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20151218 Daily Question: The rewards are as follows: 1-3 points for a correct answer, 5 points for a correct answer with an analysis, and 8-10 points for a correct answer along with an analysis. A drawer-type circuit breaker should generally have ( ). A. Connected, isolated, disconnected – three positions B. Connected, tested, isolated – three positions C. Connected, tested, disconnected – three positions D. Connected, disconnected, isolated – three positions The answer is B
A drawer-type circuit breaker should generally have (B). A. Three positions: connected, isolated, disconnected B. Three positions: connected, tested, isolated C. Three positions: connected, tested, disconnected D. Three positions: connected, disconnected, isolated
C. Three positions: connect, test, separate
A C-type drawer circuit breaker consists of the circuit breaker body and the drawer base. There are guide rails on both sides of the drawbar seat, and the circuit breaker body is mounted on these left and right guide rails. A drawout circuit breaker connects the main circuit by inserting the busbar on the circuit breaker body into the bridge contacts in the drawout frame. The pull-type circuit breaker has three operating positions: the \"connected\" position, the \"testing\" position, and the \"disconnected\" position. The change between these positions is achieved by turning the handle outward or inward. Indications for the three positions are shown by pointers on the crossbeam at the bottom of the swivel seat. When in the “connected” position, both the primary circuit and the secondary circuit are connected ； When in the “test” position, the main circuit is disconnected and separated by an insulating partition; only the secondary circuit remains connected, allowing for the performance of certain necessary functional tests ； When in the “separated” position, both the primary circuit and the secondary circuit are disconnected. Furthermore, the pull-type circuit breaker is equipped with a position interlock device; the circuit breaker can only be closed when it is in the \"connected\" position or the \"testing\" position, and it is not allowed to be closed at any position between the \"connected\" and \"testing\" positions.
A drawer-type circuit breaker should generally have (b). A. Connected, isolated, disconnected – three positions B. Connected, tested, isolated – three positions C. Connected, tested, disconnected – three positions D. Connected, disconnected, isolated – three positions
A drawer-type circuit breaker should generally have (B). A. Connected, isolated, disconnected – three positions B. Connected, tested, isolated – three positions C. Connected, tested, disconnected – three positions D. Connected, disconnected, isolated – three positions
A drawer-type circuit breaker should generally have (B).
B. Three positions: Connect, Test, Isolate
B. Three positions: Connect, Test, Isolate