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Hospitali ya rufaa Mbeya inakabiliwa na upungufu mkubwa wa madaktari bingwa.
Hospitali ya rufaa Mbeya ambayo ipo kwenye mchakato wa kubadilisha jina na kuitwa hospitali ya kanda ya nyanda za juu kusini, inakabiliwa na upungufu mkubwa wa madaktari bingwa hali ambayo...
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Mvua zinazoendelea kunyesha sehemu mbalimbali mkoani Tabora zaua watoto wanne.
Kufuatia mvua zinazoendelea kunyesha sehemu mbalimbali mkoani Tabora, jumla ya watoto wanne wamepoteza maisha kwa nyakati tofauti kwa kutumbukia katika madimbwi yaliyojaa maji huku mmoja akiwa na...
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Preventing noise in signal cables
Noise, also known as interference, is defined as an interruption caused to the originally transmitted signals by some unwanted stray signals, generated in the wires of the signal cable. Interferences...
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Tariff and metering for low voltage systems
Different countries, regions, and power utility companies use different variables for billing and tariff structures. The primary objective of this article, thus, is not to focus on particular tariffs,...
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How to calculate the load? (back to basics)
One of the important things in the design of an electrical installation either on middle or low voltage is to choose the right conductor for the given consumers. Therefore, in this article I will...
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New generator creates electricity directly from heat
Scientists from Germany and the U.S have recently developed a thermionic generator which is capable of converting heat and light into electrical energy. This new invention is said to overcome the so...
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Mobile Substations : features and applications
The primary function, or purpose of a mobile substation is to provide temporary restoration to power supply through circumventing faulty or damaged low and medium voltage substation systems(up to...
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4 qualities every power protection system should possess
In power generating stations, all most all electrical circuits and equipment tend to generate faults. This is generally caused due to insulation fail between conductors and ground, or due to fail of...
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What is SCADA?
Introduction SCADA? SCADA (Supervisory control and data acquisition) is a system that is being used in different manufacturing processes. In energetics, SCADA systems are used in substations,...
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Common electrically conducting materials used in electrical cables
The primary purpose of cables is to provide a conduit for power transmission from the source to the end user. Over the years, engineers and scientists have worked tirelessly to get the best materials...
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Cable trays: even faster to install
here is no lack of innovation in the field of cable management systems for wires, cables and optical fibers. Not so surprising as cable management systems represent a significant cost in labor and...
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RC and RL Loaded Diodes
Introduction Up till now we have studied quite a lot about the basics of diodes. Taking a quick revision, we came to know that how do semiconductor power diodes acts as switches, how their electrical...
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Benki ya Standard Chartered yateua Mkurugenzi wa kwanza Mtanzania
Sanjay Rughani (pichani) anakuwa Mtanzania wa kwanza kuiongoza benki ya Standard Chartered Tanzania akipokea uongozi wa benki hiyo kutoka kwa aliyekuwa mkurugenzi wake, Liz Lloyd, ambaye amerudi...
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Introduction to Semi Conductors
Introduction Here we are going to start a detailed tutorial on power semiconductor switching devices, which will give you a brief but explanatory overview of semiconductors and the semiconductor...
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Low Voltage AC drives – their characteristics & their applications
What are AC Drives? There are adjustable speed drives that control the speed of DC and AC motors. The speed of an AC motor is determined mostly by two factors i.e. the frequency applied and the number...
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Step Up and Step Down Transformers
What is a transformer? Transformers are devices that change (transform) the voltage of power supplied to meet the individuals needs of power consumers. It uses the principle of electromagnetic...
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Generating Electricity Using Triboelectric Generators
With everyday advancement in technology, researchers are always trying to find cheap ways to generate energy. They are trying to find means to produce electricity by using wasted or small energy...
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Reverse Conducting and Gate Turn off Thyristors
Introduction Up till now we have become pretty much familiar with the properties, types and uses of thyristors. We came to know their diverse applications in the field of electrical technology....
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Single and Bidirectional Phase Controlled Thyristors
Introduction One directional thyristor , also known as Silicon Controller Rectifier (SCR), is actually nothing more than a simple four layered current controlling device that allows passing current...
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Types of Thyristors
One of the most interesting things about thyristors is that they are manufactured in a unique way by the process of diffusion. We have already studied the working characteristics of a thyristor and...
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