Rainbow Technologies
Electrical Engineer in Durban

Our primary focus is on measurements, investigations, analysis and design.
Rainbow Technologies has been providing specialist electrical engineering since 1989.

Good Electrical Power Quality is extremely important to modern equipment and industrial processes. Modern electronic equipment is highly sensitive to supply voltage distortion and short term under-voltages (voltage dips or sags), resulting in equipment malfunction/failure and production losses. These transmission lines are subject to lightning, bird activity, trees, bush/cane fires, insulation pollution, equipment failures etc.All these factors result in a large number of unavoidable faults, with consequent voltage dips until the faults are cleared. The voltage dips cause equipment malfunction/failure with subsequent production loss and/or impact on human safety. Harmonics The proliferation of VSD's combined with low fault levels has created heightened levels of harmonics. This ensures equipment tolerance as well as compliance with the electrical supply authority. Flicker causes human annoyance and onset of convulsions with epileptic. Flicker is caused mainly by open arc electric furnaces. Impulses are propagated through the electrical networks due to lightning and switching transients. Equipment has to be correctly specified (BIL) and adequately protected (correctly applied and specified surge arrestors). Additionally the electrical system must be adequately earthed and bonded. Analysis, Audits, Modelling, Designs Audits, Feasibility studies, Measurement & Verification, Metering systems, Designs of energy efficiency solutions, Green Building designs etc. Feasibility Studies Feasibility Studies from Greenfields generation to optimising existing facilities Financing Financing of projects from initial query stages Project Management Operating as owners engineers for the generation project. The main functions of the Protection System are detailed below (in order of importance) To safeguard the entire system to ensure continuity of supply in the event of a fault Discrimination is key here (effective isolation of faulted portion of network whilst keeping healthy portion live). To minimise damage and repair costs This relates to IRt as arc flash can render equipment irreparable and can also erode upstream components due to thermal damage (i.e. In order for these criteria to be satisfied, the following basic requirements are necessary. Rainbow Technologies makes use of ERACS Power System Simulation tools (checked using basic principles) to ensure effective Protection Design in order for the 4 basic requirements to be met as detailed above. Rainbow has extensive experience in the 21 years of operation in the following protection areas. Specialising in co-generation applications with islanding settings (frequency, rate-of-change of frequency, voltage deviations, reverse power etc).