Electricity + Control September 2019

round up ENERGY MANAGEMENT + ENVIRONMENTAL ENGINEERING

Monitoring energy consumption dozens of traditional sub-meters with an all- in-one system that streamlines the power monitoring process. “Using the EG4100 Series, managers can monitor a range of energy parameters, including volts, Amps, kilowatt hours and power factor. The unit acts primarily as a current transformer (CT) meter and works with both standard CTs and Rogowski coil- based sensors. The Pro model accepts 30 CTs and the Core model receives 15. “Importantly, the EG4100 Series delivers revenue-grade monitoring for better insights into how employees, tenants and/or systems are using power, as well as how effectively solar and other power solutions are generating energy.This makes it suitable for a wide range of applications such as utility sub-metering, property management, lights/ loads/ and HVAC reporting, facility metrics, benchmarking and alerts.” Campling adds that the system enables customers to analyse metering information through a user interface to a cloud-based dashboard that presents a

powerful, straightforward and granular way to visualise energy data. The customisable graphical view can be set to display – or hide – any number of monitoring points, so users can view data formatted for relevance.The monitoring points are shown with user-defined time periods, so it is easy to analyse data, ranging from minutes to months or years. Further benefits include data updates every second for live monitoring, custom alerts that enable users to act if energy readings fall outside set parameters, and comma-separated values to facilitate data exports for reporting. The series also provides for reports on energy production versus energy usage, supporting eco-aware sustainability initiatives, as well as daily, weekly and monthly summaries so that users can understand energy-use patterns over different time periods. Enquiries: EucaTechnologies. Tel: (0)10 007 5278, email: sales@euca.co.za

A new, cost-effective energy monitoring system enables building owners and facility managers to monitor and manage energy consumption using advanced sensors and an easy-to-use cloud-based operating system. Distributedby local technology integrator, Euca Technologies, on behalf of one of the world’s leading logging and monitoring systems specialist companies, Onset Computer Corporation, the new EG4100 Series systems from Onset combine an energy meter, current transformers and cloud-based dashboard for seamless, simple, real-time energy monitoring. The systems provide for accurate and cost- effective management of energy for buildings. Euca Technologies Managing Director, Ernest Campling, says the core of the EG4100 Series is a revenue-grade power meter that combines an energy meter, data logger and web server in a single integrated unit. Offered in 15- and 30-input models, the series allows customers to replace

Six-week turnaround on turbine generator overhaul

At its repair facility in Cleveland, Johannesburg, Marthinusen & Coutts also performed a number of inspections, tests and repairs on the rotor. Dimensional inspections and electrical tests were conducted, as well as non-destructive testing such as the phase array test. Slip rings were ground, the diode wheel was inspected and the diodes were tested.

Marthinusen & Coutts, a division of ACTOM, working with business unit ACTOMTurbo Machines, recently completed a major overhaul on a 70 MVA turbine generator set for South 32’s Metalloys within six weeks. This achievement showcases the divisions’ capacity to handle large mechanical and electrical refurbishments. According to Mike Chamberlain, Marthinusen & Coutts’ Marketing Executive, the customer did not want to split the responsibility for the complete generator and turbine drive train between separate contractors. “Marthinusen & Coutts’ and ACTOM Turbo Machines’ capabilities enable us to control the entire process. This offers peace of mind to customers, as well as optimised cost efficiencies,” says Chamberlain. “It also reduces customers’ risk and the managerial effort involved in dealing with multiple suppliers.” The electrical generation plant is at Metalloys’ manganese plant in Meyerton, Gauteng. The scope of the overhaul included a complete inspection of the turbine rotor and internal components, as well as runout and dimensional inspection on the rotor. Inspections incorporated glass bead blasting and non-destructive testing of many components. High-speed balancing of the 13-tonne rotor was conducted and turbine rotor journals were repaired. White metal bearings were relined and the thrust bearing was modified to improve fitment in the bearing casing. Positive material identification tests were conducted on all the studs, nuts and shaft seals. A complete 3D scan was done of the centreline to inform reverse engineering drawings.

ACTOMTurbo Machines inspected and refurbished the auxiliary mechanical equipment. This included lubrication and control oil systems, pumps, coolers, and white metal bearings on ID and FD fans. ACTOM Turbo Machines Project Manager, Hannes de Jager notes that an overhaul of this magnitude and scope would usually take over two months. “The excellent working relationship we had with Metalloys’ technical staff and the cooperation we got from them certainly contributed to completing the work as quickly as we did,” says De Jager. Starting the inspections, tests and repairs in July, the team completed the overhaul by mid-August. Enquiries: Marthinusen & Coutts. Visit: www.mandc.co.za

Marthinusen & Coutts recently completed a major overhaul on a 70 MVA generator set.

Electricity + Control

SEPTEMBER 2019

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