Hola esteban, los amperios frame ( frame = marco ) y amperios trip ( trip = disparo )

los primeros son el amperaje normal del interruptor ya sea 100, 150, 200

los segundos son los amperes en los que ocurre el disparo del mismo
este parametro es ajustable en algunos interruptores

saludos

Esteban, al acercarse la corriente a un valor peligroso el relé enciende un LED, indicador de que la corriente esta ingresando al campo de tus curvas de protección, este indicador se llama Umbral o Pick Up. Una vez superada la corriente en este valor y despues del tiempo que indicque la curva, se realiza el disparo o Trip.

Esteban:

Adicionando a lo que Bernardo comento aqui unos link`s que te pueden ayudar en tu duda.

Https://ewh.ieee.org/r6/san_francisco/ias/pdf/archived_presentations/Interrupting_Capacity. Pdf
https://www.engineersedge.com/instrumentation/components/low_voltage_circuit_breaker. Htm

Https://www.tpub.com/neets/book3/8i. Htm

Https://www.albanconsultantscorner.com/pdf/GensetAccessories/CKt%20BkrRframe%201250-3200%20LEHE4891. Pdf

Espero te sirva de ayuda

Carlos Alberto - Brasil

Yo encontre un par de respuestas por internet que te pueden servir:

Saludos amigo, bien, cuando seleccionas un interruptor electromagnético (termomagnético) el valor en amperios de marco (amper frame) indica la corriente nominal del equipo, es decir a la que puede trabajar normalmente, la otra corriente, de disparo (amper trip) es la corriente en la que el interruptor va a disparar (por sobrecarga o sobre corriente) por eso esta ultima suele ser mayor que la primera.

AF just means " Ampere Frame ". It is only used as a short hand way of describing the way a particular manufacturer has designated the frame size they chose to use for the trip value you are wanting. The trip value is referred to as " Ampere Trip " or AT . Here is an example;

Siemens makes a line of breakers called the 3VL. They have several different Frame Sizes: 150A, 250A, 400A, 600A, 800A etc. If you need a 400A breaker, you can order that as a 400AT 400AF, but you can also order a 400AT 600AF, or even a 400AT 800AF breaker. All of them have 400A trip settings, but the 400AT 400AF version can never be replaced with a larger trip, because you are already at the maximum rating of that frame (400AF). If there is a chance that your application may require a larger circuit some day in the future, you can buy the 600AF 400AT breaker and if you need 500A next year, you can replace the Trip Module with a 500AT unit without exceeding the 600AF rating.

None of this has ANYTHING to do with the Short Circuit rating capacity. However, each manufacturer has economies of scale to contend with when making breakers. So when they make a 150AF breaker, there may be plenty of applications where 22kA is adequate. But in a 600AF breaker, MOST of the applications are likely ones where there will be at least 50kA available, so to avoid having to make and maintain inventory on 22kA 600A breakers that few people will buy, they only offer it in a 50kA version. There is nothing more to it than that.

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