Technical library · Scope planning guide
How to scope a gas turbine generator replacement
A replacement inquiry should identify the generator, its driving train and the contracted stages: disconnection, removal, lifting, loading, transport, installation and interface closeout. Providing nameplates, photographs and dimensions from the start helps define resources, responsibilities and deliverables before scheduling the intervention.
TEMISA Power Gen · Published
Which machine is being replaced?
Distinguish the electrical generator from its driving gas turbine and gearbox, where fitted. Ask the proposal to identify which machine will be removed and which equipment remains on site. Existing and replacement nameplates help compare electrical and mechanical data; a shared brand or power rating does not prove direct interchangeability.
What access and disconnections must be documented?
Document power, communications, instrumentation, heaters, lubrication, guards and enclosure components that may need intervention. Provide photographs and dimensions of access points, obstructions, base and exit route. The removal method is determined from the actual equipment and site conditions.
Who supplies lifting and transport resources?
Clarify who supplies the crane, rigging, personnel, transport platform and unloading resources. Provide verified dimensions and mass, origin, destination, supports and receiving conditions. Define records for each transport stage; crane capacity is not equipment mass.
What must be checked before installation?
Review support geometry, anchors, shaft height and train interfaces. Distinguish positioning, pre-alignment, final alignment and coupling installation. Define the reinstatement of power, excitation, instrumentation and lubrication together with checks and responsibilities.
Which records should be delivered at closeout?
Request activity records, photographs and installation checks. For testing, final alignment, coupling or commissioning, define the procedures, acceptance criteria and records that will document each activity.
If your plant operates industrial cogeneration
A gas turbine can drive a generator and form part of a cogeneration or CHP system when useful heat is also recovered for steam, hot water or a process. If your plant operates this way, document electrical and thermal constraints, heat recovery and the people responsible for coordinating shutdown and restart. A gas turbine alone does not prove cogeneration. This is general planning guidance and does not attribute that application to the documented case.
FAQ
Frequently asked questions
Questions we often receive. Can't find yours? Email us at ventas@temisapowergen.mx.
How long does a generator replacement take?
The schedule is established after reviewing access, mass, handling resources, replacement availability, and electrical and mechanical interfaces. It must reflect verified machine and plant conditions.
Which risks should a replacement scope address?
The extraction route, obstructions, lifting equipment capacity and configuration, support arrangements, and electrical and mechanical interfaces. The method must be based on verified machine and site information.
Should commissioning be included in the quotation?
It must be stated explicitly. Removal, mechanical installation, alignment, coupling and commissioning are separate stages with defined closeout records.
A scope guide and an access note answer different questions
This guide organizes the complete replacement contract. The Stamford note addresses a more focused question: how to remove and reinstall a generator when its enclosure constrains the handling operation.
Plan the intervention
From your equipment to a defined scope
Share the information you have. We will review conditions to define resources, responsibilities and project stages.
- Nameplates for the existing generator, replacement and prime mover.
- Photographs of equipment, connections, base, enclosure and access.
- Verified dimensions and mass, plus support and handling documentation.
- Extraction and receiving routes; transport origin and destination.
- Project location, entry restrictions and planned intervention window.
- Required stages and resources supplied by each party.