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[ { "title": "NEW SERIES | Understanding Net Metering - Part 3", "nid": "467", "body": "\u003Cp\u003EWe\u0027re wrapping up our series on Net Metering by taking a closer look at Kwa-Zulu\u00A0Natal. What\u00A0progress has been made in integrating Small-Scale Electricity Generation (SSEG) into the local electricity network? Read our article to find out more.\u00A0\u003C/p\u003E\n\u003Cp\u003EDid you miss out on previous articles in our Net Metering series? Click below to catch up now:\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--Understanding-Net-Metering---Part-1\u0022\u003E\u003Cstrong\u003EPart One - what is net metering, how does it work and what are its benefits?\u003C/strong\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--Understanding-Net-Metering---Part-2\u0022\u003E\u003Cstrong\u003EPart Two - learn more about the device used in net metering\u003C/strong\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E\u003Cu\u003ENet Metering in Kwa-Zulu Natal\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EeThekwini municipality will be launching a pilot program to enable the integration of Small-Scale Electricity Generation (SSEG) to the local electricity network. The purpose of this is to:\u003C/p\u003E\n\u003Col\u003E\n\u003Cli\u003EFacilitate the safe and orderly interconnection of SSEG systems\u003C/li\u003E\n\u003Cli\u003EProvide investment certainty and fair compensation to SSEG customers.\u003C/li\u003E\n\u003Cli\u003EPromote local economic development and job growth through the creation of a local SSEG industry.\u003Cbr /\u003E\n\t\u00A0\u003C/li\u003E\n\u003C/ol\u003E\n\u003Cp\u003E\u003Cstrong\u003E\u003Cu\u003EHow to Apply to be a SSEG \u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EAn application process has been created to collect and assess information with regards to the connection of SSEG systems to the grid. An approval must be obtained from the municipality before the installation can commence. The installation must adhere to the technical guidelines set out and must be done in a safe and according manner.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E\u003Cu\u003EWhat is the Feed in Energy Rate for the Pilot Program?\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003ESSEG customers will be able to consume the electricity that is produced on site thus reducing the energy costs. There are various tariffs that are set out depending on whether it is a residential, business or an industrial SSEG customer but these tariffs are yet to be confirmed. The tariff structure will provide financial credit to the customer when electricity is exported to the grid.\u003C/p\u003E\n\u003Cp\u003EThe Feed-In-Energy Rate is set based on these two factors:\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EThe municipality will purchase electricity from the SSEG at the same rate that it is bought from the municipality\u003C/li\u003E\n\u003Cli\u003EThe tariffs set by the municipality will be set in a simple manner for the customers. This means that an SSEG customer within a certain rate class will have a similar tariff rate as before the system was installed.\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003EClick \u003Ca href=\u0022http://www.durban.gov.za/City_Services/electricity/Tariffs/Current%20Tariffs/Tariff%20Booklet%202020-2021.pdf\u0022\u003E\u003Cstrong\u003EHERE\u003C/strong\u003E\u003C/a\u003E to read more about eThekwini Tariffs and the rolling out of the pilot program.\u003C/p\u003E\n\u003Cp\u003ERenewable energy solutions are particularly attractive in the face of load shedding, poor power quality, excessive grid power prices, or perhaps the desire to be grid independent.\u003C/p\u003E\n\u003Cp\u003EDue to the rising costs of electricity and the reduction in price for solar systems, it is becoming a financially viable option to invest solar photovoltaic (PV) solutions. Once net metering becomes standardized in SA, solar will undoubtedly become even more attractive.\u003C/p\u003E\n\u003Cp\u003EConsidering solar or back-up power? \u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Solar Enquiry\u0022\u003E\u003Cstrong\u003ECHAT\u003C/strong\u003E\u003C/a\u003E to us for expert advice on the best solutions for your application!\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.youtube.com/watch?v=gBgS-FfF8Ew\u0022\u003E\u003Cimg alt=\u0022Solar panels\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022323754b6-8df4-4938-a9e5-20f5c9271628\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/pexels-photo-371900.jpeg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Feb 2021", "terms": "Solar, Back-Up Power, Education" }, { "title": "NEW SERIES | Understanding Net Metering - Part 2", "nid": "465", "body": "\u003Cp class=\u0022text-align-justify\u0022\u003EIn our NEW series, we\u2019re unpacking net metering.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--Understanding-Net-Metering---Part-1\u0022\u003E\u003Cstrong\u003EPart One\u003C/strong\u003E\u003C/a\u003E outlines what net metering is, how it works and its benefits. \u00A0\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn Part Two, we discuss the device used in net metering... Watch this space to catch the full series!\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EThe Device used in Net Metering \u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EA four-quadrant meter is used to record energy consumption and send readings electronically to the supplier. It is used when there is an alternative source of electricity like solar, wind or biomass that is installed alongside the main grid supply.