing on protection devices and systems, creates test sheets in coordination with the client and evaluates the results transparently.
- Testing of protection devices and protection systems
- Creation and coordination of test sheets
- Evaluation and documentation of test results
- Support with commissioning tests
- Review of protection concepts in high-voltage installations
- Support with troubleshooting and system analysis
Testing of cables, transformers, motors and generators
In addition to the switchgear itself, cable systems, transformers, motors and generators are critical to safe operation. ept Services performs common tests and diagnostics on this equipment.
- Cable testing and diagnostics
- Partial discharge measurement
- Tan delta measurement
- Transformer testing
- Winding resistance measurement
- Turns ratio measurement
- Oil analysis
- Sweep Frequency Response Analysis
- Testing of motors and generators
Network calculations, protection studies, grounding studies and commissioning
Reliable network calculations and protection studies are essential for high-voltage and extra-high-voltage substations. ept Services performs network calculations with Siemens SINCAL and supports protection studies, grounding studies, network analyses and the commissioning of substations, switchgear, transformers, cable systems and protection technology.
- Network calculation with Siemens SINCAL
- Load-flow and short-circuit calculations
- Protection studies including distance and differential protection
- Grounding studies, grounding design and on-site grounding measurements
- Network analyses and measurements in the customer network
- Functional tests on switchgear and protection systems
- Documentation of test results and optimization recommendations
100 kV, 110 kV, 380 kV and 400 kV: experience at relevant voltage levels
In the German market, the 100 kV class is often considered within the 110 kV network level. In 400 kV projects in Germany, the focus is often on 380 kV extra-high-voltage grids and the associated 400/420 kV equipment classes.
ept Services supports projects at these voltage levels with technical experience, installation expertise and testing services. This allows us to support both individual switchgear bays and more complex substation projects.
- 100/110 kV bays
- 380/400 kV substations
- Transformer bays
- Line bays
- Coupler bays
- Grid connection bays
- Wind farm substations
- Industrial and large-load connections
Who is this service for?
Our offer is aimed at companies and project managers who need to plan, build, expand, test or commission substations.
- Grid operators and utilities
- Transmission and distribution grid operators
- Industrial companies with their own high-voltage infrastructure
- Project developers in renewable energy
- Wind farm operators and offshore projects
- Plant builders and EPC contractors
- Switchgear and transformer manufacturers
- Operators of data centers and energy-intensive facilities
- Engineering firms and technical planners
Why choose ept Services for substations?
Experience in electrical power systems
ept Services specializes in electrical power supply, switchgear, transformers, protection technology, network calculations and high-voltage installations.
Installation and testing from one source
We combine the installation of switchgear, cable systems and components with protection testing, cable diagnostics, transformer testing and commissioning.
Technical clarification and special solutions
We support the project already during technical coordination and fabricate project-specific solutions such as transformer rails, cable support structures or container solutions.
How a project with ept Services works
1. Inquiry and initial technical assessment
You describe your project, voltage level, system scope and the support required. We review the requirements and clarify which services make sense.
2. Technical clarification and coordination
We coordinate technical details with you, manufacturers, grid operators and other project partners, reviewing switchgear, transformers, cable systems, protection technology and interfaces.
3. Preparation and installation
Our team prepares the execution and carries out installation work on switchgear, cable systems, transformer connections and additional equipment.
4. Testing and diagnostics
Depending on the project scope, we carry out protection tests, cable tests, transformer tests, grounding measurements and additional diagnostics.
5. Commissioning and documentation
We support commissioning, document test results and assist with the technical handover into operation.
Fields of application
From individual 110 kV switchgear bays and extensions of existing substations to technical services around 380/400 kV projects, we provide practical support for planning, installation, testing and commissioning.
Substations for grid connection, the energy transition and industry
Demand for high-performance substations is rising. Renewable energy, wind farms, storage, large industrial loads, data centers and grid expansion projects require safe high-voltage and extra-high-voltage infrastructure. Substations form the interface between lines, transformers, switchgear, protection technology and grid operation.
Frequently asked questions about substations
Are you planning a substation bay or a high-voltage installation?
Talk to ept Services about your project. We support technical clarification, installation, testing, network calculations and commissioning of substations in the 100/110 kV and 380/400 kV range.
Contact us for an initial technical assessment.