Grid-eXpand® Mobile solutions provide grid operators and utilities the rapid deployment and reliability they need to maintain power continuity during emergencies, maintenance, and peak demand - enabling fast energization when it matters most. It delivers pre-engineered, factory-tested, plug-and-play substations on trailers/skids. Easily transported and installed, they minimize environmental disturbance while allowing utilities to respond quickly to evolving grid needs. It offers multiple configurations to meet diverse requirements, covering voltage levels up to 420 kV and power ratings up to 500 MVA.
Key Benefits
Compact footprint
Cost efficient
Digital-twin enabled
Ready to use
Resillient to harsh weathers
Enhanced safety
Flexible and scalable
Cyber security
In a world where natural and human-made disruptions are increasingly common, the grid must be ready to respond with speed and reliability. Mobile substations are not just a technical solution - they are essential to building a more flexible and resilientenergy network. By combining the deep expertise of our Center of Competence and the close collaboration with our customers, we have a unique opportunity to truly make a difference
Grid-eXpand® Mobile Portfolio
- Mobile Compact Substations
- Mobile Modular Substations
- EcoMobile Substations
Portable, self-sustained equipment and transformer on a single trailer or skid
Grid-eXpand® Mobile Compact Substations (MCS) are the perfect solution when fast deployment and energization is required during grid expansions, maintenance or when back-up or emergency power is needed.
The Mobile Compact Substation (MCS) is defined by its exceptional compactness, integrating all high-voltage equipment and the power transformer onto a single semi-trailer or skid for compliant, fully assembled module transport. Serving as a containerized HV layout for fast installation and high mobility, MV and LV equipment can be combined on the same platform or placed on a separate mobile unit, allowing flexible configurations for needs.
Designs can be configured to comply with national grid codes and standards depending on customer requirements, including IEC or ANSI.
Download and Links
Frequently Asked Questions
Installation time depends mainly on the voltage level, power rating, and site-specific conditions.
As a reference, a 40 MVA – 150/30 kV mobile substation typically requires a few days for installation and commissioning.
Larger systems, such as a 500 MVA – 420/110 kV mobile substation, may require a few weeks, depending on site preparation, civil works, and grid connection conditions.
The modular design and factory-tested configuration significantly reduce on-site installation time compared to conventional substations.
Grid‑eXpand® Mobile substations are designed with redundancy to ensure high availability:
In case of failure of the primary auxiliary supply (via the auxiliary transformer), a battery system provides immediate backup to critical systems such as Protection & Control, Telecommunications, and SCADA.
As an additional level of emergency backup, an optional diesel generator can be included, comparable to those used in standard permanent substations, ensuring sustained auxiliary power during extended outages.
Related Offering
News
