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[ { "title": "LEARN | Cascading of Circuit Breakers pt 1", "nid": "552", "body": "\u003Cp class=\u0022text-align-justify\u0022\u003EAre you planning on renewing or adding \u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/index.php\u0022\u003E\u003Cstrong\u003Ecircuit breakers\u003C/strong\u003E\u003C/a\u003E to your current electrical installation? Is it possible to reduce the cost of purchasing these circuit breakers whilst still being adequately protected?\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis NEW series introduces you to the technique of how circuit breakers are cascaded in a system.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn Part 1 we give an explanation of what cascading is, its advantages, and the conditions required to implement cascading. In \u003Ca href=\u0022https://www.magnet.co.za/news.html?type=articles\u0026amp;name=LEARN--Cascading-of-Circuit-Breakers-pt-2\u0022\u003E\u003Cstrong\u003EPart 2\u003C/strong\u003E\u003C/a\u003E, we touch\u00A0on the topic of selectivity, by giving an overview on how it can be enhanced in your system by the implementation of cascading circuit breakers.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/news.php?type=articles\u0026amp;name=PRODUCT-NEWS--Schneider039s-Compact-NSXm-MCCB\u0022\u003E\u003Cimg alt=\u0022Schneider NSX\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00224b0f15ae-eb25-419f-afe3-3ef9b78a7b99\u0022 height=\u0022249\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/35d07cecbfa8ef82d3db4c1d852a65c7.jpg\u0022 width=\u0022330\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EWhat is Cascading of Circuit Breakers?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe cascading of circuit breakers is a \u201Cback-up\u201D protection system which is implemented to allow for the installation of circuit breakers that are not able to handle the full capacity of the prospective short-circuit current of a fault at the point of installation.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EA requirement in cascading a system is to make sure that these circuit breakers are backed up a downstream/upstream fully rated circuit-breaker in a predetermined and tested coordination.\u00A0 It is vital to identify the fault level of a circuit breaker at a given point to allow for the installation of lower-rated circuit breakers downstream. This will ultimately allow for a reduction in costs.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EWhat does Cascading of Circuit Breakers mean? \u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis is the term used when you have a panel with a high fault level (20kA) for example. The installation will consist of two circuit breakers in series. The main breaker located at the panel will be rated at fault level, whilst the breakers below can be of the lowest kA rating offered. You can save money without decreasing the safety level. The only problem with this system is when a fault occurs, then the upstream breaker, or both breakers, open to clear the fault.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EWhat are the Advantages of Cascading Circuit Breakers?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EWhen \u003Cstrong\u003E\u003Ca href=\u0022https://go.schneider-electric.com/lp/178-GYD-668/ZA_202110_Schneider-Learning-Series-Webinar-Current-Limitation_MI-EF-LP.html\u0022\u003Ecurrent limitation\u003C/a\u003E\u003C/strong\u003E is implemented, it will benefit all downstream circuits that are controlled by the current-limiting circuit breaker concerned which, in most cases, is the main supply circuit breaker.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis principle is not restrictive, which means that current limiting circuit breakers can be installed at any point of the system where the downstream circuits could possibly be inadequately rated.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EThis results in:\u003C/strong\u003E\u003C/p\u003E\n\u003Col\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003ESimplified short-circuit calculations.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003ESimplification which will result in a wider choice of downstream switchgear and appliances.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003EThe use of cascading circuit breakers will allow for the installation of lighter-duty switchgear and appliances which will ultimately reduce the cost.\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003ELight-duty equipment that is installed will need less space as opposed to heavy-duty equipment.