Dry-type transformers for modular substations - October 2017 - SA Instrumentation & Control
 
classic | mobile
 

Search...

SA Instrumentation & Control Buyers' Guide

Technews Industry Guide - IIoT 2018

Technews Industry Guide - Maintenance, Reliability & Asset Optimisation

 

Dry-type transformers for modular substations
October 2017, Electrical Power & Protection


The introduction of Trafo dry-type transformers to the African market comes just at the time that end-users, in a number of industry sectors, embrace the growing trend towards modularised substations.

“Due to the benefits and the cost-effectiveness of modular substations, dry-type transformers are becoming more popular,” says David Claassen, managing director of Trafo Power Solutions. “The Trafo dry-type transformer is ideally suited to this application as it can be mounted inside a modular structure, which cannot be done with a traditional oil-filled transformer.”

Claassen highlights that safety is the prime concern in the design and construction of substations. Due to its design and the absence of oil as a coolant, the dry-type transformer is simple and safe, allowing extensive test work to be conducted with the modular unit prior to the full solution being sent to site. This in turn reduces the costs associated with site installation, assembly work and commissioning.

Including the dry-type transformer, inside of the modularised substation has the cost-saving benefit of eliminating the need for the civil infrastructure that is needed for oil-filled transformers having to be located outside of the substation for safety reasons. This type of civil work includes foundations and a plinth on which the unit can stand, as well as special purpose bunding walls to contain oil leaks This not only increases the cost of the installation, but lengthens the time frame in which the substation can become operational.

Sourcing dry-type transformers from industry pioneer and leader, Hammond Power Solutions (HPS), gives Trafo Power Solutions the flexibility to meet specific and unusual requirements from customers.

“In a recent E-house application that Trafo Power Solutions provided for a mining project in Sierra Leone, a 2000 kVA dry-type transformer was specified as part of the mobile mining unit,” says Claassen.

“We supplied four dry-type transformers in total: two 800 kVA units, one 1600 kVA unit and one 2000 kVA unit. The unusual voltage levels that were required – 13,2 kV/480 V at 60 Hz – demonstrated our flexibility in meeting specific customer requirements.”

The focus at Trafo Power Solutions is all about finding a solution for the customer, he says, outlining other elements that made this project a success. The scope of supply included temperature control units along with cooling fans. These will be automatically switched on in the event of a failure of the master cooling system and will ensure minimum downtime while the system is repaired.

Another useful function of the cooling fans is to allow the transformer to increase its power output in the event of an overload situation. Surge arrestors for each transformer were supplied as an added protection against the risk of an unstable voltage supply.

Claassen says that because these mobile mining units are transported to site and, in some instances, moved from area to area within a mine, it is critical that the structural integrity meets this type of arduous application. “Trafo transformers are engineered to withstand harsh vibration and are robust in construction, however, where required, it is possible to reinforce the rigidity further.

“We find solutions and offer flexibility through understanding the customer’s specific needs and applying an agile approach,” he says. “Traditionally, this type of equipment would be on the critical path for a project, but we managed to have them manufactured within a five-week window, which allowed for a rapid delivery to the customer.”

Claassen emphasises the high energy efficiency of these transformers, leading not only to lower energy consumption but also to less energy loss through heat; this means less is demanded from the ventilation and cooling systems on these units.

An extra benefit, especially for remote sites such as mines in rural areas of Africa, is that a dry-type transformer is virtually maintenance-free, significantly lowering its operating cost.

For more information contact Trafo Power Solutions, +27 (0)11 325 4007, david@trafo.co.za, www.trafo.co.za


Share via email     Share via LinkedIn   Print this page

Further reading:

  • One-touch advanced power quality analysis
    August 2018, Comtest, Electrical Power & Protection
    Comtest has announced the availability of Fluke’s range of three-phase power quality loggers – 1742, 1746 and 1748 – giving users fast, easy access to the data they need to make critical power quality ...
  • Specify fit for purpose engines for gensets
    August 2018, Zest WEG Group Africa, Electrical Power & Protection
    Local genset manufacturer, Zest WEG Group, believes that those involved in the purchasing decision as well as the end-users of standby power generation systems need to apply more attention to engine selection ...
  • Smart solutions to tackle energy losses for utilities
    July 2018, Schneider Electric South Africa, Electrical Power & Protection
    The pressure to improve energy efficiency is constant and intense, particularly for electric utilities, since changes to power production and distribution can have a cascading effect that influences the ...
  • Trafo dry-type transformers for DRC mine
    July 2018, Electrical Power & Protection
    Alphamin Resources’ remote Bisie tin mine is being supplied with fit-for-purpose dry-type transformers by Johannesburg-based Trafo Power Solutions, in a fast-track project that will see the complete solution ...
  • Latest generation compact inverters from Mitsubishi Electric
    June 2018, Adroit Technologies, Electrical Power & Protection
    Mitsubishi Electric has now introduced its latest generation of compact inverters, the FREQROL-CS80 series.
  • Demand more from low voltage systems
    June 2018, Schneider Electric South Africa, Electrical Power & Protection
    Schneider Electric has an innovative high breaking capacity for the Compact NSX range of moulded case circuit breakers (MCCBs), offering users more from their low voltage (LV) infrastructure and a cost-effective ...
  • Onsite oil treatment saves transformers
    June 2018, Zest WEG Group Africa, Electrical Power & Protection
    With what is claimed to be the largest mobile oil regeneration plant in Africa, WEG Transformers Africa (WTA) plays a vital role in extending the life of South Africa’s transformer population and preventing ...
  • Optimising a wind-farm layout
    June 2018, Electrical Power & Protection
    Governments around the world know the importance of supplementing fossil-fuelled energy with renewable energy in an effort to ensure a greener and cleaner environment for our planet. Wind is a renewable ...
  • LED lighting for manufacturing
    May 2018, RET Automation Controls, Electrical Power & Protection
    Save costs while improving productivity.
  • New soft starter with internal bypass
    May 2018, Rockwell Automation, Electrical Power & Protection
    The new Allen-Bradley SMC-50 smart motor controller with internal bypass from Rockwell Automation brings greater operational control over motor starts and stops. As an extension of the soft starter family, ...
  • Stakeless earth ground loop testing
    May 2018, Comtest, Electrical Power & Protection
    Testing the grounding components of equipment in hard to reach spaces, including areas that are indoors or fully paved and do not permit driving auxiliary test stakes, is challenging. Comtest now offers ...
  • Conductive level switches
    April 2018, Instrotech, Electrical Power & Protection
    The latest in Kobold’s NEK range of conductive level switches is a complete, functional unit that reliably monitors the limit level of conductive media, even under heavy process conditions. Whether used ...

 
 
         
Contact:
Technews Publishing (Pty) Ltd
1st Floor, Stabilitas House
265 Kent Ave, Randburg, 2194
South Africa
Publications by Technews
Dataweek Electronics & Communications Technology
Electronic Buyers Guide (EBG)

Hi-Tech Security Solutions
Hi-Tech Security Business Directory

Motion Control in Southern Africa
Motion Control Buyers’ Guide (MCBG)

South African Instrumentation & Control
South African Instrumentation & Control Buyers’ Guide (IBG)
Other
Terms & conditions of use, including privacy policy
PAIA Manual





 

         
    classic | mobile

Copyright © Technews Publishing (Pty) Ltd. All rights reserved.