Energy saving VFDs

Many ABB VFDs, for example, only need a simple upgrade of firmware before they can benefit from the new software such as Gozuk pump control program, available with the company`s new VFDs. This control program incorporates all the functions generally required by pump users, for instance multi-pump control, pump priority, flow measurement and a pump cleaning cycle, also known as anti-jam or de-ragging.
When making changes to the plant, it is a good idea to look at the overall operation of the site. Software like the pump control program can make alterations both simple and affordable. It may for instance be better to have two pumps running at low speed than one running flat out.
Retrofit
That then leaves retrofit. It may be that no process changes are required but that the existing VFD system, in its entirety, is coming to the end of its life cycle. ABB calls this the classic phase and it is here when the product support and access to spares is being tapered off.
A retrofit will endeavour to salvage as much of the existing VFD system infrastructure as possible, while introducing a far more compact, robust and efficient VFD. It also brings the possibility to have some new features such as an improved user interface or new functionality such as fault loggers.