\u003C/li\u003E\n\u003C/ol\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EWhat are the Conditions Required for the Implementation of Cascading Circuit Breakers? \u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe implementation of the cascading technique should be allowed, provided that the amount of energy allowed through by the limiting circuit breaker is less than the withstand energy of all downstream circuit breakers.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EHow do you implement a cascading system?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EWhen using a manufacturer cascading chart, you can only use a cascading system by using circuit breakers from the same manufacturer. When implementing the cascading of circuit breakers, it is important to follow the guidelines that are set in SANS 10142-1:2020. An example of a manufacturers\u2019 cascading chart can be seen below.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Schneider Enquiry\u0022\u003E\u003Cimg alt=\u0022Example of cascading chart\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022b060ad9d-b785-4996-acde-d4a61705d8c3\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Example%20of%20cascading%20chart.png\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003EIn the second instalment of this series, we touch on the topic of selectivity by giving an overview on how it can be enhanced in your system by the implementation of cascading circuit breakers.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EResources:\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E1.\u00A0\u003Ca href=\u0022https://www.magnetgroup.co.za/news-letter.html\u0022\u003ESUBSCRIBE\u003C/a\u003E\u003C/strong\u003E to our newsletters to receive this informative content straight to your inbox\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E2. \u003Ca href=\u0022https://download.schneider-electric.com/files?p_Doc_Ref=LVPED318033EN\u0022\u003EDOWNLOAD\u003C/a\u003E \u003C/strong\u003Ea selectivity, cascading and co-ordination guide\u003Cstrong\u003E \u00A0\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E3. \u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Circuit%20Breaker%20Enquiry\u0022\u003ECHAT\u003C/a\u003E \u003C/strong\u003Eto our experts for assistance with your circuit breakers\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003E\u003Cu\u003ESources:\u003C/u\u003E\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.electrical-installation.org/enwiki/Coordination_between_circuit-breakers\u0022\u003Ehttps://www.electrical-installation.org/enwiki/Coordination_between_circuit-breakers\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.se.com/in/en/faqs/FA240587/#:~:text=Cascading%20is%20the%20use%20of,barrier%20against%20short%2Dcircuit%20currents\u0022\u003Ehttps://www.se.com/in/en/faqs/FA240587/#:~:text=Cascading%20is%20the%20use%20of,barrier%20against%20short%2Dcircuit%20currents\u003C/a\u003E.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.linkedin.com/pulse/everything-you-need-know-cascading-boris-fuchs/\u0022\u003Ehttps://www.linkedin.com/pulse/everything-you-need-know-cascading-boris-fuchs/\u003C/a\u003E\u003C/p\u003E\n", "created": "Oct 2021", "terms": "Electrical, Education, Schneider" }, { "title": "PRODUCT NEWS | Eaton\u0026#039;s PKE electronic motor protection circuit breaker", "nid": "556", "body": "\u003Cp\u003E\u003Ca href=\u0022https://shop.magnetgroup.co.za/\u0022\u003E\u003Cimg alt=\u0022Eaton CB\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00228c1e2f41-8a43-442d-980d-5728dec34cfc\u0022 height=\u0022257\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Picture1_5.png\u0022 width=\u0022331\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThanks to their special features, the Eaton Moeller series motor-protective circuit breakers with electronic overload protection complement the PKZ range and offer a good alternative to MCBs with bimetallic strips. Due to the compact and modular design featuring plug-in trip blocks, they offer maximum flexibility in the current range up to 65 A. By adding the PKE-XTUCP trip blocks, you can quickly turn a PKE motor-protective circuit breaker into a PKE circuit breaker for system and cable protection.