Services
Variable speed drives, soft starters and motors
We select, install and commission variable speed drives, soft starters and motors for pumps, fans, conveyors and machines, and set them up to suit the load instead of leaving them on factory defaults.
What we do
- Drive and soft starter selection and sizing for the actual load
- Replacing direct-on-line starters to cut start-up current and mechanical wear
- WEG motors and drives supplied and installed
- Constant pressure and level control straight from the drive, or through the PLC
- Cabling, earthing and filtering that keep drives from upsetting other equipment
- Fault finding on tripping drives and failed motors
Problems we solve
- A pump that hammers the pipework every time it starts
- A drive that trips and nobody knows why
- High power bills from pumps and fans running flat out all day
Brands: WEG motors and drives, plus drives from the main control brands we work with.
Examples of this work
Danfoss VLT variable speed drive with fused isolator in a switchboard
Variable speed drive and isolator controlling a pump in a block pump shed
Motor control panel with motor protection breakers, contactors and a variable speed drive, tagged out
Four variable speed drives being wired on the workshop bench
Control panel with large variable speed drive and motor starters
Control panel with variable speed drive, controller and contactors in a shed
Questions
Will a VSD save power?
On pumps and fans that do not need full speed all the time, usually yes, because the power drawn falls sharply as the speed drops. On a load that always runs flat out the saving is small, and we will say so.
Do drives cause problems with other equipment?
They can if they are installed poorly. Correct cable, earthing and filtering prevent most interference and motor bearing damage.
Where this work is used
Irrigation and arable
Bore and irrigation pumps with constant pressure control, flow records and remote start.
More
Water and pumping
Pump stations, reservoirs and private water schemes: control, telemetry and protection.
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Quarries and plants
Feeders, conveyors, cranes and process lines: switchboards, drives, PLC control and breakdown cover.
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