This transformer is equipped to the ring main feeder through two units of switchgear (Load break switch, which can switch at light loads), then through a fused load break switch (which is cheaper than the circuit breaker) to protect the transformer from over current at fault time. This is known as Ring Main Unit (R.M.U).
its nice idea to share up knowledge regarding ring main unit, that usally used to maintain the electricity supply, according to the needs.
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