One of the Missouri plant’s four generators was out of service due to the failing step-up transformer, which increases the voltage of electricity that is generated by the turbine so it can be transmitted through the grid to homes and businesses.
The 500t capacity heavy track system skidded the transformer 120ft clear of the existing foundation before a replacement was unloaded from a self-propelled modular transporter (SPMT) and slid into position, again utilizing the HT500.
Both transformers weighed approximately 400t; the replacement unit was designed to be as close a match to the original as possible.
Steve Hentrich, project engineer, HWP Rigging, said: “We started removal of the failed transformer on a Friday afternoon and worked around the clock until the replacement transformer was set in its place, working five consecutive shifts until Sunday morning. We spent two to three days on the front and back end mobilizing equipment and assembling / disassembling the modular trailer onsite. The work was completed ahead of schedule and without incident.”
HWP owns four HT500 skidding systems, from Canada-based manufacturer Hydra-Slide, which are typically employed in the power distribution sector.
The company also has a Hydra-Slide 500t capacity turntable, which they have recently used to lift and remove an overhead bridge crane in a foundry, hold it for a short time, and place it back on its foundations in one continuous motion.
Hentrich said in recent years HWP has observed an increasing demand for transportation and rigging of new power distribution and generation equipment to replace our ageing infrastructure.
“This equipment includes large power distribution transformers, steam turbines, generators and industrial electric motors. In some cases new equipment is installed as part of a scheduled maintenance project. Other times failed or failing equipment must be quickly replaced in order to restore power to homes and businesses,” he said.
