Index of Products

Master Highlights

Variable Speed Controller Applications:

Eliminating PRVs Loop Systems Dual Use Water Hammer Genset Savings
Foam Systems Poor Water Supply High Rises Dual Water Supplies

Reducing Standby Generator Set Sizing

Reducing Genset Sizing:
NFPA-20 2010 paragraph 9.4.3 allows the voltage drop to be no lower than 15% while starting, or 30% in bypass. Given this, a typical application for a 150 hp motor utilizing soft starting, a gen-set manufacturer's sizing program would select a 250 kW gen-set. For the same application, the program would select a 125 kW gen-set when using a variable frequency drive and a primary reactor bypass with a 30% starting voltage drop, effectively cutting the gen-set in half.

It is important to remember that the average cost / kW is $300 - so cutting 125 kW from your generator by using Master's Variable Speed Fire Pump Controller equates to an average savings of $37,500!

If you would like more information on how Variable Speed (VFD) Fire Pump Controllers can reduce the size of your standby generator, please take a look at Slides 35-39 or contact Master Control Systems.