Abstract: The present disclosure relates to a vacuum circuit breaker in which lift hooks are accommodated, the circuit breaker having accommodated lift hooks mounted therein to allow a user to lift the lift hooks and use same whenever necessary, and accommodating the lift hooks after use, thereby improving user convenience. The circuit breaker according to the present invention may comprise: a circuit breaker main body; a plurality of fixing bolts mounted on and fixed to the circuit breaker main body; and the lift hooks, each having a plurality of moving holes into which the plurality of fixing bolts are inserted, and moving along the plurality of moving holes in a sliding manner.

Abstract: The present disclosure provides a plug interlock device for a circuit breaker, comprising: a lever-type withdrawable interlock assembly provided at a transfer car so that inputting and withdrawal of a breaker main body can be locked; a plug connector assembly, which rises/lowers in response to insertion or separation of a control line plug into or from a connector provided at the upper part of the breaker main body; a shaft, which rotates in different directions according to the elevation of the plug connector assembly by connecting one side thereof to the lower end of the plug connector assembly; and a blocking plate connected to the other side of the shaft so as to lock or unlock the operation of the lever-type withdrawable interlock assembly while horizontally moving according to the rotation of the shaft.

Abstract: The present disclosure relates to a vacuum circuit breaker in which lift hooks are accommodated, the circuit breaker having accommodated lift hooks mounted therein to allow a user to lift the lift hooks and use same whenever necessary, and accommodating the lift hooks after use, thereby improving user convenience. The circuit breaker according to the present invention may comprise: a circuit breaker main body; a plurality of fixing bolts mounted on and fixed to the circuit breaker main body; and the lift hooks, each having a plurality of moving holes into which the plurality of fixing bolts are inserted, and moving along the plurality of moving holes in a sliding manner.

Abstract: The present disclosure provides a plug interlock device for a circuit breaker, comprising: a lever-type withdrawable interlock assembly provided at a transfer car so that inputting and withdrawal of a breaker main body can be locked; a plug connector assembly, which rises/lowers in response to insertion or separation of a control line plug into or from a connector provided at the upper part of the breaker main body; a shaft, which rotates in different directions according to the elevation of the plug connector assembly by connecting one side thereof to the lower end of the plug connector assembly; and a blocking plate connected to the other side of the shaft so as to lock or unlock the operation of the lever-type withdrawable interlock assembly while horizontally moving according to the rotation of the shaft.

Abstract: Risperidone is prepared in a high yield by reacting 2,4-difluorophenyl(4-piperidinyl)methanone oxime hydrochloride and 3-(2-chloroethyl)-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one in an aqueous alkali hydroxide solution having an alkali hydroxide concentration in the range of 20 to 40%.

Abstract: Risperidone is prepared in a high yield by reacting 2,4-difluorophenyl(4-piperidinyl)methanone oxime hydrochloride and 3-(2-chloroethyl)-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one in an aqueous alkali hydroxide solution having an alkali hydroxide concentration in the range of 20 to 40%.