The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 7 replies
  • Subscribers 36 subscribers
  • Views 1179 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Rotary Switch Utilisation Categories

vantech

Hi, 

I am looking for a rotary switch which can act as an isolator for an entire installation. 

There are different types of utilisation categories, which outline certain load types for operation and switching (AC1, AC2, etc.) 

Obviously a standard installation has any number of load types connected to it that are not covered by the specified utilisation categories. 

How is the generally covered? The isolator will be ON 24/7, therefore no mechanical switching will be taking place. I believe that generally the utilisation categories relate mainly to the switching on/off of the load, rather than the load itself during operation. 

Thanks. 

Parents
  • 0

    The isolator will be ON 24/7, therefore no mechanical switching will be taking place. I believe that generally the utilisation categories relate mainly to the switching on/off of the load, rather than the load itself during operation. 

    I guess the thinking is that unless it's interlocked in some way, the main switch for an installation may well be used to switch on or off everything when under load - especially if it's called on for situations that require rapid (or emergency) disconnection or might be closed by ordinary persons who don't appreciate the advantages of switching off individual loads first.

       - Andy.

Reply
  • 0

    The isolator will be ON 24/7, therefore no mechanical switching will be taking place. I believe that generally the utilisation categories relate mainly to the switching on/off of the load, rather than the load itself during operation. 

    I guess the thinking is that unless it's interlocked in some way, the main switch for an installation may well be used to switch on or off everything when under load - especially if it's called on for situations that require rapid (or emergency) disconnection or might be closed by ordinary persons who don't appreciate the advantages of switching off individual loads first.

       - Andy.

Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines