Switching system with a combined switching and blocking device

A switching system, having:

• at least one fused switch unit (10) with a fuse link (20) which can be switched to and fro between a switched-on position and a switched-off position,
• a switch for closing and interrupting the circuit of the switching system, said switch having an operating lever (31),
• a combined switching and blocking apparatus (30) which can prevent the circuit from being closed by the switch, said combined switching and blocking apparatus (30) including a blocking element (32) having at least one blocking rod (33) for said fused switch unit (10), said blocking rod (33) being mounted on said operating lever (31) of said switch for closing and interrupting the circuit,
• an interlocking element (35) having an opening (36) is provided for said fused switch unit (10) and arranged in said fused switch unit (10) such that said interlocking element (35) can be switched to and fro together with said fuse link (20), and so that
• (A) said blocking rod (33) can be inserted into the opening (36) in said interlocking element (35) only when said fuse link (20) is in said switched-on position,
• (B) said operating lever (31) of the switch can be switched to close the circuit only when said blocking rod (33) can be inserted into said opening (36) in said interlocking element (35), and
• (C) said fuse link (20) cannot be moved to its switched-off position when said blocking rod (33) is inserted in said opening (36) in said interlocking element (35).