In Hevacomp Connect where it checks the energy let through calculation I am trying to work out how I2t (current squared multiplied by time) is calculated. On the Results tab for each circuit you can view the value of I (current) and the time duration of the fault. I was expecting that these values would equate to the Energy (I2t) result shown on the same page.
For a particular circuit I get the following results: Short circuit current is 5166amps, fault duration of 0.018secs and disconnection time of 0.003secs. Energy (I2t) is shown as 29,096.I've checked the help file page which concurrs with my expectations which are as the regulations lay out the calculation, but this doesn't explain why Energy (I2t) result isn't current squared multiplied by time as per the other results shown on that page for that circuit.. Any explanation of how the software performs this calculation would be appreciated.
Hi. The protective device is an Eaton Memshield 3 range EMCH type C 63 amp.Thanks
That answers my question nicely - thank you.
Glad to have helped, Derek. I thought this information may prove useful for other users, so I have generated a Wiki article which should make it easier for other users to search for.
Duncan Brown