<p style="text-align:justify"><span style="font-size:14px">Isolators are off load operating switches. They are provided on both sides of an associated breaker. When any maintenance of the breaker (cleaning of contacts, adjusting spring pressure etc.) is required to be carried out, the breaker will be made off. Referring to figure 5.1, it can be appreciated that the fixed contacts of breaker are yet live even after opening it. Hence maintenance of the breaker is possible only after opening the isolators. </span></p>

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