hi,
at a 150 kV conventional substation (air insulation) that has LA, CVT, DS+E, DS, CB, CT, Tx, which one of these apparatus should be connected to grounding mesh?
and, which one should not be ?
thank you.
Hi
I'd like to know, what points should we consider while choosing EHV (275 kV) switchyard busbar conductor or equipment conductor?
i.e. AAC vs AAAC?
thank you
Hi.
i already have arrester with rated voltage is 144kv for 150kv system voltage,
how do you determine the rated voltage of an arrester for 275kv system voltage? type metal-oxide w/o gaps.
IEC60099-4, tabel 2 gives range of rated voltage 96-288(kv r.m.s) with steps of rated voltage 12kv...
Hi,
in order to run / operate electrical network,
which type of power factor should we keep having?
if a system runs on leading power factor, what is the main effect ? does it matter to have leading or lagging?
since it just depends on the type of loads
thank you
Hi,
what is the main purpose? if you install a Lightning Arrester (or Surge Arrester?) with a power transformer 150/20 kV 60 MVA on HV side.
as lightning protection or switching ?
best regards
Hi,
I've been trying to find any standard on the net (IEC, NEM, etc) about the maximum (or minimum) value of grounding resistance for a substation.
I appriciate any help.
Thank you.
Hello,
Let's say there's a power transformer : 480/230 VAC,
should we *always* use it as step DOWN? by connecting the source (480 V) to HV side and load (230 V) to LV side?
or can we use it as step UP transformer? by connecting a load (480 V) to HV side and source (230 V) to LV side.
I...
Hello, i need help
lets say there's a power system network, and i want to determine remote (and local) source impedance on two terminal (a transmission line), how do i calculate the remote source impedance ? or at least, where do i go to learn about this ?
thank you
