The transformer is fitted with an off-circuit tap changing switch to obtain required tap voltage. It can be hand operated by a switch handle mounted on the tank. Locking device is fitted to the handle to padlock it on any tap position and also to prevent any unauthorized operation of switch. The switch mechanism is such that it can be locked only when it is bridging two contacts on any particulars tapping position and cannot be locked in any intermediate position.
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Негізгі бет Tap Changer for Distribution Transformers
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