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EHow Does a Four Quadrant Meter Work?\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EFirstly, it is required to understand the different types of power and the direction it flows in. These are:\u003C/p\u003E\n\u003Col\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EActive Power (P):\u003C/strong\u003E\u003Cbr /\u003E\n\tIt is measured in Watts (W). It is the actual power you may consume and is sometimes referred to as real power.\u003Cbr /\u003E\n\t\u00A0\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022 value=\u00222\u0022\u003E\u003Cstrong\u003EReactive Power (Q):\u003C/strong\u003E\u003Cbr /\u003E\n\tIt is measured in Volt-Ampere reactive (VAR). This is power that is stored in components which are then released back again to the source through the AC cycle. Inductors are devices that do this.\u003Cbr /\u003E\n\t\u00A0\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022 value=\u00223\u0022\u003E\u003Cstrong\u003EApparent Power (S):\u003C/strong\u003E\u003Cbr /\u003E\n\tThis type of power is expressed in Volt-Ampere (VA).\u00A0 It is obtained by multiplying the RMS voltage by the RMS current. Any power supply used must have the ability to output the apparent power that is delivered to the circuit and not just the active power.\u00A0\u003C/li\u003E\n\u003C/ol\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe figure below indicates the 4 quadrants used in a net meter to measure the flow and direction of electricity. There are 4 different load situations that exist when renewable energy is generated.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Solar Enquiry\u0022\u003E\u003Cimg alt=\u00224 quadrants\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022c57109ef-4b9c-4168-92d2-806c5a6ce128\u0022 height=\u0022503\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/reactive-power-control-four-quadrants.gif\u0022 width=\u0022422\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EImporting electricity refers to when electricity is delivered from the grid to the customer. This means that there is a net inflow to the customer\u2019s site (\u002B).\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EExporting electricity occurs when it is delivered to the grid from the customer. This means that there is net outflow from the customer\u2019s site (-).\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EA Net Meters\u2019 Various Operating Quadrants\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EQuadrant I: Consumers import (\u002B) both active and reactive power.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EQuadrant II: Consumers import (\u002B) active energy but export (-) reactive energy.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EQuadrant III: Consumers export (-) both active and reactive energy.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EQuadrant IV: Consumers export (-) active energy but import (\u002B) reactive energy.\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn the next article, we wrap up the series by taking a closer look at net metering in Kwa-Zulu Natal to understand where the province currently stands on net metering.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Subscribe\u0022\u003E\u003Cstrong\u003ESUBSCRIBE\u003C/strong\u003E\u003C/a\u003E to receive these articles straight to your inbox as soon as they\u0027re published!\u00A0\u00A0\u00A0\u00A0\u003C/p\u003E\n", "created": "Feb 2021", "terms": "Solar, Back-Up Power, Education" }, { "title": "NEW SERIES | Understanding Net Metering - Part 1", "nid": "461", "body": "\u003Cp class=\u0022text-align-justify\u0022\u003EThe ever rising cost of electricity coupled with the implementation of Load Shedding in South Africa endorses the need of alternative solutions to power up your home or business... Is it possible for these alternative solutions to pay you back whilst saving you money and reducing downtime?\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn this NEW series, we introduce you to the concept of net metering. This initial article discusses what net metering is, describes how it works and outlines\u00A0its benefits.\u00A0\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EFollow the series as we unfold more about the device used in metering, and where KwaZulu-Natal currently stands with regards to incentivizing feeding back into the grid...\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EWhat is Net Metering?\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003ENet metering is a billing mechanism that is used to credit owners whose renewable energy system feeds electricity back into the national grid.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EHow does Net Metering Work?\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis occurs when a renewable energy system generates more electricity than what is used in the premises during the day. If the system has a net meter implemented, then the meter will provide a credit against the electricity that is used at night, or during periods when the electricity used exceeds the output of the solar system.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Solar Enquiry\u0022\u003E\u003Cimg alt=\u0022How net metering works\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u002259477224-7b80-4d12-ade9-6f02b68a9a43\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/hydro-net-metering-graphic-01_0.