Variable frequency drive panels for pumps, fans and hydro-pneumatic systems — pressure control, duty and standby changeover, dry run protection and trip annunciation.
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A pump throttled by a valve is a motor working at full speed to push against a closed door. A VFD slows the motor to the flow you actually need. On a pump running most of the day, the energy saved usually pays for the drive and the panel within the year.
For building and plant water systems we build panels with pressure transducer feedback, PID control, duty and standby pump changeover on run hours, and dry run protection so a pump does not burn out on an empty sump.
Danfoss, Delta and ABB. The drive is sized to the motor and the duty, with the right braking and filtering rather than the cheapest catalogue match.
| Drives | Danfoss, Delta, ABB |
| Control | Pressure transducer + PID |
| Changeover | Duty / standby on run hours |
| Protection | Dry run, overload, phase failure |
| Indication | Trip annunciation, run hours |
| HMI | Optional Delta touch HMI |
On a variable-flow load like a pump or fan, yes — often substantially. On a constant full-load motor, the saving is small and a soft starter may be the better buy. We will tell you honestly which one your application needs.
Usually yes, provided the motor is suitable and the cable run is not too long. We survey it before quoting.
Send us a load list, a single line diagram, or just describe the machine. We reply the same day.
