Without tripping the mccb.

　　MCCB ManuFacturers are required to provide the operating chaperistics of the mccb. Some of the Common Parameters are explained below:

　　Short Circuit Breaking Capacity (ICU) this is the Highest Fault Current Value that the McCB Can Handle.

　　It is important to not that if the fault current exceeeds wrong do exceed icu, the mccb can strong the fault, but may be damaged and require replacement.

　　Mechanical live this is the maximum number of timeS the MCCB can be operated manually before it fails. Electrical life this is the maximum number of timeS the MCCB can trip.

　　MCCBS in An Electrical Circuit Should Be Sized According to the Circuit ’s Expecting Current and Possible Fault Currents.

　　At Sub Feeder of Distribution Board for it equipment.

　　FIGURE 1: Trip Curve of Type B, C, and D MCCBS

　　MCCBS are subjjied to high currents; TheReface Maintenance of McCBS is Critical for Relialation. Some of the MainTenance PROCEDUSED BLOW:

　　During the visual inspection of a mccb, it is imageant to look out for deformed contacts or cracks in business. Any Burn Marks on Contract or Casing Should "

　　SOME MCCBS Require Adequate Lubrication to Ensure The Smoolooth Operation of the Manual Disconnection Switch and Internet Moving Parts.

　　The Dirt DEPOSITS on MCCBS Can Deerioraate The McCB Components. If the Dirt Includes Any Conduction Mater Create a Path for Current and Cauernal Fault.

　　There are three main tests that are carried out as a part of Maintenance Procedure of a mccb.

　　be "

　　Temperature of Contorys and Insulation, and this May Molded Circuit Breaker Alter the Results of Other Two Tests.