← All engineering tools

Electrical calculation

Pump station
generator sizing

Estimate the generator capacity required to run and start pump motors. Compare conventional starting, standard six-pulse VSD and low-harmonic VSD cases, then create a preliminary PDF report.

Registration required for results

Enter your project values.No project assumptions are preselected. Example placeholders show the expected format only; the user must enter and verify every value before calculating.

01 / Project inputs

Define the operating case

Your details

Required so Metsiworx can retain the calculation record and contact you if an engineering concern is identified.

Project

Pump motors

Starting-current multiplier entered—

Starting sequence and other loads

Auxiliary loads may include controls, lighting, ventilation, dosing, grinders and other essential equipment.

Advanced assumptions Adjust supply and design margins

Use the generator manufacturer's combined altitude and ambient-temperature derating factor. Leave at 100% when no derating is applicable.

Calculation basis

Transparent assumptions.
Engineering review remains essential.

01

Running demand

Motor shaft rating is converted to electrical input using efficiency and running power factor, then combined with essential auxiliary loads.

02

Starting and VSD demand

Conventional starting uses an adjustable current multiplier. VSD cases add an adjustable generator-loading limit to account for nonlinear load and harmonic performance.

03

Generator selection

The governing continuous, starting or VSD allowance is adjusted for design margin and site derating, then rounded up to a common rating.