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How trapped key interlocking protects workers at HV substations
08 Jun 2015

Interlocking switchgear within HV substations ensures that personnel operate equipment safely, according to the correct procedures. Using a well-designed trapped key interlocking scheme will prevent personnel accessing potentially dangerous areas before the switchgear system has been put into a safe condition. A good interlocking scheme will also ensure that the system functions correctly, so that […]
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Why Choose Castell?

  • Experience - Established in 1922, we have been in the safety industry for over 80 years
  • Flexibility - We create customized solutions to solve any of your needs
  • Innovation - Product development is inspired by close industry relations
  • Safety - We not only adhere to current OSHA and ANSI regulations, but work to provide the safest possible environment
  • Trust - Castell has been a key part of the safety industry since its very creation

Founder/Inventor:
James Harry Castell
1880 - 1953
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