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Old 15th May 2018, 6:26 pm   #27
Bookman
Hexode
 
Join Date: Aug 2017
Location: Taunton, Somerset, UK.
Posts: 318
Default Re: European voltage in the UK?

The vast majority of transformers in our distribution substations will be configured such that 2 transformers will be provided but that each transformer will have the capacity to supply the total needs of that particular substation.
The secondary of each transformer will feed a switchboard that will comprise of two incoming circuit breakers that supplies power to a common busbar connected within the switchboard.
Centrally located within the switchboard is a further circuit breaker which connects each half of the busbars if so requested; it is called a bus section breaker or bus tie as referred to in ANSI nomenclature.
There will be outgoing circuit breakers on each half of the busbar that will feed one end of the ring (loop) circuit referred to by other. In this configuration each transformer will run at 50% if the substation is running at maximum capacity.
The latter system is employed on a global basis as it has the effect of increasing significantly the life of the transformers. In the event there is a fault on either transformer or similar all one need do is close the bus section breaker which will parallel the two transformers and this doubles the capacity of the substation. The only drawback is that the fault level will increase by 100%.
All of the breakers are controlled remotely by the DNO by way of their DCS (Distributed Control System) and higher level SCADA (Supervisory Control and Data Acquisition System) using dedicated or BT telecontrol networks.
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