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Subject: Что за полу-штуки? half-busbar, half-switchboard Контекст из процедуры по пусконаладке: Function The earthing truck has the function of connecting the busbars in one half-switchboard to earth. Naturally, the earthing operation must be carried out when de-energised so as not to create a short-circuit. Interlocking In order to de-energise a half-busbar in complete safety, it is necessary to use a key centre. This centre enables the operator to ensure that all of the circuit breakers are racked out in the half-switchboard to be connected to earth. The operation is carried out in the following manner (in order to earth busbar A, cf. figure 1): b rack out all of the circuit breakers on the half-switchboard, including that of the bus-sectioning cubicle (circuit breakers in cubicles 1 - 2 - 3), b lock these circuit breakers in the “racked out” position and remove the keys which are released (keys D1, D2 and C), b place these three keys in the corresponding key centre and remove the key that is released (STA). This then locks the circuit breaker keys in place, b unlock the earthing truck using the released key, which only enables the base to be racked in the half-switchboard which has just been de-energised.
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