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ECore features\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EHand-operated motor-protective circuit breaker in accordance with IEC/EN 60947-4-1, VDE 0660 Part 102\u003C/li\u003E\n\u003Cli\u003ERotary handle with ON \u0026amp; OFF switch-position indicator\u003C/li\u003E\n\u003Cli\u003EPush-in trip block up to 65 A with visible isolating distance\u003C/li\u003E\n\u003Cli\u003EIf used in conjunction with the appropriate accessories, the circuit breaker can be turned into main switch or emergency-stop switch in accordance with EN 60204 and/or VDE 0113\u003C/li\u003E\n\u003Cli\u003EIsolating characteristics in accordance with IEC/EN 60947-3\u003C/li\u003E\n\u003Cli\u003EUL/CSA (including Types E and F) approvals for the North American market\u003C/li\u003E\n\u003Cli\u003ESmartWire-DT integration\u003C/li\u003E\n\u003Cli\u003EShort-circuit proof up to 100 kA (400 V) up to 32 A, 50 kA (400 V) up to 65 A\u003C/li\u003E\n\u003Cli\u003ECircuit breaker width: 45 mm up to 36 A / 55 mm up to 65 A\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EConnections with just one clever \u201Cclick\u201D \u2013 the PKE electronic motor-protective circuit breaker with Push-in technology\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe Push-in terminals enable control-panel wiring with just one simple click. This tool-free connection technology makes wiring even faster, safer and more efficient. The PKE motor-protective circuit breakers with electronic wide-range overload protection and plug-in trip blocks offer a viable alternative to bi-metallic solutions in the current range up to 65 A.\u003C/p\u003E\n\u003Cp\u003EWe are Premium Distributors of the Eaton range of products and solutions\u2026\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Eaton%20Enquiry\u0022\u003ECHAT\u003C/a\u003E\u003C/strong\u003E to us about an Eaton solution for your facility!\u003C/p\u003E\n", "created": "Oct 2021", "terms": "Electrical, Products, Eaton, General" }, { "title": "LEARN | Cascading of Circuit Breakers pt 2", "nid": "555", "body": "\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/index.php\u0022\u003E\u003Cimg alt=\u0022Circuit breakers\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022ceaff044-55aa-4f76-88a8-1a7bc72ae240\u0022 height=\u0022179\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Newsletter.png\u0022 width=\u0022318\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn our latest series, we\u2019re discussing the cascading of circuit breakers.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIn \u003Ca href=\u0022https://www.magnet.co.za/solutions-electrical/news.html?type=article\u0026amp;name=LEARN--Cascading-of-Circuit-Breakers-pt-1\u0022\u003E\u003Cstrong\u003EPart 1\u003C/strong\u003E\u003C/a\u003E, we give an explanation of what cascading is, its advantages, and the conditions required to implement cascading.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis second and final instalment in the series touches on the topic of selectivity, by giving an overview on how it can be enhanced in your system by the implementation of cascading circuit breakers.\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Ca href=\u0022https://shop.magnetgroup.co.za/\u0022\u003E\u003Cimg alt=\u0022Typical cascading\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022202b437f-6389-4772-8c02-7695aa3b5e4e\u0022 height=\u0022329\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Typical%20Cascading%20Distribution%20Panel.png\u0022 width=\u0022537\u0022 /\u003E\u003C/a\u003E\n\u003Cfigcaption\u003ETypical Cascading Distribution Panel\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat does Cascading with Enhanced Discrimination of Circuit Breakers mean?\u003C/strong\u003E\u003C/p\u003E\n\u003Col\u003E\n\u003Cli\u003EIt is the selection of Circuit Breakers to guarantee the Circuit Breaker closest to the fault is the ONLY Breaker to isolate a fault.\u003C/li\u003E\n\u003Cli\u003EThis selection is done by the manufacturers\u2019 cascading with enhanced discrimination charts.\u003C/li\u003E\n\u003Cli\u003EThe MAIN Circuit Breaker in the panel must be double the Amperage of the lower breakers.\u003C/li\u003E\n\u003Cli\u003EThe Circuit Breakers below can be of a much LOWER kA rating to have the cascading effect.\u003C/li\u003E\n\u003Cli\u003EThese systems can be designed and implemented for industrial and utility applications.