Help please, new device to me{/b}
This MCCB is in a distribution board in the consumer half of a substation at a school
We've now tested everything downstream of this (and another 2 similar devices).
My current understanding is that the maximum PSSC to operate this device a maximum of 3 times is 50% of the Icu, so 12.5kA , and I also need to take account of any percentage that may be set to bias the instantaneous trip. And that is all I know!
Can anyone educate me further? Is it a matter of trying to find manufacturer data regarding time/current graphs, let through figures, etc?
I'm needing to prove the distribution circuit is safe and adequately protected.
Thanks a lot for any help.
Click Help please, new device to me to continue reading this thread.
This content has been posted from our Electrical Advice website. You're welcome to reply to the question or post your own question, whether DIY or professional.
This MCCB is in a distribution board in the consumer half of a substation at a school
We've now tested everything downstream of this (and another 2 similar devices).
My current understanding is that the maximum PSSC to operate this device a maximum of 3 times is 50% of the Icu, so 12.5kA , and I also need to take account of any percentage that may be set to bias the instantaneous trip. And that is all I know!
Can anyone educate me further? Is it a matter of trying to find manufacturer data regarding time/current graphs, let through figures, etc?
I'm needing to prove the distribution circuit is safe and adequately protected.
Thanks a lot for any help.
Click Help please, new device to me to continue reading this thread.
This content has been posted from our Electrical Advice website. You're welcome to reply to the question or post your own question, whether DIY or professional.
