N2P CONTROLS – CALM UNDER PRESSURE

One of the largest construction projects currently operating in Canterbury is the Central Plains Water Limited Scheme, which has a current estimated construction cost of $385 million.
Stage 1 alone irrigates approximately 20,000 hectares of farmland in the Canterbury Plains in an area bordered by the Rakaia and Hororata Rivers.

HOW IS IT ACHIEVED?
This is done via a piped reticulation system distributing water to the farm gate at a pressure of roughly 40 head metres. Where gravity does not provide adequate pressure, three pumping stations have been installed to boost line pressure. Within each station, vacuum pumps are used to ensure the massive Grundfos Irrigation Pumps are kept primed so they can run uninterrupted. A large central vacuum system, maintained by two Gardner Denver blowers feeds the independent vacuum pumps throughout the Station. Each control unit monitors the pressure in up to eight pumps while independently maintaining the vacuum in each of these pump lines.

OUR INTEGRATED SOLUTION
The whole system is controlled by a custom-built N2P Controls unit. By offering a package solution of PLC, HMI and MCC design and build we produced a solution that not only met the stringent needs of this enormous operation, it also delivered efficiencies and cost savings to our client.

THE RESULTS
Our client has been successfully running Stage 1 now for over 18 months. They are so impressed by our ability to handle this scale of operation, and the solution we created, they have recently approached us to start working on Stage 2 of the Central Plains Water Limited Scheme. If we are able to remain calm under this much pressure, what can we do for your operation?

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