"Intelligent" circuit breakers?
"Intelligent" circuit breakers?
(OP)
I have a client with some very unusual design requirements.
We're going to have a 1200A service entrance panel, which we'll call panel "A." Panel A supplies a 1200A automatic transfer switch. Panel "B" is a 1200A main distribution panel supplying all the buildings at the site.
The client wants panel B to be fed from two different paths: one set of feeders directly from panel A, and another set of feeders via the automatic transfer switch. He wants to essentially "isolate" the transfer switch while still keeping panel B energized in an event that maintenance staff may need to work on it.
If one 1200A circuit breaker at panel A is in the "on" postion, then the other 1200A circuit breaker must be in the "off" position, and vice-versa. How can this possibly be accomplished?
We're going to have a 1200A service entrance panel, which we'll call panel "A." Panel A supplies a 1200A automatic transfer switch. Panel "B" is a 1200A main distribution panel supplying all the buildings at the site.
The client wants panel B to be fed from two different paths: one set of feeders directly from panel A, and another set of feeders via the automatic transfer switch. He wants to essentially "isolate" the transfer switch while still keeping panel B energized in an event that maintenance staff may need to work on it.
If one 1200A circuit breaker at panel A is in the "on" postion, then the other 1200A circuit breaker must be in the "off" position, and vice-versa. How can this possibly be accomplished?






RE: "Intelligent" circuit breakers?
RE: "Intelligent" circuit breakers?
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RE: "Intelligent" circuit breakers?
Is there a requirement to maintain power to the load while transfer is effected? That is trickier - most likely it would be controlled through procedural means unless you are looking for additional cost and complexity to implement a high integrity automatic system.
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RE: "Intelligent" circuit breakers?
If you need to automate the voltage sensing and transfer of power, a relay such as Eaton "IQ Transfer" may be employed as part of the control wiring.