-Tuesday, January 29, 2019
As discussed in other articles on this site, care and maintenance of the primary disconnect (bottle) assembly in your GE Magne-Blast switchgear is a critical element that ensures proper functioning for years to come. Performing this critical maintenance can be tricky to do in a cost-effective manner if you are not intimately familiar with the equipment. Fortunately, we specialize in this area.
The Two Routes for GE Magne-Blast Maintenance
Remove and Rebuild
The first maintenance option is to remove the bottles from the Magne-Blast gear—either one breaker at a time or in mass—and then have them rebuilt in a proper fixture (to ensure proper alignment) using modern materials that ensure proper functioning for years, if not decades, to come. Performing maintenance in this manner can become time consuming from both a labor and an outage standpoint since each breaker will be taken out of service and will remain that way for at least a week or more depending on labor and outage schedules.
Swap Them Out
The second option is to purchase bottle assemblies that are already rebuilt and tested and have them swapped with existing equipment in one outage. The cost savings in downtime and mobilization costs for labor are obvious. However, you will need a supplier like NPE with both the experience and the inventory necessary to ensure that the replacement bottles you acquire match the existing ones, making them interchangeable without modifications in the field. GE has published very little comprehensive information on this subject. The attached diagram is often thought to be an all-inclusive guide, but our hands-on experience has shown that there are many more styles and factors that can affect interchangeability.
Getting the right information to your switchgear dealer is fairly simple, but it does require an outage. You will need to remove the inspection covers and get detailed, well-lit photos of the copper details at the top of both the line and the load side bottles, as well as photos of the bottom side by the shutter. Also, you will need to document the model number and the frame size of the breaker that will be installed into the cell. The feeder breakers are often the same configuration, but care will have to be taken with the main and ties breakers and document them separately.
Once the proper bottles have been identified, rebuilt, and swapped out, the existing bottles can be rebuilt and kept on hand for future spares or, if they are in rebuildable condition, they can be returned for credit as cores.
Have an Expert Handle Magne-Blast Bottle Repotting
If it’s time to maintain or replace your Magne-Blast Switchgear primary disconnects, NPE can help. Learn more about how NPE’s bottle repotting program can be just what you need or just contact us today to talk to one of our experts.