\u003C/li\u003E\n\u003C/ol\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/index.php\u0022\u003E\u003Cimg alt=\u0022Enhanced discrimination\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022e9c6da14-cfda-4254-80eb-20e23e629387\u0022 height=\u0022368\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Schneider%20-%20Cascading%20with%20enhanced%20discrimination%20chart.png\u0022 width=\u0022682\u0022 /\u003E\u003C/a\u003E\n\u003Cfigcaption\u003ECascading with Enhanced Discrimination Chart (Source: Schneider Electric)\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Cimg alt=\u0022Curves\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022fa84e628-1cff-4f42-873c-df40e5a2cdba\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Curves.png\u0022 /\u003E\n\u003Cfigcaption\u003ECurves of Cascading Breakers vs. Curves of Cascading with Enhanced Discrimination of Breakers\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is Selectivity?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003ESelectivity is performed with the use of overcurrent and earth fault protection devices. If a fault condition occurs at any point of the installation, it should be cleared by the protective device that is located immediately upstream of the fault, whilst the other protective devices remain unaffected. Refer to Figure 1 below.\u00A0\u003C/p\u003E\n\u003Cp\u003ESelectivity is a requirement for an installation that supplies a critical load, where a fault on one circuit should not cause an interruption on the supply of other circuits. To achieve selectivity, it is vital that the maximum short-circuit current at a point of the installation be less than the selectivity limit of the circuit breakers that supply that point of the installation.\u003C/p\u003E\n\u003Cp\u003ESelectivity is required to be checked for all circuits that are supplied by one source and for the following faults:\u003C/p\u003E\n\u003Col\u003E\n\u003Cli\u003EOverload Faults\u003C/li\u003E\n\u003Cli\u003EShort-Circuit Faults\u003C/li\u003E\n\u003Cli\u003EEarth Faults\u003C/li\u003E\n\u003C/ol\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is Current Based Selectivity?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003ECurrent based selectivity is performed by allowing successive tripping thresholds, at stepped levels from downstream circuits that have a lower setting, towards the source which has a higher setting. Refer to Figures 2 to 4 below.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Electrical Enquiry\u0022\u003E\u003Cimg alt=\u0022Figures\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022be7cd6d6-c865-43f4-a23c-c1d9488e2bfb\u0022 height=\u0022488\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Figures%201%20-%204.png\u0022 width=\u0022699\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EWhat is Time Based Selectivity?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003ETime based selectivity is obtained by adjusting the time-delayed tripping units so that the relays downstream have the shortest operating times with progressively longer delays towards the source. As seen in the picture below, the upstream circuit breaker A is delayed sufficiently to ensure total selectivity with circuit breaker B.\u003C/p\u003E\n\u003Cp\u003E\u003Cfigure role=\u0022group\u0022 class=\u0022caption caption-img align-center\u0022\u003E\n\u003Cimg alt=\u0022Time based selectivity\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u002287875529-d44c-48a8-960e-ffd6e2fd0233\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Time%20based%20selectivity.png\u0022 /\u003E\n\u003Cfigcaption\u003EFig 5: Time Based Selectivity between Breakers A and B\u003C/figcaption\u003E\n\u003C/figure\u003E\n\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/index.php\u0022\u003E\u003Cimg alt=\u0022Example of selectivity\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00223787a47d-a50e-405d-a77c-f69aa505c9cd\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Selectivity%20example.png\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003EThe above diagram is a practical example of selectivity using circuit breakers.\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EHow is Selectivity Enhanced by Cascading?\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003ECascading between two circuit breakers is performed by using the tripping of the upstream circuit breaker A, to assist circuit breaker B to break the current.\u003C/p\u003E\n\u003Cp\u003EThe principle for this is as follows:\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EIn the event of the downstream circuit breaker B seeing a very high magnitude short-circuit current. The tripping action will be very fast (\u0026lt;1 ms) which will result in the current being limited.