Name: Medium & High Voltage Motors
Brand: TECO / TECO-Westinghouse

Medium & High Voltage Motors industrial motor solution

Medium & High Voltage Motors specifications and applications

These motors are engineered for each application and can be supplied in IEC or NEMA specifications.

Rugged box-frame construction, advanced bearing systems, and heavy-duty rotors support dependable service in harsh plants.

75 to 30,000 HP
Up to 13.8 kV
2 to 34 poles
TEFC, TEAAC, TEWAC, ODP, WPI

Medium & High Voltage Motors product image

Engineering considerations

Load-sharing replacement motors

When two motors drive one machine in parallel, replacing one motor requires tight matching of electrical and mechanical behavior so load sharing remains stable.

Match torque curve, speed slip, efficiency, inertia, cooling, and starting behavior
Preserve shaft height, shaft end, feet, terminal box, and coupling interface
Relevant to HPGR, mills, pumps, fans, compressors, and other paired-drive systems

Cooling system enhancement

Aging motors often need improved cooling to handle hotter ambient conditions and longer duty cycles while preserving the existing mounting envelope.

Review cooling path, airflow, heat exchanger selection, and cooling class
Improve thermal margin without changing the foundation, coupling, or terminal arrangement
Recovered example: 4,600 kW motor cooling upgraded from IC511 to IC516 while frame size reduced from 1250 mm to 900 mm

Identical terminal-box replacement

Replacement motors can be designed with identical main and auxiliary terminal boxes to avoid site cable, terminal, and commissioning changes.

Match dimensions, cable connections, and terminal locations
Reduce shutdown risk during commissioning
Especially useful in brownfield replacements where cable routing is fixed

Torque and speed-curve matching

Replacement designs must consider existing load curves, starting current, and speed-torque behavior so the new motor remains compatible with the driven machine.

Match original speed-torque curve and starting behavior
Reduce inrush current where possible
Keep adequate torque safety factor during network voltage drop and soft-start operation

VFD-compatible motor replacement

VFD-compatible motors require review of the original drive design, harmonic effects, insulation stress, and the ability to operate without changing existing drive settings.

Account for THD and high-voltage spike insulation stress
Use motor and VFD design data during replacement engineering
Witness testing can simulate real operating conditions and load

Related case studies

HPGR load-sharing motor replacement

A high-pressure grinding roll application required one motor to be replaced while the remaining parallel motor stayed in service.

Open Case Study

Cooling upgrade for 4,600 kW replacement motor

An ELIN motor replacement was redesigned with an upgraded cooling system while preserving the installation envelope.

Open Case Study

Twin boiler feed pump replacement

One of two Siemens 630 kW, 6 kV, 10-pole boiler feed pump motors was replaced without site modifications.

Open Case Study

Identical terminal-box brownfield replacement

A brownfield replacement motor was engineered with main and auxiliary terminal boxes matching the original motor layout.

Open Case Study

Torque and speed-curve matched replacement

A replacement motor design was matched against the original speed-torque behavior and driven-machine load curve.

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Obsolete motor drop-in replacement without site changes

An old and obsolete motor was replaced with an upgraded modern design while keeping the installation footprint stable.

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Sea-water pump synchronous motor replacement

A 60-year-old Westinghouse synchronous motor for a sea-water pump was replaced even though no site drawings remained available.

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VFD-compatible slurry pump replacement

A copper mine slurry pump motor was replaced with a VFD-compatible design and improved electrical performance.

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Hazardous gas compressor motor package

A gas transmission compressor application used an 8,400 kW, 11 kV, 4-pole motor package with hazardous-area requirements.

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District cooling chiller motor references

Project references show extensive medium-voltage motor use in GCC district cooling plants.

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