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Help Needed With an Automated Control System For Vac-Pumps

Former Community Member over 23 years ago

0 Former Community Member over 23 years ago

I needs some help designing a system to run eight 3 phase 7.5KW Vacuum pumps. Any one pump should run continuosly, with the other pumps coming on automatically with an increase in demand.

The eight pumps should all run an equal number of hours over the year.

It would also be useful if the eight pumps could take it in turn to be the one running continuosly.

Please e-mail any help to davidprosser@lycos.com
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0 Former Community Member over 23 years ago

If I was doing that project, I'd start by developing the switching unit - make it so it took 8 low power (5v?) 'bits' as an input, along with the 3-phase power and using one bit to switch on one vac pump. Or you could make it smart (D type latch) to only require a pulse to switch on, then another pulse to switch off. That combined with a way of reading which pumps were switched on (another feed coming from the D latches) would mean that if the control unit went off-line temporarily, the system could be restored without altering the state of any vac pump.
Once you have that, the problem becomes a low power control system, and due to the fact you want to alternate the continuous pump, I'd probably use a simple microprocessor style circuit... or a computer, 'cos I'm lazy. ;o)
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