\u003C/li\u003E\n\u003Cli\u003EThe circuit breaker (A), which is located upstream, will see a limited short-circuit current when compared to its breaking capability, but this current will induce a repulsion of the contacts. It will subsequently result in the arcing voltage increasing the current limitation. This arc energy will not be high enough to induce the tripping of the circuit breaker. Thus, circuit breaker A will assist circuit breaker B to trip, without tripping itself. The selectivity limit can be greater than the rated breaking capacity of circuit breaker B, thus resulting in the selectivity becoming total with a reduced cost of the devices.\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EResources:\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003E1. Do you enjoy reading our articles? \u003Cstrong\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/news-letter.html\u0022\u003ESUBSCRIBE\u003C/a\u003E\u003C/strong\u003E to get these straight to your inbox!\u003C/p\u003E\n\u003Cp\u003E2. \u003Cstrong\u003E\u003Ca href=\u0022https://download.schneider-electric.com/files?p_Doc_Ref=LVPED318033EN\u0022\u003EDOWNLOAD\u003C/a\u003E\u003C/strong\u003E a selectivity, cascading and co-ordination guide\u00A0\u003C/p\u003E\n\u003Cp\u003E3. Need advice on a product? \u003Cstrong\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Circuit%20Breaker%20Enquiry\u0022\u003ECHAT\u003C/a\u003E\u003C/strong\u003E to our team for more on circuit breakers.\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ESources:\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.electrical-installation.org/enwiki/Coordination_between_circuit-breakers\u0022\u003Ehttps://www.electrical-installation.org/enwiki/Coordination_between_circuit-breakers\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.se.com/in/en/faqs/FA240587/#:~:text=Cascading%20is%20the%20use%20of,barrier%20against%20short%2Dcircuit%20currents\u0022\u003Ehttps://www.se.com/in/en/faqs/FA240587/#:~:text=Cascading%20is%20the%20use%20of,barrier%20against%20short%2Dcircuit%20currents\u003C/a\u003E.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022https://www.linkedin.com/pulse/everything-you-need-know-cascading-boris-fuchs/\u0022\u003Ehttps://www.linkedin.com/pulse/everything-you-need-know-cascading-boris-fuchs/\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Oct 2021", "terms": "Electrical, Education, Schneider" }, { "title": "READ | Why thermal imaging is good for your business", "nid": "557", "body": "\u003Cp\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/solutions-electrical/index.php\u0022\u003E\u003Cimg alt=\u0022fluke thermal imaging\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022f56d80c3-3907-474c-a280-5a4281c8a5d5\u0022 height=\u0022265\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Fluke%20image.png\u0022 width=\u0022473\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EDue to technology advancements, thermal imaging has become more affordable, easier to use and more broadly deployed in a variety of industrial and commercial markets.\u003C/strong\u003E That is good news if you\u2019re a contractor looking to add thermal imaging to your range of services, because most customers have likely heard of it.\u003C/p\u003E\n\u003Cp\u003EThermal cameras produce thermal (heat) pictures of equipment, allowing your customers to see nearly immediate benefits from such a service. In one pass through a facility, you can usually find at least one component displaying indications the equipment may soon fail. \u003Cstrong\u003EThis makes for a powerful demonstration and an easy business builder.\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EYour advantage as a contractor is having broad experience with many types of equipment and failure scenarios\u2014just like any other troubleshooting situation, the person behind the thermal camera needs to draw on experience to help analyse the readings. \u201CIf this part of an electrical panel is hot, should I investigate the connections or the load?\u201D\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EIn addition, if you\u2019re already contracted with a company for regular maintenance and troubleshooting, adding thermography makes sense.\u003C/strong\u003E You already know the facility and which units are critical to performance. You can simply add thermal inspections to your regular visits and have the tool available during troubleshooting calls. Plus, if you are an electrician, you\u2019re uniquely qualified to work in live voltage situations. Specialty thermographers often are not qualified and require assistance from an on-site electrician, technician or engineer.