Hi guys, been trying to chase impedences but no luck as of yet, nothing on tanks, name plates, tech specs we have or online will have abit more of a poke around tomorrow, even contact manufacturer. Found out the line will run close to 20MVA or 350A at 33kv so should nearly be dragging on the...
MBrook - yes all our substation site have a local earth system for each site, it can be either a seperate earth which is generally used on rural single and 3 phase subs( hv and Lv Brough down on to individual earth systems seperated by a distance calculated in our earthing program), single...
The earthing system of this site incorporates an earth ring ( 4.5m width x 5.5m length) of 6 x 1.2m CU electrodes installed at .6m below ground line connected by 120mm CU cable this also has 1 x additional earth stake off each end of the ring. The regulator is bonded to a earthed steel frame...
Our distribution transformers are per wired from the manufacturer primary delta, secondary Wye, and are unable to be changed..
We seem to be getting away from the original question, I will follow up on the earthing situation tomorrow ( they were meant to test earth continuity from each tank to...
Sorry I should have noted I'm from Australia and we run a HV delta system ( no O/H earthed system neutral). Star connection is a common arrangement on the national grid for 33kv regs as to lower costs and use 22kv regs ( 19.1kv individual phase ratings) . Each S/L connection of each tank was...
Hi guys, I will start with I am not a Engineer but work as a HV ( LV to 33kv ) distribution designer and have a question for the knowledgeable engineers on here. I have recently upgrade a 3 tank 3 phase star connected 33kv voltage regulator site from 200A regs ( 22kv rated) to 300A regs( 22kv...
