Generator rotor removal and replacement
With a generator rotor removal and replacement from GE, you can swap rotors that need repairs for refurbished, off-the-shelf rotors—an exchange we can perform in less than 10 days.
With GE’s generator-rotor exchange, you’ll see removal and replacement in only 7 – 10 days, which is up to 30 days faster than an in-shop rotor rewind. On average, each day of reduced downtime translates to a savings* of $30,000 to $130,000, depending on the time of year the outage is performed.
*Average savings based on 100 to 175 MW units
Save time and money
Up to 30 days faster
Fully tested on delivery
Peace of mind
We know your generator equipment
120+ exchange rotors
delivered to customers globally
> 2 million
You can order a rotor exchange as far in advance as you need to, substantially reducing the risk of schedule extensions and execution challenges due to late rotor parts, winding delays, or test failures that are common with an on-site generator. Your generator's new replacement rotor will arrive:
GE leverages our records and knowledge of each generator to create modeling tools that enable us to assess the risk level.
Although the exact process and data used is considered proprietary to GE, you can certainly contact your local sales account manager to continue that discussion.
Some common signs include:
These are all issues that can be determined while the rotor is running. More obvious issues are a grounded field or other condition that would trip the unit. Monitoring the condition of the rotor through products like GE’s Generator Health Monitoring will allow tracking and trending of issues.
GE will assess the exchange rotor against your unit’s current configuration and determine if other replacement parts or modifications are needed. Some units won’t require modification to accept an exchange rotor.
Common modifications include:
Cycle time for a winding repair will vary depending on the work required.
A full field rewind will take about 30 days, depending on the model type and scope of work. But some repairs can be performed in as little as 1-2 weeks.
Yes we can!
The GE team is very experienced in performing the interchangeable study required to help ensure an exchange rotor will fit. As the unit OEM, we have the original unit records, along with repair records and outage reports.
Additional information from the customer may be required to augment the information we have available.
We carry many models in our exchange program but availability varies with each outage season.
Common models like 7FH2, 324, 7A6, 330H, 7FH2-B and 9A5 are certainly within our program.
Did you know that GE is the OEM for thousands of generators? That includes many sub-models that most other vendors don’t have experience servicing, so we can work with you to make sure your new rotor is interchangeable with your old one. To date, we have performed more than 120 rotor removals and replacements for customers all over the world—including 30 just in the last two years.
Available for the following models: 7FH2, 7FH2B, 7A6, 324, 7H2, 330H, BDAX 7-290ERJT, TRLI 115-36, TRLI 115-36, TRLI 115-52, 9A
GE’s Exchange Rotor Program has been running for more than 20 years. How does it work? You can exchange generator fields that need maintenance or repairs for refurbished, off-the-shelf, pre-wound, and tested fields.
There are a number of things to consider when planning your outage, from the age and future operation mode of your generator to the best timing for an outage for your plant and customers. GE can perform a risk assessment to determine the condition of your rotors, identify the ones most at risk and the type of rotor, and any spare generator rotor parts you might need.
High-power density replacement generators can be tailored to meet your needs, with lowered plant impact, and enhanced reliability.Learn more
If a rotor exchange isn’t for you, we also offer OEM in-shop generator rotor rewinds that include all available upgrades that use the latest F-Class insulation materials for the highest quality rotor rewind.Learn more
GE offers stator rewinds for any make of generator to help increase reliability and availability.Learn more