Load break fault make isolators are also available in the market and can be procured if specified during purchasing. However, their purpose is entirely different as explained by RAMConsult. Moreover, the circuit breaker is provided with trip coil which is energised when the trip relay gets activated in case of faults e.g. short circuit, over current, earth fault etc. etc. This protection function is not available in isolator.

For pricing information you may consult any of the local suppliers indicating your technical requirements as the price is sensitive to country of origin and the technical parameters laid down in the specification.