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EThe Benefits of Net Metering\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EEncourages the generation of electricity in a clean and efficient manner.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EExporting of power to the grid reduces consumer\u2019s future electricity bills, provided the local municipality has a feed-in-tariff structure in place.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EIncreases demand of solar energy, resulting in the creation of jobs for the installers, electricians and the manufacturers that build the systems.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003ENet metering also protects national electricity grid by allowing generation of electricity closer to the point of consumption.\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003EIn the next article...\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003ENow that you have an understanding of what\u00A0net metering is, in the next article we will tackle the device used for it, and its functionality...\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EWould you like to receive these articles straight to your inbox? Then \u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Subscribe\u0022\u003E\u003Cstrong\u003ESUBSCRIBE\u003C/strong\u003E\u003C/a\u003E to our informative newsletters now!\u003C/p\u003E\n", "created": "Jan 2021", "terms": "Solar, Back-Up Power, Education" }, { "title": "NEW SERIES - The Fundamentals of Circuit Breakers (part 4)", "nid": "466", "body": "\u003Cp\u003EWe\u2019re wrapping up our series on Circuit Breakers by taking a look at:\u003Cbr /\u003E\n1. The common reasons why an industrial circuit breaker might trip\u003Cbr /\u003E\n2. How to size a circuit breaker\u003C/p\u003E\n\u003Cp\u003EMissed out on previous articles in this series? Click below to catch up now!\u003Cbr /\u003E\n\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--The-Fundamentals-of-Circuit-Breakers---part-1\u0022\u003E\u003Cstrong\u003EPart One \u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0 - Circuit breaker basics and how they compare to fuses\u003C/strong\u003E\u003C/a\u003E\u003Cbr /\u003E\n\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES---The-Fundamentals-of-Circuit-Breakers-part-2\u0022\u003E\u003Cstrong\u003EPart Two\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0 - Circuit breaker components\u003C/strong\u003E\u003C/a\u003E\u003Cbr /\u003E\n\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES---The-Fundamentals-of-Circuit-Breakers-part-3\u0022\u003E\u003Cstrong\u003EPart Three\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0\u00A0 - Types of circuit breakers\u003C/strong\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cb\u003E\u003Cu\u003ECommon reasons why Circuit Breakers Trip\u003C/u\u003E\u003C/b\u003E\u003C/p\u003E\n\u003Cp\u003EA circuit breaker that trips regularly is annoying \u2013 but this actually indicates that the breaker is doing its job properly, which is to cut off the electric supply when an excessive current is detected in the circuit. Refer to \u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--The-Fundamentals-of-Circuit-Breakers---part-1\u0022\u003E\u003Cb\u003EPart One\u003C/b\u003E\u003C/a\u003E in this series to learn more about how circuit breakers work.\u003C/p\u003E\n\u003Cp\u003EWhy would an industrial circuit breaker trip in an industrial facility? Take a look at some of the most common reasons:\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E1. Short circuit fault\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EOccurs when there is contact between a neutral and live conductor, causing a current to be drawn that is much higher than the rated value\u003C/li\u003E\n\u003Cli\u003EIn this instance, the magnetic tripping mechanism is activated to clear the fault and prevent a fire or damage to equipment\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003E2. Ground fault\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EOccurs when a live conductor touches a conductive surface that is not a part of the circuit\u003C/li\u003E\n\u003Cli\u003EIf the current is extremely high, the fault must be cleared immediately by the magnetic tripping mechanism in the circuit breaker\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003E3. Electrical circuit overload\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EOccurs when the current passing through the circuit breaker exceeds its rated value for a duration longer than what\u2019s normal for the application\u003C/li\u003E\n\u003Cli\u003EIt\u2019s also possible for the breaker to trip due to an overload when the disconnection does not occur immediately (e.g. when the thermal mechanism is acting instead of the magnetic one)\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003E4. Selecting the incorrect breaker for the application\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EIt is imperative to correctly size and select a circuit breaker to ensure it matches the specific application\u003C/li\u003E\n\u003Cli\u003EFor example: If you use a Type B breaker that trips at 3\u20135 times its rated current for a motor that draws 8 times its rated current when started, it would be impossible for the circuit breaker to start because it would react as if a fault has occurred, and would disconnect the motor immediately\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cb\u003E\u003Cu\u003ESizing a Circuit Breaker\u003C/u\u003E\u003C/b\u003E\u003C/p\u003E\n\u003Cp\u003ETo properly calculate the correct circuit breaker size, numerous factors need to be considered. Examples of these include the environment temperature, load type, cable material, and so forth.