Combined Medium-Voltage Terminal Box as Part of a Generator Unit

The Customer Placed Emphasis On:

• full functional continuity with the generator MTB,
• a clearly defined turnkey scope of supply,
• a unified standard of components and wiring,
• easy on-site assembly and installation.

The scope of the assignment particularly included:

• engineering design of the structure,
• manufacturing of load-bearing structures including surface treatment,
• cable connection contacts designed using bent copper busbars,
• complete supply of installation material (bolts, coatings, minor components),
• a terminal box – either custom-made or standardized – equipped with Siemens / OEZ components,
• wiring of interconnections between the GCB and the terminal box,
• integration of surge arresters – following technical evaluation, relocation from the MTB directly onto the GCB structure,
• bolted grounding points for a portable grounding set,
• a grounding busbar included in the scope of supply,
• design and delivery of a protective cage (fencing) for the GCB in galvanized finish.

IVEP Solution

IVEP provided:

• complete engineering design of the equipment and its integration into the generator assembly,
• manufacturing of the combined terminal box MTB + N, including structural components,
• supply and wiring of the terminal box in a unified standard consistent with other MTBs,
• design of connection busbars and grounding points with a focus on operator safety,
• coordination of changes during the project (relocation of surge arresters to the GCB) without impact on documentation or delivery schedule,
• design and delivery of the GCB protective cage as a separate yet functionally integrated unit.

The entire solution was designed to be clear in layout, safe, and easy to install at the installation site.

Result

• Fully functional and compact MV solution integrated with generator TG3
• Clearly defined interfaces between the MTB, GCB, and grounding system
• Simplified installation and future maintenance
• Flexible response to changes in requirements during the project
• A unified technical standard across the entire system