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EBefore thermal imaging becomes part of your services, explore courses from a reputable trainer.\u003C/strong\u003E Not only will having a credential to point out to prospective clients be beneficial, you will learn the theoretical and practical tools needed to get the best results out of a thermal camera.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EIndeed, training is an important consideration when starting any new initiative.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ELook to be trained on:\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EHow to use the thermal camera\u003C/li\u003E\n\u003Cli\u003EApplications with the greatest return on investment\u003C/li\u003E\n\u003Cli\u003EHow to properly perform inspections\u003C/li\u003E\n\u003Cli\u003EHow to interpret results and generate meaningful and actionable reports\u003C/li\u003E\n\u003Cli\u003EHow to safely conduct thermography inspections in an industrial work environment\u00A0\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cimg alt=\u0022Fluke fig 1\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u00227255892f-e888-4252-a634-90c356326324\u0022 height=\u0022181\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Figure%201_0.JPG\u0022 width=\u0022588\u0022 class=\u0022align-center\u0022 /\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ETypical applications\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EElectrical contractors typically use thermal cameras for preventive maintenance and troubleshooting, and sometimes during installation.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EFor preventive maintenance, the contractor takes thermal images of key units (panels, drives, motors, etc.) at least once a year if not more often, and compares those images with each visit.\u003C/strong\u003E Hot spots that weren\u2019t there last time indicate problems in the making to investigate before they cause failure. Software on the thermal imager helps you align your images time after time, so that you\u2019re making consistent comparisons.\u003C/p\u003E\n\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Fluke Enquiry\u0022\u003E\u003Cimg alt=\u0022Fluke fig 2\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u002291e6175d-2725-4b8b-9545-70884e88efda\u0022 height=\u0022192\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/Figure%202.JPG\u0022 width=\u0022647\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003ESome additional things to consider:\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EMost equipment\u2019s failure mechanisms involve a significant rise in operating temperature long before catastrophic failure occurs.\u003C/li\u003E\n\u003Cli\u003EThermal images are best taken while equipment is operational. No shutdowns needed.\u003C/li\u003E\n\u003Cli\u003EThermal images are taken at a safe distance. Minimal safety risk (except for live voltage\u2014that still requires full electrical safety precautions).\u003C/li\u003E\n\u003Cli\u003EThermal images can access components and units not otherwise measurable, such as ceiling runs.\u003C/li\u003E\n\u003Cli\u003EThermal measurements help detect imminent failures in nearly all types of equipment, from electrical to mechanical, process, electronic, and so on.\u003C/li\u003E\n\u003Cli\u003EBecause thermal inspections are fast, they can cover more ground and find problems in areas that would typically be ignored.\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003EFor troubleshooting, taking a thermal image of a malfunctioning unit can often identify the source of the problem\u003C/strong\u003E\u2014electrical hotspots can tell you which phase or connectors to check, motor hotspots can narrow it down to bearings, and so forth. Then, after repairs, follow up with another thermal image and verify that the component is no longer overheating\u2014or that something else isn\u2019t now overheating, instead.\u003C/p\u003E\n\u003Cp\u003E\u003Cstrong\u003EHere\u2019s a summary of principle applications.\u003C/strong\u003E\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli\u003EElectrical power distribution systems: Three-phase systems, distribution panels, fuses, wiring and connections, substations, electrical vaults, etc.