Breaker I2t IN or OUT 1

[wbd]

Hello,

I have read the manual it is not specific on where the STD setting is I2T in or out.

On attached cut sheet, the Short Time dial has I2t IN above it with some delay numbering with a line across the hash marks and the other half without any line. So is I2t IN when dial pointer is on a setting with the line above the hash marks? In the attached cut set, would the STD of 0.5 be I2t IN or OUT?

The same question for the Ground Fault Delay. As shown, is it 0.1 I2t IN or OUT?

Thanks.

 

[davidbeach]

For STD all you have is I2T in. All of the settings with the line above are 0.5. An eight position switch with only four settings.

For ground all you have is I2T out, again with 5 different places to choose 0.5.

 

[rbulsara]

It is clearly stated in the descriptions of "Short Time Delay" and "Ground Fault Delay" in our attachment.

If the pointer in in the hash mark region, it will be considered a setting of 0.5 (IN or OUT as applicable). As you can see they read 0.5 at both ends of the hash marked band.

Rafiq Bulsara

http://www.srengineersct.com

 

[wbd]

Thank you all. My mistake was assuming that you had the choice of either picking an I2t IN or OUT function but I now see that it is exclusive, either IN or OUT. Now that I read the instructions in that light it makes sense.

 

[Zogzog]

Not sure it makes sense, why not have the option available? Sort of limits your ability to swap breakers around if you have different types of loads. Guess to have to buy a different trip unit if you want to use it in another application.

 

[wbd]

It makes sense when read and look at the dials,knowing that only one function (either In or Out) is available. I guess was used to other trip units where you have the option of both In and Out.

Must be a marketing decision on what to include as technically both can be included to give the end user a choice.

 

[rbulsara]

Yes this is somewhat unusual. Most trip units have selection for both IN and OUT.

Rafiq Bulsara

http://www.srengineersct.com

 

[VTer]

Attached is a photo of a Micrologic trip controller. All the ones I have seen and specified have the option for the I2t in or out. I am positive the one you are looking at does too, but call Sq. D and find out for sure.

"Throughout space there is energy. Is this energy static or kinetic! If static our hopes are in vain; if kinetic — and this we know it is, for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature". – Nikola Tesla

 

[wbd]

VTer - thank you. The difference as I see it is that there is actual numbers on both sides for ON & OFF for the I2t. The trip unit I am looking at only has numbers on one half and does state I2t IN on the STD and I2t out on the Ground Fault. The numbers that are missing on the dial correspond to the Out position for STD and the IN position for the grnd. Therefore, it can be concluded that this trip unit only has a I2t IN for STD and I2t OUT for Ground. No choice

 

[VTer]

What confuses me is the .5 setting shown on the dial side that is missing the rest of the numbers. They might not have shown the rest of the numbers on that side but I don't know why. Not sure, but if you can, you probably want to ask for both options to allow you flexibility for better coordination with other OCPDs.

"Throughout space there is energy. Is this energy static or kinetic! If static our hopes are in vain; if kinetic — and this we know it is, for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature". – Nikola Tesla

 

[davidbeach]

Its a type PE breaker, kind of lonely step-child in the Square D line. Be glad you can get a micro-logic trip unit, don't expect it to have as many bells and whistles as some of the others. Back in the day, the PE was used when the more capable SE was too expensive, so the PE only has the cheapest version of the trip unit. All five settings under the bar are 0.5; there are only four settings and eight positions, so five positions wind up being the same setting, see above.

 

[wbd]

Thank you davidbeach. That explains alot.