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Guidelines to Maintenance of Low Voltage Switchboard

Guidelines to Maintenance of Low Voltage Switchboard

guide-to-maintenance-low-voltage-switchboard

Maintenance Benefits and ERROR: The requested URL could not be retrieved

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    A. Maintenance Program

    A well-executed maintenance program can provide the following benefits:

    1. Longer life of ; } #dirlisting tr.entry td.icon,td.filename,td.size,td.date { border-bottom: groove; } #dirlisting td.size { width: 50px; text-align: right; padding-right: 5px; } /* horizontal lines */ hr { margin: 0; } /* page displayed footer area */ #footer { font-size: 9px; padding-left: 10px; } body :lang(fa) { direction: rtl; font-size: 100 switchboard and fewer replacements;
    2. Reduced time on

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      B. Maintenance Records

      A maintenance file should be established which should include the ; margin-right: 2 following:

      1. A record of all installed switchboards and their maintenance schedule;
      2. Nameplate data of all the equipment and its major components, instruction books, renewal parts lists, bulletins and drawings;
      3. A list of all items which have to be inspected and what adjustments are to be checked;
      4. A record of past inspections and ; } /* Page displayed body content area */ #content { padding: 10px; background: #ffffff; } /* General text */ p { } /* error brief description */ #error p { } /* some data which may have caused the problem */ #data { } /* the error message received from the system or other software */ #sysmsg { } pre { font-family:sans-serif; } /* special event: FTP / Gopher directory listing */ #dirmsg { font-family: courier; color: black; font-size: 10pt; } #dirlisting { margin-left: 2 test results.

       

      C. Maintenance Tests

      Maintenance tests are applicable as indicated:

      1. Insulation resistance tests of the switchboards’ breakers and bus can be useful indetermining the condition of the insulation if they are performed regularly. Since definite limits cannot be given for satisfactory insulation resistance, a record must be kept of ; font-family: Tahoma, Roya, sans-serif; float: right; } :lang(he) { direction: rtl; float: right; } -->

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      2. High potential tests are not required and are not recommended except in special circumstances, such as after repairs or modifications to the equipment that included the primary circuit (bus assemblies).When such tests are necessary, they may be conducted using 75% of the standard 60-cycle test voltage for new equipment.

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