\u003C/li\u003E\n\u003Cli\u003EElectro-mechanical equipment: Motors, pumps, fans, compressors, bearings, windings, gear boxes, and conveyors\u003C/li\u003E\n\u003Cli\u003EProcess instrumentation: Process control equipment, pipes, valves, steam traps and tanks/vessels\u003C/li\u003E\n\u003Cli\u003EFacility maintenance: HVAC systems, buildings, roofs, insulation\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp\u003E\u003Cstrong\u003ESummary\u003C/strong\u003E\u003C/p\u003E\n\u003Cp\u003EReally, there\u2019s nothing holding you back. Contractors can readily purchase affordable thermal cameras, quickly train on the basics, and immediately start using the tool to improve their client services. The more you use it, the more skilled you become.\u003C/p\u003E\n\u003Cp\u003ENeed advice? \u003Cstrong\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Fluke%20Enquiry\u0022\u003ECHAT\u003C/a\u003E\u003C/strong\u003E to us about the FLUKE range of thermal imaging solutions.\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Oct 2021", "terms": "Electrical, Education, Fluke, General" }, { "title": "PRODUCT NEWS | Klingspor\u0026#039;s A 630 N Supra Cutting-Off Wheel", "nid": "554", "body": "\u003Cp\u003E\u003Ca href=\u0022mailto:hello@magnetgroup.co.za?subject=Klingspor Enquiry\u0022\u003E\u003Cimg alt=\u0022Klingspor supra a 630 n\u0022 data-entity-type=\u0022file\u0022 data-entity-uuid=\u0022a87e8869-01a2-47b3-88b6-3896fa8eb4cf\u0022 height=\u0022296\u0022 src=\u0022/cms/drupal8-magnetgroup/sites/default/files/inline-images/kt_a630n.jpg\u0022 width=\u0022296\u0022 class=\u0022align-center\u0022 /\u003E\u003C/a\u003E\u003C/p\u003E\n\u003Cp\u003EHave YOU seen Klingspor\u0027s Kronenflex\u2122\u00A0 A 630 N Supra in action?\u00A0\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe\u00A0Kronenflex\u2122 large cutting-off wheel\u00A0A 630 N Supra allows any craftsman to achieve professional results. This abrasive lives up to the highest standards and is used primarily on:\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Esteel\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Estainless steel\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Ealuminium\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Ecastings\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe product delivers its best results when used on these materials. This cutting-off wheel proves particularly useful on\u00A0metal\u00A0\u2013 especially during maintenance and repairs, in metal construction and work in fabrication shops. Klingspor offers this large cutting-off wheel in a variety of versions to ensure suitability for all types of possible applications. This also holds true for the A 630 N Supra. This makes the product equally ideal for skilled professional users and keen \u2018do-it-yourself-ers\u2019.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EKronenflex\u2122 large cutting-off wheel with unrivalled performance\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThis\u00A0Kronenflex\u2122 large cutting-off wheel\u00A0of the Supra performance class stands out with a host of advantages. They include:\u003C/p\u003E\n\u003Cul\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Eexceptional hardness\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Ehigh aggressiveness\u003C/li\u003E\n\u003Cli class=\u0022text-align-justify\u0022\u003Elong service life\u003C/li\u003E\n\u003C/ul\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EThe product owes its exceptional qualities to the use of Aluminium Oxide grain. This tried-and-tested grain is made synthetically and demonstrates consistent performance and a high removal rate during practical use. The bonding agent selected by Klingspor is a premium synthetic resin that forms an excellent blend with Aluminium Oxide. Both materials are matched in such a way that they show uniform wear characteristics.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003EVersatile Cutting-off\u003C/strong\u003E\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003EKlingspor attaches great importance to ensuring that their large cutting-off wheel A 630 N Supra can be used with chop saw machines. These include chop saws commonly used in trade and industry. The wheel delivers the same excellent performance\u00A0chop saws\u00A0with a capacity of no more than 3 kW. This cutting-off wheel is therefore suited for a vast range of applications.\u003C/p\u003E\n\u003Cp class=\u0022text-align-justify\u0022\u003E\u003Cstrong\u003E\u003Ca href=\u0022https://www.magnetgroup.co.za/download/m-a630n-supra.pdf\u0022\u003EDOWNLOAD\u003C/a\u003E\u003C/strong\u003E the product brochure to learn more!\u003C/p\u003E\n\u003Cp\u003E\u00A0\u003C/p\u003E\n", "created": "Oct 2021", "terms": "Electrical, Products, Klingspor" } ]