Circuit Breaker DIP Switches - MAN vs ELT

[adamscb]

I have a circuit breaker that has dip switches for the different LSI trip set points. I'm looking on here and there's also a DIP switch for N (on/off, 50%/100%), I'm pretty confident this is for a neutral wire (which this is a 3 pole breaker, so that doesn't apply)


However, there's a switch for MAN vs. ELT. What do these mean, any insight?

 

[jim dungar]

I have a circuit breaker that has dip switches for the different LSI trip set points. I'm looking on here and there's also a DIP switch for N (on/off, 50%/100%), I'm pretty confident this is for a neutral wire (which this is a 3 pole breaker, so that doesn't apply)


However, there's a switch for MAN vs. ELT. What do these mean, any insight?

How about a manufacturer and part number?

 

[Jraef]

I have a circuit breaker that has dip switches for the different LSI trip set points. I'm looking on here and there's also a DIP switch for N (on/off, 50%/100%), I'm pretty confident this is for a neutral wire (which this is a 3 pole breaker, so that doesn't apply)


However, there's a switch for MAN vs. ELT. What do these mean, any insight?

ELT just means Electronic Trip. That dip switch is there only for when you plug in a communication unit to communicate the breaker, MAN means you are going to manually scroll through and talk to individual register values, ELT means you want to talk to the entire ELT memory. LOC and REM have to do with whether you want the Comm module to take control of the trip settings (REMote) or let the breaker do it (LOCal). It means nothing to the way the breaker operates if the Comm module is not attached, so leave it as it came from the factory.

I only know this because I too was very confused by it the first time I came across is and it took some serious digging around to find that, I just saved you the trouble.

By the way, you are right about the N dip switch, except that it is only valid for their 4 pole breakers where they have to sense and switch the Neutral, which we don't use in North America. But they only make the one ELT unit, so it has everything on it whether it applies to your version or not.

 

[adamscb]

ELT just means Electronic Trip. That dip switch is there only for when you plug in a communication unit to communicate the breaker, MAN means you are going to manually scroll through and talk to individual register values, ELT means you want to talk to the entire ELT memory. LOC and REM have to do with whether you want the Comm module to take control of the trip settings (REMote) or let the breaker do it (LOCal). It means nothing to the way the breaker operates if the Comm module is not attached, so leave it as it came from the factory.

I only know this because I too was very confused by it the first time I came across is and it took some serious digging around to find that, I just saved you the trouble.

By the way, you are right about the N dip switch, except that it is only valid for their 4 pole breakers where they have to sense and switch the Neutral, which we don't use in North America. But they only make the one ELT unit, so it has everything on it whether it applies to your version or not.

Thank you for saving me the trouble Jraef, much appreciated!

And might be dumb question - what do you mean by switching the neutral?

 

[GoldDigger]

Thank you for saving me the trouble Jraef, much appreciated!

And might be dumb question - what do you mean by switching the neutral?

Particularly where an SDS implementation of alternate power is concerned (like a transfer switch for some portable generators) the neutral must also be switched just as the ungrounded leads are. Otherwise leaving the two neutrals solidly connected would result in two neutral to EGC/GES bonds in different locations, which is an NEC violation.

And for gasoline dispensers, the disconnect is required to interrupt both ungrounded and grounded conductors.