{"id":1394,"date":"2021-08-05T03:57:26","date_gmt":"2021-08-05T03:57:26","guid":{"rendered":"https:\/\/www.wikitechy.com\/interview-questions\/?p=1394"},"modified":"2021-09-08T05:23:56","modified_gmt":"2021-09-08T05:23:56","slug":"for-415v-3phase-22kw-rating-of-motor-how-to-calculate-mccb-rating","status":"publish","type":"post","link":"https:\/\/www.wikitechy.com\/interview-questions\/electrical-engineering\/for-415v-3phase-22kw-rating-of-motor-how-to-calculate-mccb-rating\/","title":{"rendered":"For 415v, 3phase, 22kw rating of motor how to calculate MCCB rating ?"},"content":{"rendered":"
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Convert KW to HP (KW\/0.75), multiply it by 1.5 gives you the rated current. Multiply it by 1.5 for breaker value.<\/span><\/p>\n<\/div>\n<\/div>\n

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Here we provide\u00a0coordination chart<\/a>\u00a0link for required rating and model of MCCB.<\/p>\n<\/div>\n<\/div>\n

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What is MCCB ?<\/h2>\n<\/div>\n<\/div>\n
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    \n
  • Molded case circuit breakers are a type of electrical protection device that is generally used for a wide range of voltages, and frequencies of both 50 Hz and 60 Hz.<\/li>\n
  • The main distinctions between molded-case and miniature circuit breaker are that the MCCB can have current ratings of up to 2,500 amperes, and its trip settings are usually adjustable.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
    \n
    \n

    MCCB has three main functions:<\/h2>\n<\/div>\n<\/div>\n
    \n

    Protection against overload<\/h2>\n<\/div>\n
    \n
    \n
      \n
    • Currents above the rated value that last longer than what is normal for the application.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
      \n

      Protection against electrical faults<\/h2>\n<\/div>\n
      \n
      \n
        \n
      • During a fault such as a short circuit or line fault, there are very high currents that must be interrupted directly.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
        \n

        Switching a circuit on and off<\/h2>\n<\/div>\n
        \n
        \n
          \n
        • This is a less common function of circuit breakers, but they can be used for that purpose if there isn\u2019t a suitable manual switch.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

          Answer : Convert KW to HP (KW\/0.75)…<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9847],"tags":[10249,10250,195,10251,10252,491,360,9864,203,214,363,209,5940,205,222,10253,10254,196,212,2120,710,10255,10006,10263,10256,10264,10257,10258,10259,10260,10261,10262,207,711,4605,366,361,8977,367,483,206,200,1746,197,364,285,15850],"class_list":["post-1394","post","type-post","status-publish","format-standard","hentry","category-electrical-engineering","tag-3-phase-motor-current-calculation-formula","tag-3-phase-motor-current-chart","tag-accenture-interview-questions-and-answers","tag-advantages-of-mccb","tag-application-of-mccb","tag-applied-materials-interview-questions-and-answers","tag-atos-interview-questions-and-answers","tag-aveva-soft-interview-questions-and-answers","tag-capgemini-interview-questions-and-answers","tag-cgi-group-inc-interview-questions-and-answers","tag-ciena-corporation-interview-questions-and-answers","tag-collabera-technologies-interview-questions-and-answers","tag-csg-international-interview-questions-and-answers","tag-dell-international-services-india-pvt-ltd-interview-questions-and-answers","tag-flipkart-interview-questions-and-answers","tag-how-to-calculate-contactor-rating-for-motor","tag-how-to-select-mcb-for-3-phase-motor","tag-ibm-interview-questions-and-answers","tag-indecomm-global-services-interview-questions-and-answers","tag-larsen-toubro-interview-questions-and-answers","tag-mavenir-interview-questions-and-answers","tag-mcb-rating-calculation-formula","tag-mccb","tag-mccb-breaker","tag-mccb-circuit-diagram","tag-mccb-electrical","tag-mccb-full-form","tag-mccb-rating-calculation-software","tag-mccb-ratings","tag-mccb-selection-chart-for-motors","tag-mccb-selection-formula","tag-mccb-working-principle","tag-mphasis-interview-questions-and-answers","tag-nagarro-software-pvt-ltd-interview-questions-and-answers","tag-ncr-corporation-interview-questions-and-answers","tag-netapp-interview-questions-and-answers","tag-opentext-technologies-interview-questions-and-answers","tag-randstad-india-pvt-ltd-interview-questions-and-answers","tag-rbs-india-development-centre-pvt-ltd-interview-questions-and-answers","tag-reliance-industries-ltd-interview-questions-and-answers","tag-sap-labs-india-pvt-ltd-interview-questions-and-answers","tag-tech-mahindra-interview-questions-and-answers","tag-the-linde-group-interview-questions-and-answers","tag-unitedhealth-group-interview-questions-and-answers","tag-wells-fargo-interview-questions-and-answers","tag-xoriant-solutions-pvt-ltd-interview-questions-and-answers","tag-zigma-technologies-interview-questions-and-answers"],"yoast_head":"\nFor 415v, 3phase, 22kw rating of motor how to calculate MCCB rating ?<\/title>\n<meta name=\"description\" content=\"For 415v, 3phase, 22kw rating of motor how to calculate MCCB rating ? 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