Power Plant 80T Gantry Crane Retrofit and Runway Extension

A 500MW power plant in Central Massachusetts rarely used their rooftop 80-ton capacity crane for critical lifts during preventative maintenance outages. The crude two-speed, across the line controls associated with both the traverse and hoisting motions made the movements abrupt and exact placement of load nearly impossible. In addition, this crane could not travel out far enough from the building to effectively load components on trailers. This was completely unsuitable for dismantling and assembling their turbines and generators. PES proposed a design-build solution, which involved removing the entire hoist and trolley assembly, commissioning a new custom-built assembly to replace it and installing it in its place as well as removing all of the bridge motion motors and having them rewound to be inverter duty rated. All of the old control panels were removed, new VFD control systems designed, fabricated and installed, then integrated with the new equipment. A second phase to the upgrade involved extending the portion of the runway off of the end of the building to improve hook approach. After this upgrade was completed, a full load test was performed to ensure optimal performance and set up of the new VFD controllers. The result is a gantry crane that has smooth, accurate control in all motions that they now utilize for all of their equipment service and maintenance.

Testimonials

What People Say About Us

“Since we started working with Progressive Electrical Services in 2005 we have not considered calling another contractor for our electrical service’s needs. Chris and his team are responsive, knowledgeable, accommodating and professional. All calls are returned and all questions answered.”

Adam Prime
President
Phase II Medical Manufacturing,
Rochester, NH

“I have been associated with Chris LaRocca and his company, Progressive Electrical Services for a little over 8 years now. PES has been our ‘go to’ electrical contractor for large service design and construction as well as general wiring. We’ve found they are great value especially when compared to what we get in the way of professional service from the top to the bottom of their organization.”

Geoff Spitzer
Senior Project Manager
Chinburg Builders, Inc.
Newmarket, NH

“5 Wits has worked with Progressive Electrical on multiple complex commercial projects over the last six years. Progressive’s attention to detail, good planning and communication, and their rapid responsiveness to the special needs of our projects makes them a pleasure to work with. I highly recommend Progressive Electrical as the contractor I can trust for any electrical project.”

Matthew DuPlessie
President & CEO
The 5 Wits Companies
Norwood, MA

"Not only did the PES employees jump head-first into an electrical nightmare of a project, they did so with such a great sense of professional experience, personal pride and an eye for perfection. Over the course of several months there was an effective and seamless transition from our once antique controls to our now modern day automated systems, based on the excellent workmanship of PES electricians.”

Tom O’Neill
Cement Terminal Manager
Cement Quebec
Everett, MA

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