\u003C/p\u003E\n\u003Cp\u003EFor the purpose of illustrating a calculation example, we are simplifying it to the basics and assuming the power factor is 1 (Resistive load).\u003C/p\u003E\n\u003Cp\u003EThe examples below can be used to size a circuit breaker for both single phase and three phase systems. Note that it has been suggested that the size of the circuit breaker should not be more than 125 % of the current flowing through the circuit.\u003C/p\u003E\n\u003Cp\u003E\u003Cb\u003E1. Single Phase Supply\u003C/b\u003E\u003C/p\u003E\n\u003Cp\u003EAssuming that it is being powered by a supply of 230V, how do we calculate the correct circuit breaker size for a load of 1840W?\u003C/p\u003E\n\u003Cp\u003ECircuit Current:\u003C/p\u003E\n\u003Cp\u003E\u003Cimg alt=\u0022Calculation 1\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022a3e6e4b2-c859-4148-a0b9-61cb3dd914f8\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Calc%201.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/p\u003E\n\u003Cp\u003EThe minimum rating of the circuit breaker should be 8 A.\u003C/p\u003E\n\u003Cp\u003ECircuit Breaker Size:\u003C/p\u003E\n\u003Cp\u003E\u003Cimg alt=\u0022Calculation 2\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00228aeddd66-21a0-4b22-8abd-bd5bf39679dc\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Calc%202.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/p\u003E\n\u003Cp\u003EThe recommended size of the circuit breaker is 10A.\u003C/p\u003E\n\u003Cp\u003E\u003Cb\u003E2. Three Phase Supply\u003C/b\u003E\u003C/p\u003E\n\u003Cp\u003EWhat is the size of the circuit breaker that should be used for a residential 6.5kW, three phase 480V load?\u003C/p\u003E\n\u003Cp\u003ECircuit Current:\u003C/p\u003E\n\u003Cp\u003E\u003Cimg alt=\u0022Calculation 3\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022f5257432-8124-4b1b-9f98-1c99b0401e33\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Calc%203.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/p\u003E\n\u003Cp\u003ECircuit Breaker Size:\u003C/p\u003E\n\u003Cp\u003E\u003Cimg alt=\u0022Calculation 4\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022fabd1ebd-85c3-453e-b269-f692d381e56b\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Calc%204.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/p\u003E\n\u003Cp\u003EThe recommended size of the circuit breaker that should be used is 10A.\u003C/p\u003E\n\u003Cp\u003ESizing a three phase system will vary depending on the type of load i.e., light, motor, inductive or capacitive. Click \u003Ca href=\u0022https://hto.power.schneider-electric.com/cbt/app/index.html?code=a12ef77f-8e48-4398-82e1-23bbd9b610d2\u0026amp;client_id=cbt#/Dashboard\u0022\u003E\u003Cstrong\u003EHERE\u003C/strong\u003E\u003C/a\u003E for more circuit breaker selection tools.\u003C/p\u003E\n\u003Cp\u003ECircuit breakers is a vast subject, and we\u0027ve just scratched the surface. Have a question about breakers? Or perhaps you need advice on the ranges available?\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Electrical Enquiry\u0022\u003E\u003Cstrong\u003E CHAT\u003C/strong\u003E\u003C/a\u003E to us. We\u2019re happy to help!\u003C/p\u003E\n\u003Cp\u003EWant to receive these articles straight to your inbox? \u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Subscribe\u0022\u003E\u003Cstrong\u003ESUBSCRIBE \u003C/strong\u003E\u003C/a\u003Eto join our mailing list now!\u003C/p\u003E\n", "created": "Feb 2021", "terms": "Electrical, Education" }, { "title": "NEW SERIES - The Fundamentals of Circuit Breakers (part 3)", "nid": "464", "body": "\u003Cp class=\u0022text-align-justify\u0022\u003EThe next article in our series on \u003Cstrong\u003ECircuit Breakers\u003C/strong\u003E discusses a few common types of breakers.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EMissed out on the first two articles? Follow the links below to catch up on parts one and two in the series:\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES--The-Fundamentals-of-Circuit-Breakers---part-1\u0022\u003E\u003Cstrong\u003EPart One\u003C/strong\u003E\u003Cbr /\u003E\n- Gain an understanding of what circuit breakers are, how they work and how they compare to fuses.\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news.php?type=articles\u0026amp;name=NEW-SERIES---The-Fundamentals-of-Circuit-Breakers-part-2\u0022\u003E\u003Cstrong\u003EPart Two\u003C/strong\u003E\u003Cbr /\u003E\n-\u00A0Learn about what circuit breakers typically comprise of.\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn the third article of the series, we give you an overview of miniature, molded case, residual current and air circuit breakers\u2026.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003ETypes of Circuit Breakers\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E1. Miniature Circuit Breakers \u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EA Miniature Circuit Breaker (MCB) serves the purpose of both switching and preventing damage to an electrical circuit when excess current flows. It is an electromechanical device that protects the electrical wires and load from overcurrent to prevent damage or fire.\u00A0 MCB\u2019s are used in domestic applications because of the overload and short circuit protection they offer, as well as the ease with which they can be reset.