Variable Speed Inverter Control of Pumps

What is it?

It consists of pumping system control via frequency inverter speed variation of electric motors.

Why? What are the advantages?

1. Reduces power consumption thus saving energy costs.
2. Reduces wear on pumps and motors, cuts cost of spares and repairs.
3. Cuts downtime due to pump failures.
4. Simple controllability if the pump performance requirement changes.
5. Built-in dry-running protection.
6. Electrical safety features built into the inverter mean a control panel is not needed.
7. Motor life is increased due to low starting current and built-in protection features.
8. Smooth pump operation minimises water hammer and noise. No large pressure vessels are needed so saving space.
9. Inverters can "talk" to each other so that two or more pumps can work together as "duty/standby" or "duty/assist".
10. No need for wasteful "throttling" valves or by-pass systems to reduce flowrates on oversized pumps.
11. Inverters can be retro-fitted to existing pumps.
12. Pumps can maintain a constant pressure irrespective of demand, for example in a factory ring main.
13. Pumps can maintain a constant flow rate irrespective of pressure changes, for example in a heating circuit.

For more information, contact Les Cotton Pumps Ltd:

Email:
International	U.K. Local Rate
Tel: +44 1392 851699	Tel: 0845 458 2892
FAX: +44 1392 851840	Tel: 0845 458 2903
Mail: Les Cotton Pumps Ltd., Nettacott, Upton Pyne, Exeter, EX5 5HX, U.K.