I am involved in a refurbishment project that has old (imperial) PILC cables. These date from the early 60's.
Does anyone know where to find a table for current carrying capacities?
NB This is in the UK if that makes an difference.
I am struggling with a fault calculation for a generator installation.
I have a 1500kVA 400V 3ph generator with instantaneous If 16655A, short term If 12028A for 0.135s and sustained If 5,400A. But what do I imput for the external impedance; is it simply 230/5400=0.04?
Does the Zoom To command work in Autocad LT2000? Using the Edit>Find command I can locate the text string I'm looking for, but when I hit the Zoom To button I get a blank screen.
All the layers are on/unfrozen so I don't understand what's going on.
Any offers?
I am involved in a UK project that has a 11kV/433V sub-station, but have come across conflicting information regarding REF protection. Are there any hard and fast rules when REF protection should be used on the LV side of a transformer and when it shouldn't?
If it is/isn't used what are the...
I have been looking at a drawing showing protection of HV, transformers, generators and LV. The drawing has the protection relays shown as numbers e.g. 51N, 96N, 32 and so on. Can anyone tell me where it is possible to find a definitive list of these as I know some but not all.
By the way...