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E2. Molded Case Circuit Breakers\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EA Molded Case Circuit Breaker (MCCB) is used when the load current exceeds the limit of a miniature circuit breaker. MCCBs are used in industrial applications because of their wide current ratings and higher breaking capacity. They offer adequate protection when an application requires discrimination, adjustable overload settings or earth fault protection.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe Table below highlights a few differences between MCBs and MCCBs:\u00A0\u003C/p\u003E\n\u003Ctable border=\u00223\u0022 cellpadding=\u00221\u0022 cellspacing=\u00221\u0022 style=\u0022width: 650px;\u0022\u003E\n\u003Cthead\u003E\n\u003Ctr\u003E\n\u003Cth scope=\u0022col\u0022 style=\u0022width: 315px;\u0022\u003EMCB\u003C/th\u003E\n\u003Cth scope=\u0022col\u0022 style=\u0022width: 322px;\u0022\u003EMCCB\u003C/th\u003E\n\u003C/tr\u003E\n\u003C/thead\u003E\n\u003Ctbody\u003E\n\u003Ctr\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 315px;\u0022\u003EMaximum rated current of 125A\u003C/td\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 322px;\u0022\u003EMaximum rated current of 1600A\u003C/td\u003E\n\u003C/tr\u003E\n\u003Ctr\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 315px;\u0022\u003EMaximum interrupted current rating is less than 10kA\u003C/td\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 322px;\u0022\u003EMaximum interrupted current rating is in the range of 10 \u2013 85 kA\u003C/td\u003E\n\u003C/tr\u003E\n\u003Ctr\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 315px;\u0022\u003EUsed in applications that require a low breaking capacity\u003C/td\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 322px;\u0022\u003EUsed in applications that require either low or high breaking capacity\u003C/td\u003E\n\u003C/tr\u003E\n\u003Ctr\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 315px;\u0022\u003ETrip characteristics are not adjustable\u003C/td\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 322px;\u0022\u003ETrip characteristics can be fixed or adjustable depending on the application\u003C/td\u003E\n\u003C/tr\u003E\n\u003Ctr\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 315px;\u0022\u003EProvides protection for electrical wiring and equipment\u003C/td\u003E\n\u003Ctd class=\u0022text-align-justify\u0022 style=\u0022width: 322px;\u0022\u003EProvides protection for electrical wiring and equipment\u003C/td\u003E\n\u003C/tr\u003E\n\u003C/tbody\u003E\n\u003C/table\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E3. Residual Current Circuit Breakers\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EA Residual Current Circuit Breaker (RCCB) is a device that disconnects the electrical circuit in the event of leakage current flowing through a living being, or when the current is not balanced between the phase and neutral conductor. It detects and trips the circuit in the event of leakage current, preventing shock caused by direct contact. The device is used in series with an MCB and is a necessity for shock protection.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E4. Air Circuit Breakers\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EAn Air Circuit Breaker (ACB) is electronic equipment that is used for the protection of electric circuits from short circuits or overcurrent. ACBs are used in the switching mechanism and protection of the electrical system. Standard ACB ratings typically range from 400A to 1600A. Some of the higher class ACBs typically have a maximum current rating of 5000A.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Electrical Enquiry\u0022\u003E\u003Cimg alt=\u0022Air Circuit Breaker\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u002238e08447-0eb2-4fcb-bf09-51266ab9d1ef\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Large-Air-Circuit-Breaker-Principle%20-%20blog.jpg\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EFunctions: \u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EIt opens or closes a circuit automatically or manually.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EOpens circuits automatically when a fault takes place such as over current, short circuit, earth fault, over frequency, reverse power, etc.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EIt dampens the arcing in case of overloading\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003ETypes:\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EPlain Break type ACB\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EMagnetic Blowout Type ACB\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EAir Chute ACB\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EAir Blast Circuit Breaker\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Cu\u003ELearn more about Circuit breaker technology\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EWhat to learn more?\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003ETake an in depth look at circuit breakers with a special emphasis on the Eaton\u0027s most technologically advanced circuit breaker, the Power Defence molded case circuit breaker...\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EClick \u003Ca href=\u0022https://www.youtube.com/watch?v=ZBPV2r7VTgw\u0022\u003E\u003Cstrong\u003EHERE\u003C/strong\u003E\u003C/a\u003E to watch the video now!\u003C/p\u003E\n", "created": "Feb 2021", "terms": "Electrical, Education" } ]