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FSDMR series

Product catalog summary

Overview: The document provides technical specifications and details for high-temperature enclosed isolators designed by Craig & Derricott Ltd. These isolators are crucial for maintaining power to smoke extraction systems in high-temperature environments, ensuring safety during evacuations.

Specifications: The isolators are rated for 20A to 125A and comply with BS EN 12101-3:2002 standards. They are 'F400' rated, meaning they can withstand 400°C for 120 minutes. The enclosures are IP65 rated, ensuring protection against dust and water, and are finished in red paint (RAL 3020).

Design and Functionality: The isolators are housed in metal enclosures to prevent distortion under high temperatures. They are designed to maintain power to essential equipment like smoke extraction fans, which is critical for safe evacuations in case of fire.

Catalogue References: The document lists various models with different configurations, such as 2P, 3P, 3P+N, and 4P, each with specific catalogue numbers. These models are available in different enclosure types, including sheet steel and die-cast aluminum.

Technical Data: The isolators are tested against IEC/BS EN 60947-3 standards. Key parameters include rated thermal current (Ithe), rated insulation voltage (Ui), and rated impulse voltage (Uimp). The document also provides details on operational power ratings for different voltages and short circuit current specifications.

Recommendations: The document suggests using specific terminal types and tightening torques for flexible and rigid cables to ensure optimal performance and safety.

Catalog excerpts

Fire Rated Isolators switch Enclosed isolators for high temperature use. • 20A - 125A ratings • BS EN 12101-3:2002 tested • ‘F400’ rated throughout • IP65 Metal enclosures • Padlocking in ‘OFF’ & ‘ON’ • Red paint finish (RAL 3020)

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'Switch- Fire Ratecl (Hi9h Temperature) "Smoke kills more people than fire" A well known fact, and lation designer to ensure this doesn't happen - will need continuous General Description Craig & Derricott have been designing electrical switchgearfor more than 65 years and it's from this expertise that a development for the ventilation industry has led to the extensive 'High Temperature Isolator' range. Contact stability at extended temperatures, typically 400°C for 2 hours (F400), is the basis of the design. The critical role these switches perform is to maintain the power to vital equipment...

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