Thermal Power Plant

Application: ID Fan with 6.6kV Motor
Replacing existing DOL with fluid coupling speed control with MV VFD and flexible coupling.

Customer:Thermal Power Plant
Power Plant Capacity:210MW
ProjectID fan VFD Package for one unit of 210MW based on a single point responsibility of turnkey execution.
Application:ID Fan with 6.6kV Motor

India’s largest energy conglomerate with roots planted way back in 1975 to accelerate power development in India. Since then it has established itself as the dominant power major with presence in the entire value chain of the power generation business. From fossil fuels it has forayed into generating electricity via hydro, nuclear and renewable energy sources. The total installed capacity of the company is 58,156 MW (including JVs) own stations include 24 coal based, 7 gas based, 1 Hydro 1 Wind 11 Solar and 1 Small hydro plant.


Customer Side

As the loading of a power plant can vary from minimum load to peak load due to various internal and external factors, the plant’s processes have to be adjusted accordingly. Driving the pumps with fixed speed motors and controlling them at partial loads either by throttling or mechanically by fluid coupling decreases the power plant’s efficiency tremendously.

As a vendor

  • Being a PSU customer, it was a L1 based tender with very stringent BQR requirements.

  • Qualifying for BQR for a Turnkey project of civil, mechanical and electrical.

  • Long tendering process and then log execution of project.

Major Challenges were

  • Replacement of fluid coupling with flexible coupling.

  • Retrofit requirement in quite an old plant.

  • Assurance for high efficiency system.

  • Winning over competition in L1 bidding process.


A complete turnkey solution of electrical, civil and mechanical with replacement of existing fluid coupling control to flexible coupling with VFD control. Imput VCB, Motor and Fan retained as it is. New solution with high efficiency for maximum benefits of energy saving and process control.


Power plant efficiency

Operating ID Fans with variable speed drives with flexible coupling in place of DOL with fluid/hydraulic coupling has significantly increase the efficiency of a power plant.

Solution implemented with maximum benefits of HT component VFD with external ONAN type transformer.

Reduced maintenance

Using ACS2000 variable speed drives as speed control device reduces maintenance overburden of fluid coupling substantially.

Further savings

Supreme benefits of energy savings with a very short ROI.

Key features & benefits

  • Highest reliability and availability

  • High efficiency, > 98 % converter efficiency

  • Lowest lifetime costs and lower maintenance cost

  • Small footprint and overall physical size

  • Greatest transformer flexibility

  • Full compliance with international standard

  • Remote Monitoring benefits

Project has been successfully commissioned and handed over to plant maintenance well within contractual timelines. 



Click one of our representatives below to chat on WhatsApp or send us an email to

× How can we help you?