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 3 replies
  • Subscribers 32 subscribers
  • Views 590 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Safety Isolating v Isolating Transformers

Les Spiteri
Anybody able to explain the difference to me as I hear both terms used?
  • I see centre-tapped maybe the difference with this being a safety isolating.

  • Whereas 0-110V is simply isolating?


And when and where would an application suit either? Normally these days all control panel transformers are 0-110Vac for control although quite often when you debug older panels you will see Centre Tapped ones?
Parents
  • 0
    A safety isolating transformer (e.g. SELV) has a separate layer of insulation between the primary and secondary windings, so it's not relying just on the thin lacquer coating on the coil wires for protection.


    A centre tapped transformer, where the centre tap is earthed - like the "yellow" supply at a building site, gives a decent voltage end-to-end (e.g. 110V) while ensuring that any live conductor is, e.g. no more than 55V from E.


    The two techniques are not mutually exclusive.
Reply
  • 0
    A safety isolating transformer (e.g. SELV) has a separate layer of insulation between the primary and secondary windings, so it's not relying just on the thin lacquer coating on the coil wires for protection.


    A centre tapped transformer, where the centre tap is earthed - like the "yellow" supply at a building site, gives a decent voltage end-to-end (e.g. 110V) while ensuring that any live conductor is, e.g. no more than 55V from E.


    The two techniques are not mutually exclusive.
Children
No Data

Community Rules & Guidelines