We have been following 2 incomers and a bus coupler scheme arrangement with two buses in 0.415kV switchboard. Normally, each bus section is fed from incomer breaker and bus coupler breaker remains open. Auto change over scheme is employed on this switchboard. It enables automatic closing of...
For one project, we have a requirement of 10kVA parallel redundant UPS with common bypass. Till now we have only purchased UPS which have static switches in bypass and inverter path. Recently one vendor has offered a UPS which has a static switch on bypass path, however they have provided...
Could anyone please explain the attached tripping curves on MN type thermal overload relay? Why are there two different hot and cold curves given? what is their significance?https://files.engineering.com/getfile.aspx?folder=7b3be7ff-57f1-4cee-90b9-ee51b0f48146&file=mntyperelay.PNG
I have requirement of 10kVA UPS which will be fed from 415V 3 phase input supply, and output is 110V AC single phase.
I have several questions as listed below about the same:
1) Which factors decides the UPS input supply neutral requirement : Several manufacturers are offering UPS with 3ph/3...
