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Madison Park Technical Vocational High School Monorail Hoist Control Upgrade

This large vocational high school in the heart of Boston has a motor driven trolley and hoist on a curved monorail that can be controlled from two levels of the facility with a maximum lift of nearly 50’. The controller was a traditional style, hardwired pendant which need to be rolled up when in use at the upper level and was continually being dragged and damaged. In addition, when being driven into the upper level barn door entrance, reaching out to access the pendant and pull it up was dangerous for the operator. Because this is a multi-speed hoist and trolley piece of equipment, utilizing very old wound rotor/slip ring /resistor control architecture, utilizing a radio control package would be difficult. PES re-designed the speed control logic, rewired all of the  controls and integrated a radio controller into the system.


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
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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