Engineering problem, please help!

[Geordie Spark]

why not ask your cow ?
shes stood in an isolated field.

I was told she is outstanding in her field.

 

[Engineer54]

I'm not going back digging them up! They've been like that for the last 40 years. The tapes from the NER were connected to the MET along with everything else. Obviously the star point to the NER link was separate. Nice set up too, the link was a knife switch operated through linkage from the ground.
The 11KV and 3.3KV set ups were the same.

I'm just looking at the drawings of our Main MV/LV Substation Building for the general Hospital. Which incorporates 3 X 16OOKVA TX and a 3MVA standby MV generator (c/w it's NGR) Drawing showing a common earth mat for the 3 TX, with connections to a 3 way split removable link earth bus bar located in the MV Switch room. A small but separate mat for the MV generator that is supplied via a separate link earth bar. Mat connected to one side and the NGR on the other... The LV side of things are earthed via the 2 large earth fields one at each end of the site, via a 240mm from each earth field... These connect to the buildings main LV wall mounted multi split main earth bar.

So not even the normal MV earthing fields have any link or connection to the MV generators NGR...