Turbogenerators for steam and gas turbines up to 35 000 kVA, up to 15 kV
Synchronous generators for steam and gas turbines with power up to 35 000 kVA and voltage up to 15 kV, with class H insulation. They are made at the plant in Mankato, Minnesota, USA, which after its 2011 expansion produces machines up to 25 MW. They operate at industrial CHP plants and gas and steam turbine power stations.
- Power
- up to 35 000 kVA (group data); Mankato plant up to 25 MW
- Voltage
- up to 15 kV
- Insulation
- class H, VPI
- Cooling
- ODP, CACW (TEWAC), CACA (TEAAC); WP II; IP22–IP54
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The manufacturer developed turbine generators together with special motor-generator sets as demand grew in the 1990s and 2000s. According to the manufacturer, the turbine generators have ODP, CACW (air-to-water) or CACA (air-to-air) cooling, sleeve or rolling bearings, comply with the main international standards and are supplied with accessories to project requirements. They are designed to IEC, NEMA and ISO standards, meeting grid code requirements, for power supply to networks and peak coverage. The plant's quality management system is certified by BSI to ISO 9001:2015 for the design, manufacture and service of synchronous generators, motors and motor-generator sets.
The generator is brushless, AC, with a rotating field. The standard version is drip-proof; options include air filtration, an air-to-air (TEAAC) or air-to-water (TEWAC) heat exchanger in the upper casing, Weather Protected II, protection classes IP22, IP23, IP25, IP44 and IP54, and sealed windings. The stator core is stacked from electrical steel sheets in a welded steel frame with support plates. The winding is made of insulated copper coils, and the whole stator is vacuum pressure impregnated with resin (VPI). Frame sizes in the guide are designated from 4P10 to 4P75.
The rotor is salient-pole, with the pole coils wound from winding wire and spacers placed between the poles. The damper winding of copper or aluminium bars is soldered to end plates, the rotor is also VPI impregnated, and the shaft is made of high-strength rolled or forged steel. The sleeve bearings are self-aligning, with their own ring lubrication or forced oil supply, RTD temperature sensors and an insulating liner against bearing currents. The bearing housings have provision for clearance sensors and a phase marker. Excitation is brushless, from a pilot exciter with a rotating three-phase rectifier, and a permanent magnet pilot exciter (PMG) powers the voltage regulator.
For rotor condition monitoring the manufacturer offers the KRM2000 system; for protection there are diode failure detection modules and reverse power relays. Before installation the generator is stored at temperatures from −18 to 49 °C and relative humidity below 60%. Applications include industrial CHP and cogeneration, gas and steam turbine power stations, peak-load plants and oil and gas facilities.
Technical specifications
| Power | up to 35 000 kVA (group data); Mankato plant up to 25 MW |
|---|---|
| Voltage | up to 15 kV |
| Insulation | class H, VPI |
| Cooling | ODP, CACW (TEWAC), CACA (TEAAC); WP II; IP22–IP54 |
| Rotor | salient-pole, Cu/Al damper winding, rolled or forged shaft |
| Bearings | self-aligning sleeve, RTD, insulating liner; provision for clearance sensors |
| Excitation | brushless, rotating rectifier, PMG |
| Standards | IEC, NEMA, ISO; grid code requirements |
Request a price and lead time
Turbogenerators for steam and gas turbines up to 35 000 kVA, up to 15 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What are the power and voltage of the turbogenerators?
Up to 35 000 kVA and up to 15 kV. The Mankato plant, after its 2011 expansion, produces generators up to 25 MW.
Which enclosure and cooling versions are available?
Drip-proof ODP, with filters, with an air-to-air TEAAC or air-to-water TEWAC heat exchanger, Weather Protected II, and protection classes from IP22 to IP54.
How are the bearings protected against shaft currents?
The self-aligning sleeve bearings have an insulating liner and RTD temperature sensors. The housings have provision for clearance sensors and a phase marker.
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