Post on 03-Feb-2022
With N2P Control’s Chartered Process Engineer’s help, Hynds Environmental wins their first major package water treatment plant project.
Not only can N2P Controls offer Electrical/Electronic automation design assistance, but can help with process engineering design, therefore, offering a fully package solution. This package solution helps give our clients a competitive edge.
Background
Turangi is located on the southern end of
Lake Taupo. The region around Turangi is
known for being The Trout Fishing Capital
of the World. It also boasts excellent
hunting, mounting biking, tramping, white
water rafting, skiing, and sightseeing.
Despite being surrounding by some of
the cleanest water in the world, the 3,500
people of Turangi did not have a water
treatment supply that met with the New
Zealand Drinking Water Standards 2005
(rev. 2008).
Problem
Turangi’s existing water treatment plant was
built in the 1950s, and consisted of taking
water from a natural spring, dosing with
chlorine and hydrofluorosilicic acid (HFA)
before pumping it to a reservoir. To meet
the revised New Zealand Drinking Water
Standards (NZDWS) the plant needed a
significant upgrade.
Taupo District Council put out a tender for
the upgrade of the Turangi Water Treatment
Plant. With N2P Controls’ resident Process
Engineer, Niki Johnstone, assisting Hynds
Environmental Systems Limited (HESL) won
this contract.
Solution
The upgrade included UV treatment,
chlorine dosing, hypochlorite dosing and
provision for future filtration. The tender
asked for the plant to be fully automated
with a telemetry link back to Taupo
District Council’s Service Centre, to allow
remote monitoring and control, and the
water reservoir, which is located 500m
away from the treatment plant. The plant
required a HMI at the plant to allow for local
monitoring and control.
N2P Controls won the contract to supply
the automation and telemetry link for HESL.
N2P Controls’ Niki Johnstone worked
with all parties involved with this project
including HESL, Harrison Grierson
(HESL’s Process Engineer) and Taupo
District Council to provide the Functional
Description for the new treatment plant.
Once authorised, N2P Controls, sourced,
programmed and installed the PLC and HMI
into the new Motor Control Cabinet. N2P
Controls also interfaced with the telemetry
system supplied by QTech.
N2P Controls’ own Design Engineer, Peter
Taylor, wrote the PLC program and was
on site to assist in commissioning. His
electronic, electrical and programming
CASE STUDYHelping Turangi Meet New Standards
Client Taupo District Council
Project Turangi Water Treatment
Plant Upgrade
Solutions Delivered Unitronics PLC & HMI Telemetry
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www.n2pcontrols.co.nz
background, coupled with his extensive
industry experience, makes Peter an ideal
partner to have on site to quickly overcome
any commissioning hurdles.
The Technical Stuff
The PLC and HMI used was a Vision 130
from Unitronics (an Israeli based PLC
manufacturer). The PLC used its propriety
communication protocol to communicate
with the HMI, and used Modbus TC/IP to
communicate with the QTech telemetry
unit. The PLC had 25 digital I/O points, 10
analogue I/O points and over 50 Modus
addresses that interfaces with the telemetry
unit. The PLC was housed within the main
MCC cabinet with the VSDs mounted
separately.
Outcome
With N2P Controls being able to
supply the automation design, supply
and commissioning assistance as a
package solution, it reduced the number
of contractors Hynds Environmental
had to work with, and allowed Hynds
Environmental to focus on deliverying a
successful project for their client. John
Bradford, Construction Manager at Hynds
Environmental, “Says the experience and
product knowledge of N2P Controls’ staff
ensured that we could entrust them with
automation of this project and freed us up
to focus on the installation of this project.”
N2P Controls prides itself on offering a
total package solution with engineering
assistance from a Chartered Process
Engineer, design and build of the
MCC cabinet, PLC procurement and
programming and on site commissioning
assistance.
Let N2P Controls help make your next
project a success.
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N2P Controls Limited 23A Queens Road, Panmure, Auckland 1072T +64 9 570 1919 F +64 9 570 1969 sales@n2pcontrols.co.nz
MEDBUS PROGRAMMING
CASE STUDY
Helping Turangi Meet New Standards
www.n2pcontrols.co.nz